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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.667.10716" ID-GBIF-Dataset="c2ffd9e3-afca-4942-9d2c-59758231b258" ID-PMC="PMC5523388" ID-Pensoft-Pub="1313-2970-667-95" ID-PubMed="28769637" ID-ZBK="648D539FD99443188CD23F183172350C" ModsDocAuthor="" ModsDocDate="2017" ModsDocID="1313-2970-667-95" ModsDocOrigin="ZooKeys 667" ModsDocTitle="Phylogeny of the genus Yumtaax Boucher (Coleoptera, Passalidae, Proculini): Taxonomic and evolutionary implications with descriptions of three new species" checkinTime="1491908628330" checkinUser="pensoft" docAuthor="Beza-Beza, Cristian Fernando, Beck, James, Reyes-Castillo, Pedro &amp; Jameson, Mary Liz" docDate="2017" docId="385FBECB08663C4BEEE012E7CD2C509B" docLanguage="en" docName="ZooKeys 667: 95-129" docOrigin="ZooKeys 667" docSource="http://dx.doi.org/10.3897/zookeys.667.10716" docTitle="Yumtaax jimenezi Beza-Beza, Reyes-Castillo &amp; Jameson, sp. n." docType="treatment" docUuid="C8313A69-5326-49BF-829B-53343207F53E" docUuidSource="ZooBank" docVersion="5" lastPageNumber="122" masterDocId="FF884937582ECA1CFFB79255C20EAF35" masterDocTitle="Phylogeny of the genus Yumtaax Boucher (Coleoptera, Passalidae, Proculini): Taxonomic and evolutionary implications with descriptions of three new species" masterLastPageNumber="129" masterPageNumber="95" pageNumber="119" updateTime="1668164390172" updateUser="ExternalLinkService">
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<mods:titleInfo>
<mods:title>Phylogeny of the genus Yumtaax Boucher (Coleoptera, Passalidae, Proculini): Taxonomic and evolutionary implications with descriptions of three new species</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Beza-Beza, Cristian Fernando</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Beck, James</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Reyes-Castillo, Pedro</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Jameson, Mary Liz</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>ZooKeys</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2017</mods:date>
<mods:detail type="volume">
<mods:number>667</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>95</mods:start>
<mods:end>129</mods:end>
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<mods:location>
<mods:url>http://dx.doi.org/10.3897/zookeys.667.10716</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.667.10716</mods:identifier>
<mods:identifier type="Pensoft-Pub">1313-2970-667-95</mods:identifier>
<mods:identifier type="ZBK">648D539FD99443188CD23F183172350C</mods:identifier>
<mods:identifier type="ZooBank">648D539FD99443188CD23F183172350C</mods:identifier>
</mods:mods>
<treatment ID-GBIF-Taxon="128345063" LSID="urn:lsid:zoobank.org:act:C8313A69-5326-49BF-829B-53343207F53E" httpUri="http://treatment.plazi.org/id/385FBECB08663C4BEEE012E7CD2C509B" lastPageId="27" lastPageNumber="122" pageId="24" pageNumber="119">
<subSubSection pageId="24" pageNumber="119" type="nomenclature">
<paragraph pageId="24" pageNumber="119">
<taxonomicName LSID="http://zoobank.org/C8313A69-5326-49BF-829B-53343207F53E" authority="Beza-Beza, Reyes-Castillo &amp; Jameson" class="Insecta" family="Passalidae" genus="Yumtaax" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Yumtaax jimenezi" order="Coleoptera" pageId="24" pageNumber="119" phylum="Arthropoda" rank="species" species="jimenezi">Yumtaax jimenezi Beza-Beza, Reyes-Castillo &amp; Jameson</taxonomicName>
<taxonomicNameLabel pageId="24" pageNumber="119">sp. n.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection pageId="24" pageNumber="119" type="materials_examined">
<paragraph pageId="24" pageNumber="119">Material examined.</paragraph>
<paragraph pageId="24" pageNumber="119">27 type specimens.</paragraph>
<paragraph pageId="24" pageNumber="119">
Holotype ♂. MEXICO: Veracruz, Calcahualco, Tecuanapa. Bosque
<normalizedToken originalValue="mesófilo">mesofilo</normalizedToken>
, alt. 2400 m V-2/3-1992 (
<normalizedToken originalValue="Capistrán">Capistran</normalizedToken>
and Delgado) (IEXA).
</paragraph>
<paragraph pageId="24" pageNumber="119">
Paratypes (26 total). MEXICO: Veracruz: 10 ♀, 15 unknown sex, Calcahualco, Tecuanapa, bosque
<normalizedToken originalValue="mesófilo">mesofilo</normalizedToken>
, alt. 2400 m, V-2/3-1992 (
<normalizedToken originalValue="Capistrán">Capistran</normalizedToken>
and Delgado). 5 ♂, 8 ♀, 34 sex unknown, Calcahualco, Tecuanapa, bosque
<normalizedToken originalValue="mesófilo">mesofilo</normalizedToken>
, alt. 2400 m, V-1992 (
<normalizedToken originalValue="Capistrán">Capistran</normalizedToken>
and Delgado). 14 ♀, Calcahualco, Tecuanapa, bosque
<normalizedToken originalValue="mesófilo">mesofilo</normalizedToken>
, alt. 2200 m, VI-1992 (
<normalizedToken originalValue="Capistrán">Capistran</normalizedToken>
and Delgado). 1 ♂, Calcahualco, Dos Caminos, II-29-1992, alt. 1415 m, bosque de encino-pino, dentro de
<taxonomicName class="Magnoliopsida" family="Fagaceae" genus="Quercus" higherTaxonomySource="CoL" kingdom="Plantae" lsidName="Quercus" order="Fagales" pageId="24" pageNumber="119" phylum="Tracheophyta" rank="genus">Quercus</taxonomicName>
sp. (R. Novelo, F.
<normalizedToken originalValue="Capistrán">Capistran</normalizedToken>
and L. Delgado). 1 ♀, 2 sex unknown, Calcahualco, Nueva
<normalizedToken originalValue="Vaquería">Vaqueria</normalizedToken>
(1 km before), II-28-1992, alt. 2700 m, bosque de pino-encino, en tronco (R. Novelo, F.
<normalizedToken originalValue="Capistrán">Capistran</normalizedToken>
and L. Delgado). 2 ♀, Veracruz, Calcahualco, 1 km antes de Nueva
<normalizedToken originalValue="Vaquería">Vaqueria</normalizedToken>
, 2700 m, VI-1992, (L. Delgado and
<normalizedToken originalValue="Capistrán">Capistran</normalizedToken>
) (CFBB, IEXA). 1 ♂, Cosautlan, Los Laureles, alt. 2680 m, VIII-27-1999 (J. P. Lumaret). 4 sex unknown, Orizaba,
<normalizedToken originalValue="Sallé">Salle</normalizedToken>
, Mex. Collection (
<normalizedToken originalValue="Sallé">Salle</normalizedToken>
) (BMNH). 1 sex unknown, Mexico (Truqui) (BMNH).
</paragraph>
</subSubSection>
<subSubSection pageId="24" pageNumber="119" type="diagnosis">
<paragraph pageId="24" pageNumber="119">Diagnosis.</paragraph>
<paragraph pageId="24" pageNumber="119">
<taxonomicName class="Insecta" family="Passalidae" genus="Yumtaax" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Yumtaax jimenezi" order="Coleoptera" pageId="24" pageNumber="119" phylum="Arthropoda" rank="species" species="jimenezi">Yumtaax jimenezi</taxonomicName>
is a small (18.5-23.0 mm) macropterous species, and it is part of the
<taxonomicName lsidName="Y. laticornis" pageId="24" pageNumber="119" rank="species" species="laticornis">Y. laticornis</taxonomicName>
clade (=Fig. 4). This species is diagnosed by the following character combination: clypeus is inclined (shared with
<taxonomicName lsidName="Y. recticornis" pageId="24" pageNumber="119" rank="species" species="recticornis">Y. recticornis</taxonomicName>
,
<taxonomicName lsidName="Y. imbellis" pageId="24" pageNumber="119" rank="species" species="imbellis">Y. imbellis</taxonomicName>
,
<taxonomicName lsidName="Y. mazatecus" pageId="24" pageNumber="119" rank="species" species="mazatecus">Y. mazatecus</taxonomicName>
,
<taxonomicName lsidName="Y. nebulosus" pageId="24" pageNumber="119" rank="species" species="nebulosus">Y. nebulosus</taxonomicName>
,
<taxonomicName lsidName="Y. olmecae" pageId="24" pageNumber="119" rank="species" species="olmecae">Y. olmecae</taxonomicName>
; vertical in
<taxonomicName lsidName="Y. laticornis" pageId="24" pageNumber="119" rank="species" species="laticornis">Y. laticornis</taxonomicName>
,
<taxonomicName lsidName="Y. cameliae" pageId="24" pageNumber="119" rank="species" species="cameliae">Y. cameliae</taxonomicName>
,
<taxonomicName lsidName="Y. veracrucensis" pageId="24" pageNumber="119" rank="species" species="veracrucensis">Y. veracrucensis</taxonomicName>
) and with the anterior border straight (shared with other members of
<taxonomicName class="Insecta" family="Passalidae" genus="Yumtaax" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Yumtaax" order="Coleoptera" pageId="24" pageNumber="119" phylum="Arthropoda" rank="genus">Yumtaax</taxonomicName>
except for
<taxonomicName lsidName="Y. recticornis" pageId="24" pageNumber="119" rank="species" species="recticornis">Y. recticornis</taxonomicName>
and
<taxonomicName lsidName="Y. olmecae" pageId="24" pageNumber="119" rank="species" species="olmecae">Y. olmecae</taxonomicName>
that have the anterior border of clypeus concave); MFS of the
<normalizedToken originalValue="“falsus”">&quot;falsus&quot;</normalizedToken>
type (see
<bibRefCitation pageId="24" pageNumber="119">Reyes-Castillo 1970</bibRefCitation>
) (shared with all members of
<taxonomicName class="Insecta" family="Passalidae" genus="Yumtaax" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Yumtaax" order="Coleoptera" pageId="24" pageNumber="119" phylum="Arthropoda" rank="genus">Yumtaax</taxonomicName>
except
<taxonomicName lsidName="Y. cameliae" pageId="24" pageNumber="119" rank="species" species="cameliae">Y. cameliae</taxonomicName>
which has the MFS of the
<normalizedToken originalValue="“striatopunctatus”">&quot;striatopunctatus&quot;</normalizedToken>
type), with the central tooth that is not free (fused with frontal ridges) (shared with
<taxonomicName lsidName="Y. imbellis" pageId="24" pageNumber="119" rank="species" species="imbellis">Y. imbellis</taxonomicName>
,
<taxonomicName lsidName="Y. nebulosus" pageId="24" pageNumber="119" rank="species" species="nebulosus">Y. nebulosus</taxonomicName>
,
<taxonomicName lsidName="Y. olmecae" pageId="24" pageNumber="119" rank="species" species="olmecae">Y. olmecae</taxonomicName>
; largely free in
<taxonomicName lsidName="Y. recticornis" pageId="24" pageNumber="119" rank="species" species="recticornis">Y. recticornis</taxonomicName>
,
<taxonomicName lsidName="Y. veracrucensis" pageId="24" pageNumber="119" rank="species" species="veracrucensis">Y. veracrucensis</taxonomicName>
,
<taxonomicName lsidName="Y. laticornis" pageId="24" pageNumber="119" rank="species" species="laticornis">Y. laticornis</taxonomicName>
,
<taxonomicName lsidName="Y. cameliae" pageId="24" pageNumber="119" rank="species" species="cameliae">Y. cameliae</taxonomicName>
,
<taxonomicName lsidName="Y. mazatecus" pageId="24" pageNumber="119" rank="species" species="mazatecus">Y. mazatecus</taxonomicName>
), directed dorsally and anteriorly (shared with
<taxonomicName lsidName="Y. mazatecus" pageId="24" pageNumber="119" rank="species" species="mazatecus">Y. mazatecus</taxonomicName>
, directed dorsally
<taxonomicName lsidName="Y. recticornis" pageId="24" pageNumber="119" rank="species" species="recticornis">Y. recticornis</taxonomicName>
,
<taxonomicName lsidName="Y. imbellis" pageId="24" pageNumber="119" rank="species" species="imbellis">Y. imbellis</taxonomicName>
,
<taxonomicName lsidName="Y. nebulosus" pageId="24" pageNumber="119" rank="species" species="nebulosus">Y. nebulosus</taxonomicName>
,
<taxonomicName lsidName="Y. olmecae" pageId="24" pageNumber="119" rank="species" species="olmecae">Y. olmecae</taxonomicName>
; directed anteriorly in
<taxonomicName lsidName="Y. veracrucensis" pageId="24" pageNumber="119" rank="species" species="veracrucensis">Y. veracrucensis</taxonomicName>
,
<taxonomicName lsidName="Y. laticornis" pageId="24" pageNumber="119" rank="species" species="laticornis">Y. laticornis</taxonomicName>
; elevated in the posterior half bending abruptly forward in the anterior half in
<taxonomicName lsidName="Y. cameliae" pageId="24" pageNumber="119" rank="species" species="cameliae">Y. cameliae</taxonomicName>
), and not reaching the clypeus (shared with
<taxonomicName lsidName="Y. recticornis" pageId="24" pageNumber="119" rank="species" species="recticornis">Y. recticornis</taxonomicName>
,
<taxonomicName lsidName="Y. imbellis" pageId="24" pageNumber="119" rank="species" species="imbellis">Y. imbellis</taxonomicName>
,
<taxonomicName lsidName="Y. mazatecus" pageId="24" pageNumber="119" rank="species" species="mazatecus">Y. mazatecus</taxonomicName>
,
<taxonomicName lsidName="Y. nebulosus" pageId="24" pageNumber="119" rank="species" species="nebulosus">Y. nebulosus</taxonomicName>
,
<taxonomicName lsidName="Y. olmecae" pageId="24" pageNumber="119" rank="species" species="olmecae">Y. olmecae</taxonomicName>
; reaching the clypeus in
<taxonomicName lsidName="Y. laticornis" pageId="24" pageNumber="119" rank="species" species="laticornis">Y. laticornis</taxonomicName>
,
<taxonomicName lsidName="Y. cameliae" pageId="24" pageNumber="119" rank="species" species="cameliae">Y. cameliae</taxonomicName>
,
<taxonomicName lsidName="Y. veracrucensis" pageId="24" pageNumber="119" rank="species" species="veracrucensis">Y. veracrucensis</taxonomicName>
); and moderately reduced eyes (shared with
<taxonomicName lsidName="Y. veracrucensis" pageId="24" pageNumber="119" rank="species" species="veracrucensis">Y. veracrucensis</taxonomicName>
,
<taxonomicName lsidName="Y. cameliae" pageId="24" pageNumber="119" rank="species" species="cameliae">Y. cameliae</taxonomicName>
,
<taxonomicName lsidName="Y. nebulosus" pageId="24" pageNumber="119" rank="species" species="nebulosus">Y. nebulosus</taxonomicName>
,
<taxonomicName lsidName="Y. olmecae" pageId="24" pageNumber="119" rank="species" species="olmecae">Y. olmecae</taxonomicName>
; large in
<taxonomicName lsidName="Y. recticornis" pageId="24" pageNumber="119" rank="species" species="recticornis">Y. recticornis</taxonomicName>
,
<taxonomicName lsidName="Y. imbellis" pageId="24" pageNumber="119" rank="species" species="imbellis">Y. imbellis</taxonomicName>
; strongly reduced in
<taxonomicName lsidName="Y. laticornis" pageId="24" pageNumber="119" rank="species" species="laticornis">Y. laticornis</taxonomicName>
,
<taxonomicName lsidName="Y. mazatecus" pageId="24" pageNumber="119" rank="species" species="mazatecus">Y. mazatecus</taxonomicName>
).
</paragraph>
</subSubSection>
<subSubSection pageId="25" pageNumber="120" type="description">
<paragraph pageId="25" pageNumber="120">
<pageBreakToken pageId="25" pageNumber="120" start="start">Dimensions</pageBreakToken>
</paragraph>
<paragraph pageId="25" pageNumber="120">
(mm) (n = 12). Total length 18.5-23.0, (
<normalizedToken originalValue="χ">x</normalizedToken>
= 20.5); elytral length 11.5-14.0, (
<normalizedToken originalValue="χ">x</normalizedToken>
= 12.5); pronotal length 4.0-6.0, (
<normalizedToken originalValue="χ">x</normalizedToken>
= 5.5); pronotal width 5.5-7.0, (
<normalizedToken originalValue="χ">x</normalizedToken>
= 6.5); humeral width 5.5-7.0, (
<normalizedToken originalValue="χ">x</normalizedToken>
= 6.5).
</paragraph>
</subSubSection>
<subSubSection lastPageId="26" lastPageNumber="121" pageId="25" pageNumber="120" type="description">
<paragraph pageId="25" pageNumber="120">Description of holotype</paragraph>
<paragraph lastPageId="26" lastPageNumber="121" pageId="25" pageNumber="120">
(Fig. 9). Head (Fig. 9C). Labrum: anterior border concave, dorsal surface smooth and glabrous medially, and punctate and setose in the apicolaterally, apically, and basally; anterior edge excavated. Clypeus: inclined, rectangular, shiny, and smooth. Frontoclypeal suture: straight, and shiny. External tubercles rounded and directed dorsally. Frontal area: inclined, smooth, and shiny, frontal ridges present finishing in inner tubercles. Frontal fossae: punctate and setose. Mesofrontal
<pageBreakToken pageId="26" pageNumber="121" start="start">structure</pageBreakToken>
(MFS): of the
<normalizedToken originalValue="“falsus”">&quot;falsus&quot;</normalizedToken>
type (see
<bibRefCitation pageId="26" pageNumber="121">Reyes-Castillo 1970</bibRefCitation>
); base subparallel and narrower than the
<normalizedToken originalValue="MFS">MFS'</normalizedToken>
lateral ridge; center horn short with apex rounded, not free (fused with frontal ridges) and directing dorsally (Fig. 9D), not reaching the posterior margin of clypeus (Fig. 9C, D), dorsally without micro-punctures; base of the center horn narrow not narrowing down along its length (central tooth tubercle like shape [Fig. 9C, D]); dorsal fossa present at the base of MFS. Occipital fossa: shallow posteriorly and deeper laterally not connected to frontal fossae. Posterior occipital sulcus sinuate. Supraorbital ridge: bituberculate, tubercles of similar size; posterior half of supraorbital ridge not bifurcated. Canthus: with apex rounded covering less than 1/3 of the eye, expanded distally. Eyes: reduced (distal edge of the eye more or less at the distal edge of the canthus), width = 0.5 mm (each eye). Head width = 3.5 mm. Ratio of sums of both eyes widths/total head width = 0.24; postocular area punctate and setose. Ligula: tridentate, with central tooth surpassing apex of lateral teeth, lateral teeth rounded; setose punctures present in discal area; posterior border convex. Mentum: lateral lobes rounded and wide, with setose punctures. Basomedial portion protruding ventrally; anterior border at middle convex; basal fossae absent. Hypostomal process: without lateral depression; separated from mentum by a distance shorter than the wide of the anterior width of hypostomal process. Infraocular ridge absent. Mandible: with 3 apical teeth; internal tooth of left mandible bidentate; dorsal tooth occupies less than half length of the mandible. Pronotum: anterior angles rounded. Anterior fossae of marginal sulcus impunctate. Lateral fossae with heavy punctures. Marginal groove lacking punctures. Prosternum: opaque. Prosternellum anterior half opaque and lateral edges and posterior half shiny. Scutellum: smooth and glabrous. Mesosternum: with anterolateral areas opaque. Metasternum: with setae in anterolaterally, without punctures in lateral margins of metasternum disc. Lateral fossae wide across the metathorax, with setose punctures. Elytra: anterior border straight. Meeting point of striae 1-10 (see
<bibRefCitation pageId="26" pageNumber="121">Reyes-Castillo 1970</bibRefCitation>
) with one line of punctures. Wings: well developed. Legs: femur I with longitudinal anteroventral groove weakly developed in the proximal half and strongly developed on the distal end of the femur, posteroventral half pubescent; setae long, sparse, reddish. Abdomen: last sternite with marginal groove complete (Fig. 9B). Aedeagus (Fig. 9E, F, G): in dorsal view phallus globose (wider than long). In ventral view distal edges of phallus surpassing the distal edge of the parameres.
</paragraph>
</subSubSection>
<subSubSection pageId="26" pageNumber="121" type="variation">
<paragraph pageId="26" pageNumber="121">Variation.</paragraph>
<paragraph pageId="26" pageNumber="121">Frontoclypeal suture can be from opaque to shiny; internal tubercles from strongly to weakly marked but always present; ratio of eyes and head with varies from 0.18-0.32; supraocular ridge from weak to absent; hypostomal process with weak lateral depression to lateral depression absent; prosternellum varies from anterior half opaque and lateral edges and posterior half shiny to anterior half and lateral edges opaque and posterior half and middle shiny to completely opaque; femur I longitudinal anterior-ventral groove from weak in the proximal half to absent; femur I longitudinal anterior-ventral groove from strongly developed in the distal half to absent.</paragraph>
</subSubSection>
<subSubSection pageId="26" pageNumber="121" type="etymology">
<paragraph pageId="26" pageNumber="121">Etymology.</paragraph>
<paragraph pageId="26" pageNumber="121">
This species is named in honor of
<taxonomicName family="Passalidae" lsidName="" pageId="26" pageNumber="121" rank="family">Passalidae</taxonomicName>
worker Dr. Larry
<normalizedToken originalValue="Jiménez-Ferbans">Jimenez-Ferbans</normalizedToken>
who assisted in collecting trips supporting this study.
</paragraph>
</subSubSection>
<subSubSection pageId="27" pageNumber="122" type="distribution">
<paragraph pageId="27" pageNumber="122">
<pageBreakToken pageId="27" pageNumber="122" start="start">Distribution</pageBreakToken>
.
</paragraph>
<paragraph pageId="27" pageNumber="122">
This species is known from cloud forest (bosque
<normalizedToken originalValue="mesófilo">mesofilo</normalizedToken>
) at 2400 m elevation from the state of Veracruz, Mexico.
</paragraph>
<paragraph pageId="27" pageNumber="122">
MEXICO: Veracruz: Calcahualco (Tecuanapa, Dos Caminos, Nueva
<normalizedToken originalValue="Vaquería">Vaqueria</normalizedToken>
[1 km before]).
</paragraph>
</subSubSection>
<subSubSection pageId="27" pageNumber="122" type="remarks">
<paragraph pageId="27" pageNumber="122">Remarks.</paragraph>
<paragraph pageId="27" pageNumber="122">
<taxonomicName class="Insecta" family="Passalidae" genus="Yumtaax" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Yumtaax jimenezi" order="Coleoptera" pageId="27" pageNumber="122" phylum="Arthropoda" rank="species" species="jimenezi">Yumtaax jimenezi</taxonomicName>
is a cryptic, widespread species that has been confused with
<taxonomicName lsidName="Y. recticornis" pageId="27" pageNumber="122" rank="species" species="recticornis">Y. recticornis</taxonomicName>
. Previously,
<taxonomicName lsidName="Y. recticornis" pageId="27" pageNumber="122" rank="species" species="recticornis">Y. recticornis</taxonomicName>
s. l. was thought to be broadly distributed in Mexico from the Sierra Madre Oriental in the Mexican Transvolcanic Belt and Sierra Madre del Sur (
<bibRefCitation pageId="27" pageNumber="122">Reyes-Castillo 1970</bibRefCitation>
,
<bibRefCitation author="Castillo, C" journalOrPublisher="Acta Zoologica Mexicana (nueva serie)" pageId="29" pageNumber="124" pagination="1 - 84" title="Biosistematica del genero Petrejoides Kuwert (Coleoptera, Lamellicornia, Passalidae)." volume="4" year="1984">Castillo and Reyes-Castillo 1984</bibRefCitation>
,
<bibRefCitation author="Boucher, S" journalOrPublisher="Annale de la Societe Entomologique de France" pageId="28" pageNumber="123" pagination="237 - 604" title="Evolution et phylogenie des coleopteres Passalidae (Scarabaeoidea)." url="https://doi.org/10.1080/00379271.2005.10697444" volume="41" year="2006">Boucher 2006</bibRefCitation>
). Phylogenetic analysis (Fig. 4 and Suppl. materials 2-4) and close examination of morphology provide evidence that
<taxonomicName lsidName="Y. recticornis" pageId="27" pageNumber="122" rank="species" species="recticornis">Y. recticornis</taxonomicName>
s. l. comprises two cryptic species [
<taxonomicName lsidName="Y. recticornis" pageId="27" pageNumber="122" rank="species" species="recticornis">Y. recticornis</taxonomicName>
(=
<taxonomicName lsidName="Y. recticornis" pageId="27" pageNumber="122" rank="species" species="recticornis">Y. recticornis</taxonomicName>
OM) and
<taxonomicName lsidName="Y. jimenezi" pageId="27" pageNumber="122" rank="species" species="jimenezi">Y. jimenezi</taxonomicName>
(
<taxonomicName lsidName="Y. recticornis" pageId="27" pageNumber="122" rank="species" species="recticornis">Y. recticornis</taxonomicName>
VM)].
</paragraph>
<paragraph pageId="27" pageNumber="122">
These species are distinguished by eye size (small in
<taxonomicName lsidName="Y. jimenezi" pageId="27" pageNumber="122" rank="species" species="jimenezi">Y. jimenezi</taxonomicName>
and large in
<taxonomicName lsidName="Y. recticornis" pageId="27" pageNumber="122" rank="species" species="recticornis">Y. recticornis</taxonomicName>
), shape of the central tooth of the MFS (center horn short with apex rounded, not free [fused with frontal ridges] and directed dorsally [Fig. 9D] in
<taxonomicName lsidName="Y. jimenezi" pageId="27" pageNumber="122" rank="species" species="jimenezi">Y. jimenezi</taxonomicName>
; center horn short with apex rounded, largely free and directed anteriorly and dorsally [Fig. 5D] in
<taxonomicName lsidName="Y. recticornis" pageId="27" pageNumber="122" rank="species" species="recticornis">Y. recticornis</taxonomicName>
), and the shape of the surface of the frons and clypeus (concave in
<taxonomicName lsidName="Y. recticornis" pageId="27" pageNumber="122" rank="species" species="recticornis">Y. recticornis</taxonomicName>
versus flat in
<taxonomicName lsidName="Y. jimenezi" pageId="27" pageNumber="122" rank="species" species="jimenezi">Y. jimenezi</taxonomicName>
). Interestingly, the reduced eye size in
<taxonomicName lsidName="Y. jimenezi" pageId="27" pageNumber="122" rank="species" species="jimenezi">Y. jimenezi</taxonomicName>
results in the distal expansion of the canthus. Based on seven exemplars, phylogenetic analysis (Fig. 4) strongly supports
<taxonomicName lsidName="Y. jimenezi" pageId="27" pageNumber="122" rank="species" species="jimenezi">Y. jimenezi</taxonomicName>
as a unique lineage (1.0 PP/100 BS).
</paragraph>
<caption pageId="27" pageNumber="122">
<paragraph pageId="27" pageNumber="122">
Figure 9.
<taxonomicName class="Insecta" family="Passalidae" genus="Yumtaax" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Yumtaax jimenezi" order="Coleoptera" pageId="27" pageNumber="122" phylum="Arthropoda" rank="species" species="jimenezi">Yumtaax jimenezi</taxonomicName>
Beza-Beza, Reyes-Castillo &amp; Jameson, sp. n., holotype: A dorsal habitus B ventral habitus C dorsal view of pronotum and head D lateral view of pronotum and head E lateral view of aedeagus F ventral view of aedeagus G dorsal view of aedeagus.
</paragraph>
</caption>
</subSubSection>
</treatment>
</document>