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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.295.4905" ID-GBIF-Dataset="59cbf2a9-41ca-4f5a-a350-ef034991798b" ID-PMC="PMC3677376" ID-Pensoft-Pub="1313-2970-295-1" ID-PubMed="23794874" ModsDocAuthor="" ModsDocDate="2013" ModsDocID="1313-2970-295-1" ModsDocOrigin="ZooKeys 295" ModsDocTitle="Revision of the Middle American clade of the ant genus Stenamma Westwood (Hymenoptera, Formicidae, Myrmicinae)" checkinTime="1451247354359" checkinUser="pensoft" docAuthor="Branstetter, Michael G." docDate="2013" docId="C72BECE7A6719D3A3C478B0EDB6E5F83" docLanguage="en" docName="ZooKeys 295: 1-277" docOrigin="ZooKeys 295" docSource="http://dx.doi.org/10.3897/zookeys.295.4905" docTitle="Stenamma huachucanum Smith" docType="treatment" docVersion="3" lastPageNumber="103" masterDocId="FFB3D3328201C177FF99FFC5FFA8A72C" masterDocTitle="Revision of the Middle American clade of the ant genus Stenamma Westwood (Hymenoptera, Formicidae, Myrmicinae)" masterLastPageNumber="277" masterPageNumber="1" pageNumber="97" updateTime="1668155749461" updateUser="ExternalLinkService">
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<mods:title>Revision of the Middle American clade of the ant genus Stenamma Westwood (Hymenoptera, Formicidae, Myrmicinae)</mods:title>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Branstetter, Michael G.</mods:namePart>
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<mods:title>ZooKeys</mods:title>
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<mods:date>2013</mods:date>
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<mods:number>295</mods:number>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.295.4905</mods:identifier>
<mods:identifier type="Pensoft-Pub">1313-2970-295-1</mods:identifier>
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<treatment ID-GBIF-Taxon="152043619" LSID="urn:lsid:plazi:treatment:C72BECE7A6719D3A3C478B0EDB6E5F83" httpUri="http://treatment.plazi.org/id/C72BECE7A6719D3A3C478B0EDB6E5F83" lastPageId="103" lastPageNumber="103" pageId="96" pageNumber="97">
<subSubSection pageId="96" pageNumber="97" type="nomenclature">
<paragraph pageId="96" pageNumber="97">
<taxonomicName LSID="urn:lsid:zoobank.org:act:80F4B353-D9ED-4F12-96B6-65BF6075BAEB" authority="Smith" class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="96" pageNumber="97" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum Smith</taxonomicName>
Worker: Figures 92-94; Queen: Figure 95; Map: Figure 91
</paragraph>
</subSubSection>
<subSubSection lastPageId="97" lastPageNumber="98" pageId="96" pageNumber="97" type="reference_group">
<paragraph lastPageId="97" lastPageNumber="98" pageId="96" pageNumber="97">
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="96" pageNumber="97" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
Smith, M. R. 1957: 153, pl 2, fig 8. Holotype worker: USA, Arizona, [Cochise Co.]: Head of Carr Canyon, Huachuca Mts., [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="31.432">31.432°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-110.284">110.284°W</geoCoordinate>
], 8000 ft. [2440 m], 24 July 1950 (W. S. Creighton) (USNM) [ex
<pageBreakToken pageId="97" pageNumber="98" start="start">amined</pageBreakToken>
]. Snelling, 1973: 34, figs 44, 45, 61, notes on worker. Branstetter, 2009: worker images. Branstetter, 2012: phylogeny, worker images.
</paragraph>
<paragraph pageId="97" pageNumber="98">
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma" order="Hymenoptera" pageId="97" pageNumber="98" phylum="Arthropoda" rank="genus">Stenamma</taxonomicName>
mgb38 [variant 5 below] Branstetter, 2012: phylogeny.
</paragraph>
</subSubSection>
<subSubSection pageId="97" pageNumber="98" type="worker diagnosis">
<paragraph pageId="97" pageNumber="98">Worker diagnosis.</paragraph>
<paragraph pageId="97" pageNumber="98">
Note this species is variable and difficult to characterize globally. See comments section below, discussing population variants. Integument mostly dark brown to brown; small-sized species (see HL, ML, PrW below); basal margin of mandible sinuous, with a distinct basal depression, but no tooth; anterior clypeal margin undulating, forming 2-4 blunt teeth; eye of moderate size (EL 0.07-0.12, REL 14-21), oval-shaped, with 4-8 (usually 5-6) ommatidia at greatest diameter; propodeal spines tuberculate to short (PSL 0.06-0.11, PSI 1.0-1.4); face usually completely sculptured, with carinulae, rugoreticulae and punctae, but some populations with posterior
<normalizedToken originalValue="¼">1/4</normalizedToken>
or less of head smooth and shiny; pronotal sculpture variable, often with some carinulae and punctae, but some populations completely smooth; remainder of mesosoma sculptured, with punctae, carinulae and/or rugulae; propodeal lobe in profile usually isolated from propodeal spine and with angulate corners, but some populations with lobe appearing broadly rounded and forming a smooth connection with propodeal spine; geography is useful in species determination. Similar species:
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma connectum" order="Hymenoptera" pageId="97" pageNumber="98" phylum="Arthropoda" rank="species" species="connectum">Stenamma connectum</taxonomicName>
,
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma crypticum" order="Hymenoptera" pageId="97" pageNumber="98" phylum="Arthropoda" rank="species" species="crypticum">Stenamma crypticum</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection lastPageId="98" lastPageNumber="99" pageId="97" pageNumber="98" type="geographic range">
<paragraph pageId="97" pageNumber="98">Geographic range.</paragraph>
<paragraph pageId="97" pageNumber="98">Southwestern U.S.A. to southern Mexico (Oaxaca).</paragraph>
<paragraph pageId="97" pageNumber="98">Worker description. (28 measured; paratype CASENT0105666 in parentheses) HL 0.52-0.72 (0.72), HW 0.46-0.64 (0.62), FLD 0.11-0.17 (0.17), PCW 0.03-0.05 (0.03), SL 0.43-0.55 (0.55), EL 0.07-0.12 (0.10), ACL 0.43-0.52 (0.52), ML 0.66-0.85 (0.85), PrW 0.33-0.41 (0.41), PSL 0.06-0.11 (0.09), SDL 0.05-0.09 (0.08), PL 0.23-0.35 (0.32), PH 0.15-0.21 (0.21), PW 0.11-0.16 (0.15), PPL 0.13-0.20 (0.17), PPH 0.14-0.19 (0.18), PPW 0.15-0.20 (0.19), MFL 0.44-0.59 (0.59), MTL 0.37-0.48 (0.48), CI 83-91 (86), SI 81-94 (89), REL 14-21 (15), FLI 23-29 (27), PSI 1.0-1.4 (1.1), MFI 101-124 (105), ACI1 67-71 (68), ACI2 92-103 (95).</paragraph>
<paragraph lastPageId="98" lastPageNumber="99" pageId="97" pageNumber="98">
Small-sized species; general body dark brown to brown (type population), with appendages brown or orange-brown to yellow-brown, usually lighter at joints and toward extremities; setae golden brown; mandible with 6-7 teeth, 2-3 teeth near basal tooth sometimes worn and indistinct; basal margin of mandible sinuous, with a distinct basal depression, but no tooth; mandible mostly smooth and shiny, with some scattered piligerous punctae, and some striations near base and on lateral surface; anterior clypeal margin undulating, forming 2-4 sharp to blunt teeth (4 sharp teeth in type population); median lobe of clypeus with a pair of longitudinal carinulae that diverge toward anterior margin, apex with a short transverse carinula, area in between median lobe and anterior clypeal margin forming a shallow concavity; remaining surface of clypeus mostly smooth; posterior extension of clypeus between antennal insertions somewhat narrow to moderate width (PCW 0.03-0.05), with sides subparallel; frontal lobes of moderate width (FLD 0.11-0.17, FLI 23-29), not greatly obscuring torular lobes in full-face view; head subrectangular to roughly oval-shaped (CI 83-92), posterior margin slightly depressed medially; eye of moderate size (EL 0.07-0.12,
<pageBreakToken pageId="98" pageNumber="99" start="start">REL</pageBreakToken>
14-21), oval-shaped, with 4-8 (usually 5-6) ommatidia at greatest diameter; face sculpture variable, usually completely sculptured, with light rugoreticulae, longitudinal carinulae, and/or punctae, but sometimes sculpture reduced, with posterior 1/4 or less of head becoming smooth and shiny; scape of short to moderate length (SI 81-94), usually not quite reaching posterior margin of head when laid back; scape surface mostly smooth to somewhat rough (type population), with variable density of piligerous punctae; flagellum with a distinct 4-segmented antennal club; pronotal sculpture highly variable, often with some longitudinal carinulae/rugulae and faint punctae (type population), but some populations completely smooth; remainder of mesosoma completely sculptured with punctae and a variable amount of rugulae/carinulae; promesonotum usually low-domed, and asymmetrical, with the anterior face longer and steeper than posterior face (type population), but some populations with promesonotum distinctly domed, and roughly symmetrical; metantoal groove present and distinct, of average width and depth; propodeal lobe in profile usually isolated from propodeal spine and with angulate corners, but some populations with lobe appearing broadly rounded and forming a smooth connection with propodeal spine; propodeal spines tuberculate to short (PSL 0.06-0.11, PSI 1.0-1.4); petiole length and shape variable, often short and stocky, with a somewhat large node that points vertically, and a sinuous venter (type population), but sometimes more elongate, with node smaller and pointing distinctly posteriad, or sometimes anteroposteriorly compressed, making it very narrow (PL/HW 0.46-0.59); postpetiole usually forming a small node, similar in size or smaller than petiolar node (type population) (PPH/PL 0.79-0.97); petiole and postpetiole usually mostly punctate, with only anterior faces of nodes smooth (type population), but some populations with punctae reduced and nodes mostly smooth; gaster usually completely smooth, but some populations with first sternite and tergite lightly to strongly punctate (variable in type population); most of body dorsum with relatively short standing pilosity; gastral pilosity distinctly to indistinctly bilayered, with a layer of longer suberect to subdecumbent setae, and a layer of decumbent setae, density of setae variable, usually relatively dense (type population); setae on scape decumbent to appressed; setae on legs decumbent to appressed with longer setae on femoral venters and coxae.
</paragraph>
<caption pageId="98" pageNumber="99">
<paragraph pageId="98" pageNumber="99">
Figure 92.
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="98" pageNumber="99" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
A, B, E, G, H Worker (CASENT0126556) C, D, F Paratype worker (CASENT010566).
</paragraph>
</caption>
<caption pageId="98" pageNumber="99">
<paragraph pageId="98" pageNumber="99">
Figure 93.
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="98" pageNumber="99" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
worker variants 1. Face, profile, and dorsal views
<normalizedToken originalValue="AC">A-C</normalizedToken>
Variant 1 (CASENT0600124)
<normalizedToken originalValue="DF">D-F</normalizedToken>
Variant 2 (CASENT0605749)
<normalizedToken originalValue="GI">G-I</normalizedToken>
Variant 3 (CASENT0605412)
<normalizedToken originalValue="JL">J-L</normalizedToken>
Variant 4 (CASENT0604596).
</paragraph>
</caption>
<caption pageId="98" pageNumber="99">
<paragraph pageId="98" pageNumber="99">
Figure 94.
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="98" pageNumber="99" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
worker variants 2. Face, profile, and dorsal views
<normalizedToken originalValue="AC">A-C</normalizedToken>
Variant 5 (CASENT0605616)
<normalizedToken originalValue="DF">D-F</normalizedToken>
Variant 6 (CASENT0605647).
</paragraph>
</caption>
</subSubSection>
<subSubSection lastPageId="99" lastPageNumber="100" pageId="98" pageNumber="99" type="queen description">
<paragraph pageId="98" pageNumber="99">Queen description.</paragraph>
<paragraph pageId="98" pageNumber="99">(8 measured) HL 0.55-0.71 (0.68), HW 0.50-0.65 (0.58) FLD 0.13-0.18 (0.16), PCW 0.03-0.05 (0.04), SL 0.43-0.56 (0.49), EL 0.15-0.18 (0.15), ACL 0.42-0.52 (0.49), ML 0.78-0.98 (0.85), PrW 0.43-0.59 (0.44), PSL 0.09-0.16 (0.12), SDL 0.06-0.10 (0.09), PL 0.29-0.38 (0.34), PH 0.16-0.23 (0.22), PW 0.13-0.18 (0.16), PPL 0.13-0.20 (0.18), PPH 0.15-0.21 (0.20), PPW 0.16-0.23 (0.21), MFL 0.46-0.60 (0.51), MTL 0.41-0.52 (0.45), CI 86-94 (86), SI 82-87 (85), REL 25-31 (25), FLI 23-28 (27), PSI 1.3-1.8 (1.3), MFI 105-114 (113), ACI1 66-71 (68), ACI2 92-100 (99).</paragraph>
<paragraph lastPageId="99" lastPageNumber="100" pageId="98" pageNumber="99">
Same as worker except for standard queen modifications and as follows (comparison with queens from near type locality only): pronotum with transverse carinulae/
<pageBreakToken pageId="99" pageNumber="100" start="start">rugulae</pageBreakToken>
; mesoscutum longitudinally carinulate, with a small patch of smooth cuticle anteromesad; scutellum smooth along midline, with longitudinal rugulae mesad; anepisternum partly smooth, remainder carinulate; katepisternum mostly smooth; propodeum with transverse carinulae that wrap around propodeum; propodeal spines longer than worker; gastral pilosity denser; wing venation as in Figure 95D.
</paragraph>
<caption pageId="99" pageNumber="100">
<paragraph pageId="99" pageNumber="100">
Figure 95.
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="99" pageNumber="100" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
A Queen (CASENT0600094), profile B Same, face C Same, dorsum D Same, wings.
</paragraph>
</caption>
</subSubSection>
<subSubSection pageId="99" pageNumber="100" type="male">
<paragraph pageId="99" pageNumber="100">Male.</paragraph>
<paragraph pageId="99" pageNumber="100">Unknown.</paragraph>
</subSubSection>
<subSubSection pageId="99" pageNumber="100" type="biology">
<paragraph pageId="99" pageNumber="100">Biology.</paragraph>
<paragraph pageId="99" pageNumber="100">
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="99" pageNumber="100" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
is a cryptic leaf litter ant known mostly from Winkler or Berlese samples of sifted leaf litter. As defined here, the species is widely distributed, occupying both relatively dry, seasonal habitats (e.g. tropical deciduous forest with juniper, oak-pine-juniper woodland, oak woodland, oak-pine-douglas fir forest) and tropical wet forest habitats (e.g. mesophyll forest, cloud forest, oak-pine forest). Collections have been made from 1000-2900 m, but the species is most common between 1600-2500 m. In seasonal habitats, workers have been found underneath rocks, in addition to the leaf litter.
</paragraph>
</subSubSection>
<subSubSection lastPageId="102" lastPageNumber="103" pageId="100" pageNumber="101" type="comments">
<paragraph pageId="100" pageNumber="101">
<pageBreakToken pageId="100" pageNumber="101" start="start">Comments</pageBreakToken>
.
</paragraph>
<paragraph pageId="100" pageNumber="101">
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
forms a difficult complex composed of many divergent allopatric populations. The complex probably includes several good biological species, but I have chosen to lump most forms into a single entity, because there is no clear evidence of sympatry among forms, and some specimens appear to have intermediate phenotypes that connect distinct forms. The exceptions to this lumping approach are the similar species
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma connectum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="connectum">Stenamma connectum</taxonomicName>
and
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma crypticum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="crypticum">Stenamma crypticum</taxonomicName>
. These species are morphologically similar to
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
, but molecular phylogenetic results provide strong evidence that they represent separate lineages (Branstetter unpublished data).
</paragraph>
<paragraph pageId="100" pageNumber="101">
There are some key morphological differences separating populations of
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
from
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma connectum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="connectum">Stenamma connectum</taxonomicName>
and
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma crypticum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="crypticum">Stenamma crypticum</taxonomicName>
, but considering all of the variation among populations, the easiest way to identify species is with geography.
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
occurs from the southwestern U.S.A to Oaxaca, where it is found only in the drier, interior of the state. In eastern Mexico, the species is found from Tamaulipas to Puebla, with no records from Veracruz.
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma connectum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="connectum">Stenamma connectum</taxonomicName>
is found in Veracruz, Mexico and on the wetter, Caribbean slope of Oaxaca.
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma crypticum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="crypticum">Stenamma crypticum</taxonomicName>
occurs mainly from Chiapas, Mexico to Nicaragua. However, as noted above under both
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma crypticum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="crypticum">Stenamma crypticum</taxonomicName>
and
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma connectum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="connectum">Stenamma connectum</taxonomicName>
, a few putative
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma crypticum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="crypticum">Stenamma crypticum</taxonomicName>
specimens are known from one sample taken in Veracruz, nearly in sympatry with
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma connectum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="connectum">Stenamma connectum</taxonomicName>
. If confirmed, this latter case is the only evidence of sympatry among any of these similar-looking species.
</paragraph>
<paragraph pageId="100" pageNumber="101">
Within the
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
complex there is considerable variation among populations. To help in the identification of
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
, and to aid future taxonomic efforts, I describe several
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
variants below.One observation about variation within the complex is that specimens from western and central Mexico, where it is drier, tend to look more like the type population. Specimens from the eastern slope, where it is wetter, become smoother and more aberrant, in general. The most problematic areas are in central Mexico where it transitions from wet to dry. At these localities I find specimens with intermediate features. This is one of the main reasons I have lumped what seem like very different populations together.
</paragraph>
<paragraph lastPageId="101" lastPageNumber="102" pageId="100" pageNumber="101">
The main features of the type form of
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
are indicated in the species description above (see parenthetical comments). The key characters for the type form are sculpturing and the shape of the petiole. The head is completely sculptured and mostly rugoreticulate-punctate, with some longitudinal carinulae along the midline. The pronotum is lightly carinulate-punctate (longitudinal orientation), with small smooth patches on the dorsum. One characteristic unseen by
<bibRefCitation author="Smith, MR" journalOrPublisher="American Midland Naturalist" pageId="228" pageNumber="229" pagination="133 - 174" title="Revision of the genus Stenamma Westwood in America north of Mexico (Hymenoptera, Formicidae)." url="10.2307/2422528" volume="57" year="1957">Smith (1957)</bibRefCitation>
or
<bibRefCitation author="Snelling, RR" journalOrPublisher="Contributions in Science (Los Angeles)" pageId="228" pageNumber="229" pagination="1 - 38" title="Studies on California ants 7. The genus Stenamma (Hymenoptera: Formicidae)." volume="245" year="1973">Snelling (1973)</bibRefCitation>
is that some specimens of
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="100" pageNumber="101" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
from the southwestern U.S.A. have the first gastral tergite and sternite punctate. I treat this as intraspecific variation as no other characters within these specimens vary significantly. The petiole of the type form has a distinctive shape, shared by several of the variants. It is rather short in length, but with a tall vertically projecting node that is roughly symmetrical in profile. Also, the venter of the petiole usually has a distinct sinuosity that often includes a small anteroventral process. A peculiarity I have noticed among worker specimens from Ari
<pageBreakToken pageId="101" pageNumber="102" start="start">zona</pageBreakToken>
is that they vary significantly in size, with some appearing to have allometrically enlarged heads.
</paragraph>
<paragraph pageId="101" pageNumber="102">
Variant 1 (Figure 93
<normalizedToken originalValue="AC">A-C</normalizedToken>
) was collected in Sinaloa, Mexico. It is very similar to the type form except as follows: promesonotum more domed; pronotal dorsum strongly carinulate, without punctae.
</paragraph>
<paragraph pageId="101" pageNumber="102">
Variant 2 (Figure 93
<normalizedToken originalValue="DF">D-F</normalizedToken>
) was collected from
<normalizedToken originalValue="Volcán">Volcan</normalizedToken>
de Tequila in Jalisco, Mexico. It is similar to the type form except as follows: pronotum mostly smooth; petiolar node in profile broader; petiolar venter in profile straight, not sinuous.
</paragraph>
<paragraph pageId="101" pageNumber="102">
Variant 3 (Figure 93
<normalizedToken originalValue="GI">G-I</normalizedToken>
) is from the drier portion of Oaxaca (
<normalizedToken originalValue="Asunción">Asuncion</normalizedToken>
Nochixtlan). It varies from the type form as follows: promesonotum distinctly domed and mostly smooth; petiolar node broader, more robust; face sculpture reduced, with posterior margin becoming smooth, and rugoreticulae less visible. Similar-looking specimens also occur in Mexico state (Temascaltepec).
</paragraph>
<paragraph pageId="101" pageNumber="102">
Variant 4 (Figure 93
<normalizedToken originalValue="JL">J-L</normalizedToken>
) is from another site in Oaxaca (10.6km N Jct 190/135). It varies from the type as follows: promesonotum in profile low-domed and appearing very long, with the anterior face sloping gently into the metanotal groove; pronotum with many longitudinal carinulae around humeri, and a few on dorsum; gastral pilosity longer.
</paragraph>
<paragraph pageId="101" pageNumber="102">
Variant 5 (Figure 94
<normalizedToken originalValue="AC">A-C</normalizedToken>
) is a wet forest version of
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="101" pageNumber="102" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
. It occurs at several sites on the eastern slope of the mountains in
<normalizedToken originalValue="Querétaro">Queretaro</normalizedToken>
. There are similar looking specimens from San Luis
<normalizedToken originalValue="Potosí">Potosi</normalizedToken>
and Hidalgo states. It differs from the type population as follows: overal body size smaller; face sculpture reduced, with posterior
<normalizedToken originalValue="¼">1/4</normalizedToken>
or less of head smooth, remaining sculpture consisting of fine punctae, carinulae, and rugoreticulae; pronotum and dorsum of mesonotum smooth; promesonotum in profile variable, sometimes more flat, with posterior face merging smoothly into metanotum, sometimes more distinctly domed; petiolar node in profile narrow, appearing anteroposteriorly compressed. The specimens with a more domed promesonotum appear intermediate with variant 6.
</paragraph>
<paragraph pageId="102" pageNumber="103">
<pageBreakToken pageId="102" pageNumber="103" start="start">Variant</pageBreakToken>
6 (Figure 94
<normalizedToken originalValue="DF">D-F</normalizedToken>
) is another wet forest version of
<taxonomicName class="Insecta" family="Formicidae" genus="Stenamma" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stenamma huachucanum" order="Hymenoptera" pageId="102" pageNumber="103" phylum="Arthropoda" rank="species" species="huachucanum">Stenamma huachucanum</taxonomicName>
. It occurs throughout the El Cielo reserve in Tamaulipas, Mexico, and differs from variant 5 as follows: head more robust, slightly broader, with posterior margin distinctly depressed medially; promesonotum domed, only slightly asymmetrical; propodeal spines forming well-developed, blunt tubercles; outline of propodeum in profile sinuous, with propodeal spine and lobe smoothly connected; petiole appearing elongate; petiolar node small, with a rounded dorsum that points distinctly posteriad.
</paragraph>
</subSubSection>
<subSubSection lastPageId="103" lastPageNumber="104" pageId="102" pageNumber="103" type="material examined">
<paragraph pageId="102" pageNumber="103">Material examined.</paragraph>
<paragraph lastPageId="103" lastPageNumber="104" pageId="102" pageNumber="103">
<normalizedToken originalValue="MÉXICO">MEXICO</normalizedToken>
: Coahuila:
<normalizedToken originalValue="Hway">H'way</normalizedToken>
57, pass 25km E Saltillo, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="25.436">25.436°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-100.806">100.806°W</geoCoordinate>
], 11 Aug 1965 (Cornell Univ. Mexico Field Party); Hidalgo: 6.4km SW
<normalizedToken originalValue="Chapulhuacán">Chapulhuacan</normalizedToken>
, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="21.155">21.155°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-98.931">98.931°W</geoCoordinate>
], 1070m, 27
<normalizedToken originalValue="Jun">Jun-</normalizedToken>
1 Jul 1973 (A. F. Newton);11km SW
<normalizedToken originalValue="Chapulhuacán">Chapulhuacan</normalizedToken>
, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="21.147">21.147°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-98.966">98.966°W</geoCoordinate>
], 1200m, 5 Jul 1976 (A. F. Newton); 18km NE Jacala, nr El Alamo, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="21.058">21.058°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-99.052">99.052°W</geoCoordinate>
], 1700m, 10 Jun 1988 (S. &amp; J. Peck); 16km NE Rancho Viejo, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="555" value="21.07">21.07°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="555" value="-99.02">99.02°W</geoCoordinate>
], 1550m, 5 Jul 1976 (A. F. Newton); Tlanchinol, 43km SW Huejutla, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="20.988">20.988°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-98.662">98.662°W</geoCoordinate>
], 1 Aug 1983 (S. &amp; J. Peck); 4-6km N Tlanchinol, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="21.026">21.026°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-98.644">98.644°W</geoCoordinate>
], 1590m, 6-11 Jul 1973 (A. F. Newton);Jalisco:
<normalizedToken originalValue="Volcán">Volcan</normalizedToken>
de Tequila,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="20.82517">20.82517°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-103.85509">103.85509°W</geoCoordinate>
, 1840m, 26 Aug 2009 (M. G. Branstetter);
<normalizedToken originalValue="Volcán">Volcan</normalizedToken>
de Tequila,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="20.79293">20.79293°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-103.85388">103.85388°W</geoCoordinate>
, 2660m, 26 Aug 2009 (M. G. Branstetter);
<normalizedToken originalValue="México">Mexico</normalizedToken>
: 1.6km E Ixtapan de la Sal, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="555" value="18.85">18.85°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="555" value="-99.67">99.67°W</geoCoordinate>
], 1890m, 10 Aug 1973 (A. F. Newton); 4.8km NE Temascaltepec, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="555" value="19.05">19.05°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="555" value="-100.03">100.03°W</geoCoordinate>
], 1920m, 14 Sep 1973 (A. F. Newton); 11km NE Temascaltepec, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="19.096">19.096°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-99.983">99.983°W</geoCoordinate>
], 2100m, 21-15 Sep 1973 (A. F. Newton); 3.2km NE Tenancingo, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="18.985">18.985°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-99.575">99.575°W</geoCoordinate>
], 2160m, 11 Sep 1973 (A. F. Newton); Oaxaca: 9.4km SE
<normalizedToken originalValue="Asunción">Asuncion</normalizedToken>
Nochixtlan,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="17.37632">17.37632°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-97.19976">97.19976°W</geoCoordinate>
, 2240m, 10 Aug 2009 (M. G. Branstetter); 10.6km N Jct 190/135 (on 135), [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="17.282">17.282°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-96.929">96.929°W</geoCoordinate>
], 1920m, 21 Jul 1987 (R. S. Anderson); 14km NE Oaxaca, km 10 Mex. 175, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="17.145">17.145°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-96.622">96.622°W</geoCoordinate>
], 1890m, 20 Aug 1973 (A. F. Newton); Puebla: 2.7km S Apulco, nr Zacapoaxtla, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="19.911">19.911°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-97.606">97.606°W</geoCoordinate>
], 22 Jul 1987 (R. S. Anderson); 7.6km SW La Cumbre, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="5" value="20.1416">20.1416°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="5" value="-98.0217">98.0217°W</geoCoordinate>
], 1585m, 23 Jul 1987 (R. S. Anderson);
<normalizedToken originalValue="Hway">H'way</normalizedToken>
190, E
<normalizedToken originalValue="Río">Rio</normalizedToken>
<normalizedToken originalValue="Frío">Frio</normalizedToken>
[ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="19.31">19.310°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-98.638">98.638°W</geoCoordinate>
], 2900m, 7 Aug 1965 (Cornell Univ. Mexico Field Party); 2km NE Teziutlan, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="19.892">19.892°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-97.296">97.296°W</geoCoordinate>
], 1220m, 19 Jun 1983 (S. &amp; J. Peck); 24km N Xicotepec de Juarez, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="20.282">20.282°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-97.963">97.963°W</geoCoordinate>
], 1070m, 17 Jun 1983 (R. S. Anderson);
<normalizedToken originalValue="Querétaro">Queretaro</normalizedToken>
: Cerro Zamorano,
<geoCoordinate direction="north" orientation="latitude" precision="5" value="20.9328">20.9328°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="5" value="-100.184">100.1840°W</geoCoordinate>
, 2770m, 26 Jul 2006 (R. S. Anderson); 29km E Landa de Matamoros, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="555" value="21.27">21.27°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="555" value="-99.16">99.16°W</geoCoordinate>
], 1600m, 14 Jul 1969 (S. &amp; J. Peck); 40km E Landa de Matamoros, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="21.297">21.297°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-99.09">99.090°W</geoCoordinate>
], 1520m, 14 Jul 1969 (S. &amp; J. Peck); 4.6km SW Pinal de Amoles,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="21.16479">21.16479°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-99.59419">99.59419°W</geoCoordinate>
, 1960m, 18 Aug 2009 (M. G. Branstetter); 1.9km NE Pinal de Amoles,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="21.14974">21.14974°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-99.61576">99.61576°W</geoCoordinate>
, 2250m, 18 Aug 2009 (M. G. Branstetter); 7km NE Pinal de Amoles,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="21.17601">21.17601°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-99.57341">99.57341°W</geoCoordinate>
, 1700m, 18 Aug 2009 (M. G. Branstetter); San Luis
<normalizedToken originalValue="Potosí">Potosi</normalizedToken>
: Taman, 20km SW Tamazunchale, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="21.153">21.153°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-98.947">98.947°W</geoCoordinate>
], 11 Jun 1983 (S. &amp; J. Peck); 20km33/ W Xilitla, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="21.293">21.293°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-99.194">99.194°W</geoCoordinate>
], 1600m, 12 Jun 1983 (S. &amp; J. Peck); 22.5km W Xilitla, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="21.3">21.300°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-99.086">99.086°W</geoCoordinate>
], 1460m, 29 Jun 1973 (A. F.
<pageBreakToken pageId="103" pageNumber="104" start="start">Newton</pageBreakToken>
);40km W Xilitla, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="21.259">21.259°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-99.194">99.194°W</geoCoordinate>
], 1700m, 6 Aug 1983 (S. &amp; J. Peck); Sinaloa: 1.7km NNE El Palmito,
<geoCoordinate direction="north" orientation="latitude" precision="5" value="23.5783">23.5783°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-105.835">105.835°W</geoCoordinate>
, 2100m, 15 Jan 2007 (P. S. Ward); Tamaulipas: El Cielo, 1.2km SE Alta Cima,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="23.05005">23.05005°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-99.19226">99.19226°W</geoCoordinate>
, 920m, 24 Aug 2009 (M. G. Branstetter); El Cielo, 1.8km W Alta Cima,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="23.0611">23.06110°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-99.21564">99.21564°W</geoCoordinate>
, 1340m, 23 Aug 2009 (M. G. Branstetter); El Cielo, 1.8km NW La Gloria,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="23.05871">23.05871°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-99.26543">99.26543°W</geoCoordinate>
, 2030m, 23 Aug 2009 (M. G. Branstetter); 0.8km N Conrado Castillo, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="23.491">23.491°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-99.308">99.308°W</geoCoordinate>
], 4 Sep 1970 (W. Elliott); U.S.A.:Arizona: Cochise Co.: Carr Canyon, 11.6km from jct. 92, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="31.428">31.428°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="555" value="-110.29">110.29°W</geoCoordinate>
], 2195m, 17 Aug 2002 (Cover &amp; Deyrup); Hd. Carr Canyon, Huachuca Mts., [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="31.432">31.432°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-110.284">110.284°W</geoCoordinate>
], 2440m, 24 Jul 1950 (W. S. Creighton); Chiricahua Mts, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="31.829">31.829°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-109.267">109.267°W</geoCoordinate>
], 2 Aug 1954 (A. C. Cole); Chiricahua Mts, trail to Barfoot Lookout from rd., [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="31.829">31.829°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-109.267">109.267°W</geoCoordinate>
], 2560m, 26 Jun 1987 (S. P. Cover); Chiricahua Mtns, 8km WSW Portal,
<geoCoordinate direction="north" orientation="latitude" precision="55" value="31.883">31.883°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-109.217">109.217°W</geoCoordinate>
, 1710m, 12 Aug 2002 (P. S. Ward); Chiricahua Mtns., 11.9km 260°W Portal,
<geoCoordinate direction="north" orientation="latitude" precision="55" value="31.917">31.917°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-109.267">109.267°W</geoCoordinate>
, 2440m, 11 Aug 2003 (P. S. Ward); Chiricahua Mtns., W Turkey Creek, 20km 244° WSW Portal,
<geoCoordinate direction="north" orientation="latitude" precision="55" value="31.867">31.867°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-109.35">109.350°W</geoCoordinate>
, 1800m, 13 Aug 2002 (P. S. Ward); Sunnyside Canyon, 5.1km SE jct. FSR48 on FSR227, [ca.
<geoCoordinate direction="north" orientation="latitude" precision="55" value="31.437">31.437°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-110.401">110.401°W</geoCoordinate>
], 1810m, 18 Aug 2002 (Cover &amp; Deyrup); New Mexico: Bernanillo Co.: 15km E Alameda,
<geoCoordinate direction="north" orientation="latitude" precision="55" value="35.2">35.200°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="55" value="-106.483">106.483°W</geoCoordinate>
, 1950m, 14 Aug 1997 (P. S. Ward).
</paragraph>
</subSubSection>
</treatment>
</document>