274 lines
34 KiB
XML
274 lines
34 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.77.935" ID-GBIF-Dataset="4f66890f-80e1-405d-b0b3-54ba02209183" ID-PMC="PMC3088054" ID-Pensoft-Pub="1313-2970-77-1" ID-PubMed="21594148" ModsDocAuthor="" ModsDocDate="2011" ModsDocID="1313-2970-77-1" ModsDocOrigin="ZooKeys 77" ModsDocTitle="Redescription of Marstonia comalensis (Pilsbry & Ferriss, 1906), a poorly known and possibly threatened freshwater gastropod from the Edwards Plateau region (Texas)" checkinTime="1451250829433" checkinUser="pensoft" docAuthor="Hershler, Robert & Liu, Hsiu-Ping" docDate="2011" docId="085AEEE8765D633D86E1185B92091152" docLanguage="en" docName="ZooKeys 77: 1-16" docOrigin="ZooKeys 77" docSource="http://dx.doi.org/10.3897/zookeys.77.935" docTitle="Marstonia comalensis Pilsbry & Ferriss 1906" docType="treatment" docVersion="4" lastPageNumber="9" masterDocId="FFCAFFE5FFF9D536FA2BFFBEFFFFFFED" masterDocTitle="Redescription of Marstonia comalensis (Pilsbry & Ferriss, 1906), a poorly known and possibly threatened freshwater gastropod from the Edwards Plateau region (Texas)" masterLastPageNumber="16" masterPageNumber="1" pageNumber="4" updateTime="1668165979286" updateUser="ExternalLinkService">
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<mods:titleInfo>
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<mods:title>Redescription of Marstonia comalensis (Pilsbry & Ferriss, 1906), a poorly known and possibly threatened freshwater gastropod from the Edwards Plateau region (Texas)</mods:title>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Hershler, Robert</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Liu, Hsiu-Ping</mods:namePart>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>ZooKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2011</mods:date>
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<mods:detail type="volume">
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<mods:number>77</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>16</mods:end>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.77.935</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.77.935</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-77-1</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="159361141" LSID="urn:lsid:plazi:treatment:085AEEE8765D633D86E1185B92091152" httpUri="http://treatment.plazi.org/id/085AEEE8765D633D86E1185B92091152" lastPageId="8" lastPageNumber="9" pageId="3" pageNumber="4">
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<subSubSection pageId="3" pageNumber="4" type="nomenclature">
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<paragraph pageId="3" pageNumber="4">
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<taxonomicName authority="Pilsbry & Ferriss, 1906" authorityName="Pilsbry & Ferriss" authorityYear="1906" class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="3" pageNumber="4" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis (Pilsbry & Ferriss, 1906)</taxonomicName>
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Figs 13
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</paragraph>
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</subSubSection>
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<subSubSection pageId="3" pageNumber="4" type="reference_group">
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<paragraph pageId="3" pageNumber="4">
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<taxonomicName class="Gastropoda" family="Amnicolidae" genus="Amnicola" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Amnicola comalensis" order="Littorinimorpha" pageId="3" pageNumber="4" phylum="Mollusca" rank="species" species="comalensis">Amnicola comalensis</taxonomicName>
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Pilsbry & Ferriss, 1906: 171, fig. 37 (Comal Creek, near New Braunfels, Comal County, Texas; also from the Guadalupe River about four miles [3.2 km] above New Braunfels).
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<bibRefCitation author="Pilsbry, HA" journalOrPublisher="Nautilus" pageId="11" pageNumber="12" pagination="97 - 100" title="New Amnicolidae of the Panuco River system, Mexico" volume="23" year="1910">Pilsbry 1910</bibRefCitation>
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: 98 (corrected measurement of figured specimen [lectotype]).
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<bibRefCitation author="Walker, B" journalOrPublisher="University of Michigan Museum of Zoology Miscellaneous Publications" pageId="12" pageNumber="13" pagination="1 - 133" title="A synopsis of the classification of the fresh-water Mollusca of North America, north of Mexico, and a catalogue of the more recently described species, with notes." volume="6" year="1918">Walker 1918</bibRefCitation>
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: 133.
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<bibRefCitation author="Baker, HB" journalOrPublisher="Proceedings of the Academy of Natural Sciences of Philadelphia" pageId="10" pageNumber="11" pagination="149 - 193" title="Type land snails in the Academy of Natural Sciences of Philadelphia. Part III. Limnophile and thalassophile Pulmonata. Part IV. Land and fresh-water Prosobranchia." volume="116" year="1964">Baker 1964</bibRefCitation>
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: 172 (lectotype selection).
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<bibRefCitation author="Hershler, R" journalOrPublisher="Journal of Molluscan Studies" pageId="10" pageNumber="11" pagination="33 - 55" title="Redescription of Paludina integra Say, 1821, type species of genus Cincinnatia (Gastropoda: Hydrobiidae)." volume="62" year="1996">Hershler and Thompson 1996</bibRefCitation>
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: 51.
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</paragraph>
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<paragraph pageId="3" pageNumber="4">
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Cincinnatia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cincinnatia comalensis" order="Littorinimorpha" pageId="3" pageNumber="4" phylum="Mollusca" rank="species" species="comalensis">Cincinnatia comalensis</taxonomicName>
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<bibRefCitation author="Taylor, DW" journalOrPublisher="University of Michigan Papers on Paleontology" pageId="11" pageNumber="12" pagination="1 - 384" title="Index and bibliography of late Cenozoic freshwater Mollusca of western North America." volume="10" year="1975">Taylor 1975</bibRefCitation>
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: 61 (transfer to
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Cincinnatia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cincinnatia" order="Littorinimorpha" pageId="3" pageNumber="4" phylum="Mollusca" rank="genus">Cincinnatia</taxonomicName>
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, summary of literature citations).
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<bibRefCitation author="Burch, JB" journalOrPublisher="Walkerana" pageId="10" pageNumber="11" pagination="81 - 215" title="North American freshwater snails. Species list, ranges and illustrations." volume="1" year="1980">Burch and Tottenham 1980</bibRefCitation>
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: 110, fig. 190 (from
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<bibRefCitation author="Pilsbry, HA" journalOrPublisher="Proceedings of the Academy of Natural Sciences of Philadelphia" pageId="11" pageNumber="12" pagination="123 - 175" title="Mollusca of the southwestern states. II" volume="58" year="1906">Pilsbry and Ferris 1906</bibRefCitation>
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).
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<bibRefCitation author="Turgeon, DD" journalOrPublisher="American Fisheries Society Special Publication" pageId="12" pageNumber="13" title="Common and scientific names of aquatic invertebrates from the United States and Canada: Mollusks. Second edition" volume="26" year="1998">Turgeon et al. 1998</bibRefCitation>
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: 72.
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</paragraph>
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<paragraph pageId="3" pageNumber="4">
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="3" pageNumber="4" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
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<bibRefCitation author="Thompson, FG" journalOrPublisher="Veliger" pageId="11" pageNumber="12" pagination="269 - 271" title="Two genera of North American freshwater snails: Marstonia Baker, 1926, resurrected to generic status, and Floridobia, new genus (Prosobranchia: Hydrobiidae: Nymphophilinae)." volume="45" year="2002">Thompson and Hershler 2002</bibRefCitation>
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: 270 (transfer to
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia" order="Littorinimorpha" pageId="3" pageNumber="4" phylum="Mollusca" rank="genus">Marstonia</taxonomicName>
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).
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<bibRefCitation author="Hershler, R" journalOrPublisher="Zoologica Scripta" pageId="10" pageNumber="11" pagination="357 - 366" title="Phylogenetic relationships of North American nymphophiline gastropods based on mitochondrial DNA sequences." volume="32" year="2003 a">Hershler et al. 2003a</bibRefCitation>
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: 366, figs. 2, 3 (new record, phylogenetic analysis).
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</paragraph>
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</subSubSection>
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<subSubSection pageId="3" pageNumber="4" type="types">
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<paragraph pageId="3" pageNumber="4">Types:</paragraph>
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<paragraph pageId="3" pageNumber="4">Figured lectotype, ANSP 91323 (Fig. 1A); paralectotypes (from same lot), ANSP 420575.</paragraph>
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</subSubSection>
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<subSubSection lastPageId="5" lastPageNumber="6" pageId="3" pageNumber="4" type="referred material">
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<paragraph pageId="3" pageNumber="4">Referred material:</paragraph>
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<paragraph lastPageId="5" lastPageNumber="6" pageId="3" pageNumber="4">
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TEXAS. USNM 123757, USNM 134007, Guadalupe River. ANSP 134247, Nueces River. Bell County: UMBMNH uncat., Salado Creek, Salado, old US 81 (30.944°N, 97.539°W), 14.IV.1972. Comal County: ANSP 90562, drift of Guadalupe River, 3.2 km above New Braunfels (29.756°N, 98.138°W). UMBMNH uncat., Spring Branch, west of Spring Branch (29.891°N, 98.435°W), 28.III.1963. USNM 473488, New Braunfels (29.702°N, 98.124°W). Kerr County: USNM 874910, South Fork Guadalupe River, ca. 56.4 km northwest of Leakey (29.957°N, 99.456°W), 30.XII.1979. USNM 874932, spring run adjacent to South Fork of Guadalupe River, ca. 11.2 km southwest of Hunt (30.005°N, 99.409°W), 30.XII.1979. USNM 883412, North Fork Guadalupe River (30.054°N, 99.486°W), 26.IV.1993. USNM 874923, North Fork of Guadalupe River at Riverbend Ranch crossing at FM 1340 (30.065°N, 99.373°W), 29.XII.1979. USNM 251887, Japonica (30.064°N, 99.344°W). Kimble County: UMBMNH uncat., Llano River at FM 385, 25.6 km northeast of Junction (30.589°N, 99.598°W), 12-13.IV.1972. Kinney County: UMBMNH uncat., Nueces River, Tularosa Road, A.G.
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<normalizedToken originalValue="“Tony”">"Tony"</normalizedToken>
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Rose Ranch (29.518°N, 100.271°W), 9.VI.1971. USNM 883413, West Nueces River above crossing on Tularosa Road near Spring Ranch, just below Silver Lake (29.523°N, 100.251°W), 25.IV.1993. Real County: UMBMNH uncat., USNM 874926, Old Faithful Spring outflow, Hwy 55, 0.8 km north of Camp Wood (29.680°N, 100.015°W), 8.VI.1971, 31.XII.1979. FMNH 283564, FMNH 283565, FMNH 283573, FMNH 287574, Old Faithful Spring,
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<pageBreakToken pageId="4" pageNumber="5" start="start">1.0</pageBreakToken>
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km north of Camp Wood (29.680°N, 100.015°W), 27.I.2001. USNM 883414, Leakey Springs run at Hwy 337 crossing, ca. 0.48 km east of Leakey (29.723°N, 99.757°W), 25.IV.1993. FMNH 283561, Leakey Springs creek, 0.64 km east of Leakey (29.723°N, 99.757°W), 26.I.2001. Uvalde County: UMBMNH uncat., Nueces River,
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<pageBreakToken pageId="5" pageNumber="6" start="start">Chalk</pageBreakToken>
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Bluff, 24 km northwest of Uvalde (29.359°N, 99.984°W), 27.V.1971. USNM 883477, spring at Camp Chalk Bluff, tributary to East Nueces River (29.362°N, 99.984°W), 23.IV.1993. USNM 883666, USNM 883421, East Nueces River at 19 Mile Crossing, 1.6-3.2 km south of Hwy 55 and FM 334 (29.398°N, 100.00°W), 31.XII.1979, 29.IV.1993. UMBMNH uncat., USNM 883420, East Nueces River, Hwy 55, Lake Nueces County Park (29.619°N, 100.01°W), 1-VI-1971, 29.IV.1993.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="5" pageNumber="6" type="revised diagnosis">
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<paragraph pageId="5" pageNumber="6">Revised diagnosis:</paragraph>
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<paragraph pageId="5" pageNumber="6">
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Shell large for genus (maximum height, 4.6 mm), ovate-conic, openly umbilicate; penis with short filament and oblique, squarish lobe bearing a single terminal gland along its distal edge. Distinguished from congeners having closely similar shells and penes as follows: from
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia gaddisorum" order="Littorinimorpha" pageId="5" pageNumber="6" phylum="Mollusca" rank="species" species="gaddisorum">Marstonia gaddisorum</taxonomicName>
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Thompson by its less convex shell whorls, distinctive pallial roof pigmentation, larger number of cusps on the inner side of the lateral teeth and on the outer marginal teeth, larger penial lobe, narrower terminal gland, and smaller overlap of the bursa copulatrix by the albumen gland; from
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia lustrica" order="Littorinimorpha" pageId="5" pageNumber="6" phylum="Mollusca" rank="species" species="lustrica">Marstonia lustrica</taxonomicName>
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by its smaller prostate gland, smaller penial lobe, narrower penial filament, straight anterior vas deferens, partly imbedded (in albumen gland) bursal duct, and larger seminal receptacle; and from
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia ogmorhaphe" order="Littorinimorpha" pageId="5" pageNumber="6" phylum="Mollusca" rank="species" species="ogmorhaphe">Marstonia ogmorhaphe</taxonomicName>
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Thompson by its smaller size, broader shell, smaller prostate gland, straight anterior vas deferens, and smaller bursa copulatrix.
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</paragraph>
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</subSubSection>
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<subSubSection lastPageId="7" lastPageNumber="8" pageId="5" pageNumber="6" type="description">
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<paragraph pageId="5" pageNumber="6">Description:</paragraph>
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<paragraph lastPageId="6" lastPageNumber="7" pageId="5" pageNumber="6">
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Shell ovate-conic, (Fig. 1
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<normalizedToken originalValue="A–C">A-C</normalizedToken>
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); height about 2.6-4.6 mm; whorls 4.5-5.5. Protoconch near planispiral, slightly tilted (Fig. 1D), initial 0.75-1.0 whorl strongly wrinkled (Fig. 1E). Teleoconch whorls weakly convex, often narrowly shouldered,
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<pageBreakToken pageId="6" pageNumber="7" start="start">rarely</pageBreakToken>
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having subsutural angulation; sculpture of strong collabral growth lines, later whorls having numerous weak spiral striae. Aperture pyriform or ovate. Inner lip complete across parietal wall in larger specimens, usually narrowly adnate, rarely slightly disjunct; usually thin, sometimes slightly thickened apically; columellar shelf absent or very narrow; outer lip thin or slightly thickened, orthocline or prosocline. Umbilicus open but small. Measurements of the lectotype and a live-collected series of shells from the Nueces River basin are in Table 2.
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</paragraph>
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<paragraph pageId="6" pageNumber="7">
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Operculum thin, amber, narrowly ovate, multispiral with eccentric nucleus (Fig. 1F); last 0.25 whorl sometimes frilled on outer side; inner side having well developed rim near outer edge (Fig. 1G); attachment scar border sometimes weakly thickened near nucleus. Radula (Fig. 2A), having about 36 well-formed rows of teeth. Central teeth about 38
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<normalizedToken originalValue="µm">µm</normalizedToken>
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wide, cutting edge convex (Fig. 2B); lateral cusps 3-8; central cusp pointed or hoe-shaped, parallel-sided proximally or tapering throughout; basal cusps 1-3, small; basal tongue U- or V-shaped, about as long as lateral margins. Lateral tooth face rectangular; central cusp pointed or hoe-shaped (Fig. 2C); lateral cusps 2-5 (inner), 3-7 (outer); outer wing broad, flexed, about 140% length of cutting edge; basal tongue weakly developed. Inner (Fig. 2D) and outer (Fig 2E) marginal teeth both having 14-21 cusps and basally positioned rectangular wing. Radular count data were from USNM 874926.
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</paragraph>
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<paragraph lastPageId="7" lastPageNumber="8" pageId="6" pageNumber="7">
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Cephalic tentacles pale except for black eyespots. Snout brown; distal lips pale; foot pale. Pallial roof having black pigment bands along edges of ctenidium and dorsal edge of genital duct (Fig. 1H); visceral coil pale except for black pigment on testis. Ctenidium positioned a little in front of pericardium; ctenidial filaments 24-25 (n=5), broadly triangular, lateral surfaces ridged. Osphradium narrow, positioned slightly posterior to middle of ctenidium. Hypobranchial gland large, overlapping rectum and part of genital duct, thickened alongside kidney. Style sac longer than remaining portion of stomach, posterior stomach having small caecal appendix. Testis large (1.75 whorls), composed of compound lobes, broadly overlapping stomach anteriorly. Seminal vesicle opening near anterior edge of testis, composed of a few thickened coils, positioned along ventral side of anterior 33% of testis. Prostate gland small, pea-shaped, with about 50% of length in pallial roof. Anterior vas deferens
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<pageBreakToken pageId="7" pageNumber="8" start="start">opening</pageBreakToken>
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from antero-ventral edge of prostate gland, section of duct on columellar muscle straight. Penis large, base rectangular, inner edge without folds; filament short, narrow, tapering, oblique; lobe rather medium-sized, squarish, oblique (Fig. 3A). Terminal gland (Fig. 3
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<normalizedToken originalValue="A–D">A-D</normalizedToken>
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) narrow, usually transversely positioned along outer edge of lobe (58/86 specimens examined from three samples), less frequently horizontal (28/86), sometimes borne on short stalk. Penial duct narrow, near outer edge, almost straight. Penial filament having black internal pigment core along most of length. Ovary small (0.75 whorl), composed of simple, stalked lobes; slightly overlapping stomach anteriorly. Female glandular oviduct and associated structures shown in Figure 3
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<normalizedToken originalValue="E–F">E-F</normalizedToken>
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. Coiled oviduct narrow, vertical. Bursa copulatrix small, ovate, horizontal, about 50% overlapped by albumen gland. Bursal duct longer than bursa, narrow, opening from distal edge, partly embedded in albumen gland proximally, entirely embedded distally, junction with common duct well in front of posterior wall of pallial cavity. Seminal receptacle small, pouch-like, positioned near ventral edge of albumen gland slightly anterior to bursa copulatrix. Albumen gland largely visceral. Capsule gland composed of two distinct tissue sections. Genital aperture a terminal slit.
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</paragraph>
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<caption pageId="7" pageNumber="8">
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<paragraph pageId="7" pageNumber="8">
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Figure 1. Shells, opercula and animal,
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
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. A Lectotype, ANSP 91323 B, C Shells, USNM 874932, USNM 874926 D Lateral view of shell apex, USNM 874932 E Protoconch, USNM 874926 F, G Opercula (outer, inner sides), USNM 874926 H Relaxed, alcohol-preserved preserved male (dorsal view), showing distinctive pigment bands on the pallial roof, USNM 874926. Scale bars
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<normalizedToken originalValue="A–C">A-C</normalizedToken>
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, H, 1.0 mm; D, E, 100
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<normalizedToken originalValue="µm">µm</normalizedToken>
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; F, G, 200
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<normalizedToken originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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<caption pageId="7" pageNumber="8">
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<paragraph pageId="7" pageNumber="8">
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Figure 2. Radula,
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
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, USNM 874926. A Portion of radular ribbon B Central teeth C Lateral teeth D Inner marginal tooth E Outer marginal teeth. Scale bars A, 20
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<normalizedToken originalValue="µm">µm</normalizedToken>
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; B-E, 10
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<normalizedToken originalValue="µm">µm</normalizedToken>
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.
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</paragraph>
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</caption>
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<caption pageId="7" pageNumber="8">
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<paragraph pageId="7" pageNumber="8">
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Figure 3. Reproductive anatomy,
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
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, USNM 874926. A Penis, dorsal surface
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<normalizedToken originalValue="B–D">B-D</normalizedToken>
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Distal portion of penis showing terminal gland variation E Female glandular oviduct and associated structures (viewed from left side) F Bursa copulatrix and seminal receptacle and their ducts. Scale bars = 500
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<normalizedToken originalValue="µm">µm</normalizedToken>
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. Ag albumen gland Bu bursa copulatrix Cg capsule gland Cov coiled oviduct Dby bursal duct Ga genital aperture Pf penial filament Pl penial lobe Pw posterior wall of pallial cavity Sr seminal receptacle Vc ventral channel of capsule gland.
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</paragraph>
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</caption>
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<caption pageId="7" pageNumber="8">
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<paragraph pageId="7" pageNumber="8">
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Figure 4. Map showing the distribution of
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
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in the Brazos, Colorado, Guadalupe and Nueces River basins, south-central Texas. The arrow indicates the type locality (Comal Creek).
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection pageId="7" pageNumber="8" type="distribution and habitat">
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<paragraph pageId="7" pageNumber="8">Distribution and habitat:</paragraph>
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<paragraph pageId="7" pageNumber="8">
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<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
|
||
is distributed in the upper portions of the Brazos, Colorado, Guadalupe and Nueces River basins, south-central Texas (Fig. 4); almost all of these localities are on the Edwards Plateau. We were unable to confirm a previous report of this species from a drainage canal near Galveston Bay (
|
||
<bibRefCitation author="Cable, RM" journalOrPublisher="Proceedings of the Helminthological Society of Washington" pageId="10" pageNumber="11" pagination="131 - 135" title="A protandrous haploporid cercaria, probably the larva of Saccocoelioides sogandaresi Lumsden, 1963." volume="36" year="1969">Cable and Isserhoff 1969</bibRefCitation>
|
||
).
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
|
||
lives in cold water springs near their sources and slack water riverine habitats; it has been most commonly found on mud, aquatic vegetation and dead leaves.
|
||
</paragraph>
|
||
<caption ID-Table-UUID="097F879AE1FDB818A1570A2CAD132EB9" httpUri="http://table.plazi.org/id/097F879AE1FDB818A1570A2CAD132EB9" pageId="7" pageNumber="8">
|
||
<paragraph pageId="7" pageNumber="8">
|
||
Table 2. Shell parameters for
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph pageId="7" pageNumber="8">
|
||
<table pageId="7" pageNumber="8">
|
||
<tr pageId="7" pageNumber="8">
|
||
<th colspan="1" pageId="7" pageNumber="8" rowspan="1">WH</th>
|
||
<th colspan="1" pageId="7" pageNumber="8" rowspan="1">SH</th>
|
||
<th colspan="1" pageId="7" pageNumber="8" rowspan="1">SW</th>
|
||
<th colspan="1" pageId="7" pageNumber="8" rowspan="1">HBW</th>
|
||
<th colspan="1" pageId="7" pageNumber="8" rowspan="1">WBW</th>
|
||
<th colspan="1" pageId="7" pageNumber="8" rowspan="1">AH</th>
|
||
<th colspan="1" pageId="7" pageNumber="8" rowspan="1">AW</th>
|
||
<th colspan="1" pageId="7" pageNumber="8" rowspan="1">SW/SH</th>
|
||
<th colspan="1" pageId="7" pageNumber="8" rowspan="1">HBW/SH</th>
|
||
<th colspan="1" pageId="7" pageNumber="8" rowspan="1">AH/SH</th>
|
||
</tr>
|
||
</table>
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection lastPageId="8" lastPageNumber="9" pageId="7" pageNumber="8" type="remarks">
|
||
<paragraph pageId="7" pageNumber="8">Remarks:</paragraph>
|
||
<paragraph pageId="7" pageNumber="8">
|
||
The material referred to
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
|
||
herein, which includes specimens from the Guadalupe River above the Comal Creek confluence, closely conforms to the types of this species both in size and shell shape (Fig. 1
|
||
<normalizedToken originalValue="A–C">A-C</normalizedToken>
|
||
). This snail clearly belongs to
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="genus">Marstonia</taxonomicName>
|
||
based on its strongly wrinkled shell protoconch, distally bifurcate penis ornamented with a gland along the edge of the lobe (terminal gland), and connection between the oviduct and bursal duct well in front of the posterior pallial wall (
|
||
<bibRefCitation author="Thompson, FG" journalOrPublisher="Veliger" pageId="11" pageNumber="12" pagination="269 - 271" title="Two genera of North American freshwater snails: Marstonia Baker, 1926, resurrected to generic status, and Floridobia, new genus (Prosobranchia: Hydrobiidae: Nymphophilinae)." volume="45" year="2002">Thompson and Hershler 2002</bibRefCitation>
|
||
). As noted above, this generic placement is also supported by molecular phylogenetic evidence (
|
||
<bibRefCitation author="Hershler, R" journalOrPublisher="Zoologica Scripta" pageId="10" pageNumber="11" pagination="357 - 366" title="Phylogenetic relationships of North American nymphophiline gastropods based on mitochondrial DNA sequences." volume="32" year="2003 a">Hershler et al. 2003a</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph pageId="7" pageNumber="8">
|
||
The original collections of
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
|
||
are worn shells having the appearance of drift material (Fig. 1A). We have not seen any live-collected specimens of this species in the numerous samples that we have examined from the type locality (Comal Springs) and other waters near New Braunfels. The various reports of living
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
|
||
from this portion of the Guadalupe River basin (e.g.,
|
||
<bibRefCitation author="EHA, (Espey, Huston & Associates, Inc.)" journalOrPublisher="Austin, TX" pageId="10" pageNumber="11" title="Investigation of flow requirements from Comal and San Marcos Springs to maintain associated aquatic ecosystems Guadalupe River basin. Document No. 7503" volumeTitle="Report to the Texas Water Development Board" year="1975">EHA 1975</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Arsuffi, T" journalOrPublisher="Austin, TX" pageId="10" pageNumber="11" title="Status of the Comal Springs riffle beetle (Heterelmis comalensis Bosse, Tuff and Brown), Peck's cave amphipod (Stygobromus pecki Holsinger), and the Comal Springs drypoid beetle (Stygoparnus comalensis Barr and Spangler). Contract No. 14 - 16 - 0002 - 90 - 207" volumeTitle="Report to the United States Fish and Wildlife Service" year="1994">Arsuffi 1994</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Tolley-Jordan, LR" journalOrPublisher="Hydrobiologia" pageId="11" pageNumber="12" pagination="29 - 40" title="Habitat influences snail community structure and trematode infection levels in a spring-fed river, Texas, USA." volume="600" year="2008">Tolley-Jordan and Owen 2008</bibRefCitation>
|
||
) are probably of misidentified
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Cincinnatia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cincinnatia integra" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="integra">Cincinnatia integra</taxonomicName>
|
||
, as evidenced by the illustrations of shells in several of these documents (
|
||
<bibRefCitation author="Lindholm, JJT" journalOrPublisher="South Texas State University, San Marcos, TX" pageId="11" pageNumber="12" title="The gastropods of the upper San Marcos River and their trematode parasites. M. S. thesis" year="1979">Lindholm 1979</bibRefCitation>
|
||
, fig. 4;
|
||
<bibRefCitation author="Cauble, MK" journalOrPublisher="Southwest Texas State University, San Marcos, Texas" pageId="10" pageNumber="11" title="Abundance and distribution of the freshwater snail fauna in Comal Springs-Landa Lake, New Braunfels, Comal Co., TX. M. S. thesis" year="1998">Cauble 1998</bibRefCitation>
|
||
, fig. 7). It is possible that
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="7" pageNumber="8" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
|
||
became extinct at Comal Springs when this water body temporarily dried in 1964 (
|
||
<bibRefCitation author="USFWS, (United States Fish and Wildlife Service)" journalOrPublisher="Austin, Texas" pageId="12" pageNumber="13" title="San Marcos and Comal Springs and associated aquatic ecosystems (revised) recovery plan for San Marcos gambusia (Gambusia georgei), Fountain darter (Etheostoma fonticola), San Marcos salamander (Eurycea nana), Texas wild-rice (Zizania texana), Texas blind salamander (Typhlomolge rathbuni)" url="http://www.fws.gov/ecos/ajax/docs/recovery_plan/960214.pdf" year="1996">USFWS 1996</bibRefCitation>
|
||
); it is also possible that the shells of this species which have been found at this site were washed downflow from extant populations in the headwaters of the Guadalupe River.
|
||
</paragraph>
|
||
<paragraph pageId="8" pageNumber="9">
|
||
<pageBreakToken pageId="8" pageNumber="9" start="start">
|
||
<normalizedToken originalValue="Taylor’s">Taylor's</normalizedToken>
|
||
</pageBreakToken>
|
||
(1975) allocation of
|
||
<taxonomicName class="Gastropoda" family="Amnicolidae" genus="Amnicola" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Amnicola comalensis" order="Littorinimorpha" pageId="8" pageNumber="9" phylum="Mollusca" rank="species" species="comalensis">Amnicola comalensis</taxonomicName>
|
||
to
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Cincinnatia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cincinnatia" order="Littorinimorpha" pageId="8" pageNumber="9" phylum="Mollusca" rank="genus">Cincinnatia</taxonomicName>
|
||
appears to have been the result of a misidentification as all of the material in his collection that he referred to this species (per the original labels), including several lots from the type locality, is
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Cincinnatia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cincinnatia integra" order="Littorinimorpha" pageId="8" pageNumber="9" phylum="Mollusca" rank="species" species="integra">Cincinnatia integra</taxonomicName>
|
||
(RH unpublished). Some of these records were detailed in an unpublished manuscript, "Freshwater molluscs from the Nueces River drainage, Texas" that Taylor circulated in the mid-1970's.
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Cincinnatia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Cincinnatia integra" order="Littorinimorpha" pageId="8" pageNumber="9" phylum="Mollusca" rank="species" species="integra">Cincinnatia integra</taxonomicName>
|
||
, which is widely distributed in Texas (
|
||
<bibRefCitation author="Hershler, R" journalOrPublisher="Journal of Molluscan Studies" pageId="10" pageNumber="11" pagination="33 - 55" title="Redescription of Paludina integra Say, 1821, type species of genus Cincinnatia (Gastropoda: Hydrobiidae)." volume="62" year="1996">Hershler and Thompson 1996</bibRefCitation>
|
||
), has been frequently confused with
|
||
<taxonomicName class="Gastropoda" family="Hydrobiidae" genus="Marstonia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Marstonia comalensis" order="Littorinimorpha" pageId="8" pageNumber="9" phylum="Mollusca" rank="species" species="comalensis">Marstonia comalensis</taxonomicName>
|
||
in museum collections despite the obvious differences between their shells that were noted in the original description of the latter (
|
||
<bibRefCitation author="Pilsbry, HA" journalOrPublisher="Proceedings of the Academy of Natural Sciences of Philadelphia" pageId="11" pageNumber="12" pagination="123 - 175" title="Mollusca of the southwestern states. II" volume="58" year="1906">Pilsbry and Ferriss 1906</bibRefCitation>
|
||
). These two species also well differentiated anatomically (see
|
||
<bibRefCitation author="Hershler, R" journalOrPublisher="Journal of Molluscan Studies" pageId="10" pageNumber="11" pagination="33 - 55" title="Redescription of Paludina integra Say, 1821, type species of genus Cincinnatia (Gastropoda: Hydrobiidae)." volume="62" year="1996">Hershler and Thompson 1996</bibRefCitation>
|
||
for details of the former).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |