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Caenogastropoda: Cerithioidea)

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Caenogastropoda: Cerithioidea) Exploring the unknown: On the diversity of pachychilid freshwater gastropods in Vietnam (Caenogastropoda: Cerithioidea) ! "#$%&!'()*+#,-!./!0$%!123-!4/!1)$%)!4$53! ! ,!6!7/##+89/%:5%;!$2<)/#=!>28+2?!@A#!B$<2#&2%:+-!42?C/*:<DE%5F+#85<G<-!H%F$*5:+%8<#=!IJ-! ,K,,L!M+#*5%-!N+#?$%O=!72##+%<!$::#+88P!Q28<#$*5$%!>28+2?-!R!7/**+;+!S<#++<-!SO:%+O!BST! 3K,K-!Q28<#$*5$=!U?$5*P!@#$%&=&/+)*+#V$28<?28=;/F=$2! ! 3!6!05+<%$?+8+!QW$:+?O!/@!SW5+%W+!$%:!1+W)%/*/;O-!H%8<5<2<+!/@!UW/*/;O!$%:!M5/D X+8/2#W+8-!,Y!4/$%;!Z2/W!05+<-!7$2!N5$O-!4$%/5-!05+<%$?=!! ! X2%%5%;!)+$:P!! 05+<%$?+8+![$W)OW)5*5:$+! '+O\/#:8P! Brotia-!Sulcospira-!Adamietta-!<$]/%/?O-!8O8<+?$<5W8-!9)O*/;+%O-!?/#9)/*/;O-!?5:;2<!! !! ! Abstract Q!#+F585/%!/@!05+<%$?+8+!@#+8)\$<+#!;$8<#/9/:8!/@!<)+!@$?5*O![$W)OW)5*5:$+!58!9#+8+%<+:! C$8+:!/%!<)+!$%$*O858!/@!?/#9)/*/;5W$*!W)$#$W<+#58<5W8!$%:!9$#<5$*!8+^2+%W+8!/@!<)+! ?5</W)/%:#5$*!;+%+8!/@!,RS!#XBQ!_,RS`!$%:!WO</W)#/?+!W!/]5:$8+!82C2%5<!H!_7aH`=!T+!@/2%:! <)$<!5%!05+<%$?!<\/!9$W)OW)5*5:!;+%+#$!/WW2#-!Brotia!$%:!Sulcospira=!a@!<)+!+5;)<!</!@5@<++%! 89+W5+8!#+9/#<+:!CO!+$#*5+#!$2<)/#8-!\+!W$%!/%*O!W/%@5#?!<)+!9#+8+%W+!/@!<\/!89+W5+8-! Sulcospira tonkiniana!$%:!S. tourannensis=!Q**!@2#<)+#!<$]/%/?5W!%$?+8!<)$<!\+#+!9#+F5/28*O! $99*5+:!@/#!05+<%$?+8+!9$W)OW)5*5:8!$#+!W/%85:+#+:!+5<)+#!$8!b2%5/#!8O%/%O?8!/@!<)+8+!<\/! 89+W5+8!/#!+##/%+/28!#+@+#+%W+8!</!89+W5+8!@#/?!/<)+#!#+;5/%8!/@!S/2<)+$8<!$%:!S/2<)!Q85$=! Q::5<5/%$**O-!\+!:+8W#5C+!<\/!%+\!89+W5+8!/@!Brotia!$%:!@/2#!%+\!89+W5+8!/@!Sulcospira $%:! #+9/#<!$%/<)+# 2%:+8W#5C+:!89+W5+8!\5<)!2%W+#<$5%!$@@5%5<5+8=![$<<+#%8!/@!?/#9)/*/;5W$*!$%:! ;+%+<5W!:5@@+#+%<5$<5/%!/@!<)+!05+<%$?+8+!89+W5+8!$%:!<)+5#!$@@5%5<5+8!\5<)5%!<)+!W/%<+]<!/@! 9$W)OW)5*5:!9)O*/;+%O!$#+!C#5+@*O!:58W288+:=!! ! Introduction 05+<%$?!C/$8<8!$!#5W)!C5/<$!\5<)!W/%85:+#$C*+!*+F+*8!/@!+%:+?58?=!4/\+F+#-!/2#!&%/\*+:;+! /@!<)58!:5F+#85<O!58!8<5**!9$<W)O!$%:!C5$8+:!</\$#:8!F+#<+C#$<+8!\)5*8<!?/8<!5%F+#<+C#$<+!;#/298! #+?$5%!9//#*O!:/W2?+%<+:!_S<+#*5%!+<!$*=!3KKR`=![$W)OW)5*5:!@#+8)\$<+#!;$8<#/9/:8-!\)5W)!$#+! <)+!82Cb+W<!/@!<)58!9$9+#-!8+#F+!$8!$%!+]$?9*+!</!5**28<#$<+!)/\!5%W/?9*+<+!/2#!W2##+%<! 2%:+#8<$%:5%;!/@!?$%O!5%F+#<+C#$<+!;#/298!#+?$5%8-!#+;$#:*+88!/@!<)+5#!+W/*/;5W$*!5?9/#<$%W+! $%:!9/<+%<5$*!$8!+W/*/;5W$*!5%:5W$</#8=!1)+!C$85W!&%/\*+:;+!/@!<)+!@#+8)\$<+#!;$8<#/9/:!@$2%$! /@!05+<%$?!\$8!+8<$C*58)+:!CO!"#+%W)!\/#&+#8!/@!<)+!*$<+!,c<)!$%:!+$#*O!3K<)!W+%<2#O!_+=;=-! 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    Bulletin of the Mizunami Fossil Museum, no. 45 (March 15, 2019), p. 87–94, 3 fi gs. © 2019, Mizunami Fossil Museum Four new species of the genus Semisulcospira (Mollusca: Caenogastropoda: Semisulcospiridae) from the Plio– Pleistocene Kobiwako Group, Mie and Shiga Prefectures, central Japan Keiji Matsuoka* and Osamu Miura** * Toyohashi Museum of Natural History, 1-238 Oana, Oiwa-cho, Toyohashi City, Aichi 441-3147, Japan <[email protected]> ** Faculty of Agriculture and Marine Science, Kochi University, 200 Monobe, Nankoku, Kochi 783-8502, Japan <[email protected]> Abstract Four new species of the freshwater snail in the genus Semisulcospira are described from the early Pleistocene Gamo Formation and the late Pliocene Ayama and Koka Formations of the Kobiwako Group in central Japan. These four new species belong to the subgenus Biwamelania. Semisulcospira (Biwamelania) reticulataformis, sp. nov., Semisulcospira (Biwamelania) nojirina, sp. nov., Semisulcospira (Biwamelania) gamoensis, sp. nov., and Semisulcospira (Biwamelania) tagaensis, sp. nov. are newly described herein. The authorship of Biwamelania is attributed to Matsuoka and Nakamura (1981) and Melania niponica Smith, 1876, is designated as the type species of Biwamelania by Matsuoka and Nakamura (1981). Key words: Semisulcospiridae, Semisulcospira, Biwamelania, Pliocene, Pleistocene, Kobiwako Group, Japan Introduction six were already described; Semisulcospira (Biwamelania) praemultigranosa Matsuoka, 1985, Semisulcospira Boettger, 1886 is a freshwater was described from the Pliocene Iga Formation that gastropod genus widely distributed in East Asia. A is the lower part of the Kobiwako Group (Matsuoka, group of Semisulcospira has adapted to the 1985) and five species, Semisulcospira (Biwamelania) environments of Lake Biwa and has acquired unique nakamurai Matsuoka and Miura, 2018, morphological characters, forming an endemic group Semisulcospira (Biwamelania) pseudomultigranosa called the subgenus Biwamelania.
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  • Species Fact Sheet with Juga Hemphilli Hemphilli
    SPECIES FACT SHEET Scientific Name: Juga hemphilli hemphilli (Henderson 1935) Common Name: barren juga Phylum: Mollusca Class: Gastropoda Order: Neotaenioglossa Family: Semisulcospiridae Taxonomic Note: Past genetic analysis by Lee et al. (2006) based on incorrectly identified museum voucher specimens suggested reassignment of the related subspecies Juga hemphilli dallesensis (and therefore the Juga hemphilli conspecifics, including Juga hemphilli hemphilli) to the genus Elimia. However, Foighil et al. (2009) conducted an additional analysis and determined that Juga hemphilli is indeed most closely related to other western Juga and should not be reassigned to the genus Elimia. Turgeon et al. (1998) do not recognize any subspecies of Juga hemphilli. Conservation Status: Global Status: G2T1 (May 2009) National Status: United States (N1) (June 2000) State Statuses: Oregon (S1), Wahington (S1) (NatureServe 2015) IUCN Red List: NE – Not evaluated Technical Description: This subspecies was originally described as Goniobasis hemphilli hemphilli (Henderson 1935). Burch (1982; 1989) revised this subspecies to the genus Juga to reflect the distribution of taxa west of the Continental Divide. Adult: Juga is a genus of medium-sized, aquatic, gilled snails traditionally treated as part of the subfamily Semisulcospirinae within the Pleuroceridae family, although the Semisulcospirinae subfamily was recently elevated to family level based on morphological and molecular evidence (Strong and Köhler 2009). The Pleuroceridae and Semisulcospiridae families both differ from the Hydrobiidae family in that the males lack a verge (male copulatory organ). The genus Juga is distinct from related pleurocerid snails based on reproductive anatomy and egg mass characters (Taylor 1966), as well as features of the ovipositor pore, radula, midgut, kidney, and pallial gonoduct (Strong and Frest 2007).
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  • Freshwater Snail Diversity in Mae Lao Agricultural Basin (Chiang Rai, Thailand) with a Focus on Larval Trematode Infections
    ISSN (Print) 0023-4001 ISSN (Online) 1738-0006 Korean J Parasitol Vol. 56, No. 3: 247-257, June 2018 ▣ ORIGINAL ARTICLE https://doi.org/10.3347/kjp.2018.56.3.247 Freshwater Snail Diversity in Mae Lao Agricultural Basin (Chiang Rai, Thailand) with a Focus on Larval Trematode Infections Kittichai Chantima*, Krittawit Suk-ueng, Mintra Kampan Energy and Environment Program, Faculty of Science and Technology, Chiang Rai Rajabhat University, Chiang Rai 57100, Thailand Abstract: The aim of this study was to conduct a freshwater snail survey in Mae Lao agricultural basin to assess the di- versity with a focus on habitat types and their larval trematode infections. Snails were collected and examined in 14 sites of Mae Lao agricultural basin from August 2016 to October 2017. A total of 1,688 snail individuals were collected and classified into 7 families, 8 genera, and 12 species. Snail diversity and habitat types were higher in rice paddies than irri- gation canals and streams. The most abundant species was Bithynia siamensis siamensis, representing 54.6% of the sample. Three species of snails act as first intermediate host were found with cercarial infections. They were Filopaludina sumatrensis polygramma, B. s. siamensis, and Melanoides tuberculata. The cercariae were categorized into 7 types; echi- nostome, monostome, gymnocephalous, virgulate, parapleurolophocercous, pleurolophocercous and megalurous cer- cariae. Parapleurolophocercous cercariae constituted the most common type of cercariae recovered, contributing 41.2% of all infections in snails. Echinostome metacercariae infections were found in 6 snail species with 7.6% prevalence. In addition, the metacercaria of avian trematode, Thapariella sp. were found in Filopaludina spp.
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  • Gastropoda, Pleuroceridae), with Implications for Pleurocerid Conservation
    Zoosyst. Evol. 93 (2) 2017, 437–449 | DOI 10.3897/zse.93.14856 museum für naturkunde Genetic structuring in the Pyramid Elimia, Elimia potosiensis (Gastropoda, Pleuroceridae), with implications for pleurocerid conservation Russell L. Minton1, Bethany L. McGregor2, David M. Hayes3, Christopher Paight4, Kentaro Inoue5 1 Department of Biological and Environmental Sciences, University of Houston Clear Lake, 2700 Bay Area Boulevard MC 39, Houston, Texas 77058 USA 2 Florida Medical Entomology Laboratory, Institute of Food and Agricultural Sciences, University of Florida, 200 9th Street SE, Vero Beach, Florida 32962 USA 3 Department of Biological Sciences, Eastern Kentucky University, 521 Lancaster Avenue, Richmond, Kentucky 40475 USA 4 Department of Biological Sciences, University of Rhode Island, 100 Flagg Road, Kingston, Rhode Island 02881 USA 5 Texas A&M Natural Resources Institute, 578 John Kimbrough Boulevard, 2260 TAMU, College Station, Texas 77843 USA http://zoobank.org/E6997CB6-F054-4563-8C57-6C0926855053 Corresponding author: Russell L. Minton ([email protected]) Abstract Received 7 July 2017 The Interior Highlands, in southern North America, possesses a distinct fauna with nu- Accepted 19 September 2017 merous endemic species. Many freshwater taxa from this area exhibit genetic structuring Published 15 November 2017 consistent with biogeography, but this notion has not been explored in freshwater snails. Using mitochondrial 16S DNA sequences and ISSRs, we aimed to examine genetic struc- Academic editor: turing in the Pyramid Elimia, Elimia potosiensis, at various geographic scales. On a broad Matthias Glaubrecht scale, maximum likelihood and network analyses of 16S data revealed a high diversity of mitotypes lacking biogeographic patterns across the range of E.
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  • Evolution of the Pachychilidae TROSCHEL, 1857 (Chaenogastropoda, Cerithioidea) – from the Tethys to Modern Tropical Rivers 41
    44 44 he A Rei Series A/ Zitteliana An International Journal of Palaeontology and Geobiology Series A /Reihe A Mitteilungen der Bayerischen Staatssammlung für Pa lä on to lo gie und Geologie 44 An International Journal of Palaeontology and Geobiology München 2004 Zitteliana Umschlag 44 1 18.01.2005, 10:04 Uhr Zitteliana An International Journal of Palaeontology and Geobiology Series A/Reihe A Mitteilungen der Bayerischen Staatssammlung für Pa lä on to lo gie und Geologie 44 CONTENTS/INHALT REINHOLD R. LEINFELDER & MICHAEL KRINGS Editorial 3 DIETRICH HERM Herbert HAGN † 5 KAMIL ZÁGORŠEK & ROBERT DARGA Eocene Bryozoa from the Eisenrichterstein beds, Hallthurm, Bavaria 17 THORSTEN KOWALKE Evolution of the Pachychilidae TROSCHEL, 1857 (Chaenogastropoda, Cerithioidea) – from the Tethys to modern tropical rivers 41 HERBERT W. SCHICK The stratigraphical signifi cance of Cymaceras guembeli for the boundary between Platynota Zone and Hypselocyclum Zone, and the correlation of the Swabian and Franconian Alb 51 GÜNTER SCHWEIGERT, RODNEY M. FELDMANN & MATTHIAS WULF Macroacaena franconica n. sp. (Crustaceae: Brachyura: Raninidae) from the Turonian of S Germany 61 JÜRGEN KRIWET & STEFANIE KLUG Late Jurassic selachians (Chondrichthyes, Elasmobranchii) from southern Germany: Re-evaluation on taxonomy and diversity 67 FELIX SCHLAGINTWEIT Calcareous green algae from the Santonian Hochmoos Formation of Gosau (Northern Calcareous Alps, Austria, Lower Gosau Group) 97 MICHAEL KRINGS & HELMUT MAYR Bassonia hakelensis (BASSON) nov. comb., a rare non-calcareous
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  • The Freshwater Snails (Mollusca: Gastropoda) of Mexico: Updated Checklist, Endemicity Hotspots, Threats and Conservation Status
    Revista Mexicana de Biodiversidad Revista Mexicana de Biodiversidad 91 (2020): e912909 Taxonomy and systematics The freshwater snails (Mollusca: Gastropoda) of Mexico: updated checklist, endemicity hotspots, threats and conservation status Los caracoles dulceacuícolas (Mollusca: Gastropoda) de México: listado actualizado, hotspots de endemicidad, amenazas y estado de conservación Alexander Czaja a, *, Iris Gabriela Meza-Sánchez a, José Luis Estrada-Rodríguez a, Ulises Romero-Méndez a, Jorge Sáenz-Mata a, Verónica Ávila-Rodríguez a, Jorge Luis Becerra-López a, Josué Raymundo Estrada-Arellano a, Gabriel Fernando Cardoza-Martínez a, David Ramiro Aguillón-Gutiérrez a, Diana Gabriela Cordero-Torres a, Alan P. Covich b a Facultad de Ciencias Biológicas, Universidad Juárez del Estado de Durango, Av.Universidad s/n, Fraccionamiento Filadelfia, 35010 Gómez Palacio, Durango, Mexico b Institute of Ecology, Odum School of Ecology, University of Georgia, 140 East Green Street, Athens, GA 30602-2202, USA *Corresponding author: [email protected] (A. Czaja) Received: 14 April 2019; accepted: 6 November 2019 Abstract We present an updated checklist of native Mexican freshwater gastropods with data on their general distribution, hotspots of endemicity, threats, and for the first time, their estimated conservation status. The list contains 193 species, representing 13 families and 61 genera. Of these, 103 species (53.4%) and 12 genera are endemic to Mexico, and 75 species are considered local endemics because of their restricted distribution to very small areas. Using NatureServe Ranking, 9 species (4.7%) are considered possibly or presumably extinct, 40 (20.7%) are critically imperiled, 30 (15.5%) are imperiled, 15 (7.8%) are vulnerable and only 64 (33.2%) are currently stable.
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  • Title Further Records of Introduced Semisulcospira Snails in Japan
    Further records of introduced Semisulcospira snails in Japan Title (Mollusca, Gastropoda): implications for these snails’ correct morphological identification Sawada, Naoto; Toyohara, Haruhiko; Miyai, Takuto; Nakano, Author(s) Takafumi Citation BioInvasions Records (2020), 9(2): 310-319 Issue Date 2020-04-24 URL http://hdl.handle.net/2433/250819 © Sawada et al. This is an open access article distributed Right under terms of the Creative Commons Attribution License (Attribution 4.0 International - CC BY 4.0). Type Journal Article Textversion publisher Kyoto University BioInvasions Records (2020) Volume 9, Issue 2: 310–319 CORRECTED PROOF Rapid Communication Further records of introduced Semisulcospira snails in Japan (Mollusca, Gastropoda): implications for these snails’ correct morphological identification Naoto Sawada1,*, Haruhiko Toyohara1, Takuto Miyai2 and Takafumi Nakano3 1Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan 216-4, Oshikiri, Ichikawa City, Chiba 272-0107, Japan 3Department of Zoology, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan Author e-mails: [email protected] (NS), [email protected] (HT), [email protected] (TM), [email protected] (TN) *Corresponding author Citation: Sawada N, Toyohara H, Miyai T, Nakano T (2020) Further records of Abstract introduced Semisulcospira snails in Japan (Mollusca, Gastropoda): implications for Seven species of the freshwater snail genus Semisulcospira, which are indigenous these snails’ correct morphological taxa of the largest lake in Japan, Lake Biwa, have been introduced into 17 localities, identification. BioInvasions Records 9(2): including five newly recorded localities. Among these species, S. dilatata Watanabe 310–319, https://doi.org/10.3391/bir.2020.9.2.16 and Nishino, 1995, S.
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  • Molecular Phylogenetic Relationship of Thiaridean Genus Tarebia Lineate
    Journal of Entomology and Zoology Studies 2017; 5(3): 1489-1492 E-ISSN: 2320-7078 P-ISSN: 2349-6800 Molecular phylogenetic relationship of Thiaridean JEZS 2017; 5(3): 1489-1492 © 2017 JEZS genus Tarebia lineate (Gastropoda: Cerithioidea) Received: 23-03-2017 Accepted: 24-04-2017 as determined by partial COI sequences Chittaranjan Jena Department of Biotechnology, Vignan’s University (VFSTRU), Chittaranjan Jena and Krupanidhi Srirama Vadlamudi, Andhra Pradesh, India Abstract An attempt was made to investigate phylogenetic affinities of the genus Tarebia lineata sampled from Krupanidhi Srirama the Indian subcontinent using partial mitochondrial COI gene sequence. The amplified partial mt-COI Department of Biotechnology, gene sequence using universal primers, LCO1490 and HCO2198 resulted into ~700 base pair DNA Vignan’s University (VFSTRU), Vadlamudi, Andhra Pradesh, fragment. The obtained nucleotide sequence of partial COI gene of T. lineata was submitted to BLAST India analysis and 36 close relative sequences of the chosen genera, Cerithioidea were derived. Maximum likelihood (ML) algorithm in-biuilt in RAxML software tool was used to estimate phylogenetic their affinities. The present analysis revealed that a single assemblage of the family Thiaridae supported by a bootstrap value of 96% is earmarked at the base of the derived cladogram as a cluster and emerged as a sister group with another four Cerithioideans. Our dataset brought add-on value to the current taxonomy of Thiaridae of the clade Sorbeconcha by clustering them as sister and non-sister groups indicating the virtual relations. Out of seven genera, Tarebia and Melanoides formed as primary and secondary clusters within the Thiaridae. The monophyly of Thiaridae and its conspecifics were depicted in the cladogram.
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  • Effects of Trematode Infection on Metabolism and Activity in a Freshwater Snail, Semisulcospira Libertina
    DISEASES OF AQUATIC ORGANISMS Vol. 45: 141–144, 2001 Published June 20 Dis Aquat Org Effects of trematode infection on metabolism and activity in a freshwater snail, Semisulcospira libertina Kazuko Shinagawa*, Misako Urabe**, Makoto Nagoshi*** Department of Biological Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan ABSTRACT: Changes in the metabolism and activity of the freshwater snail Semisulcospira libertina infected with larval trematodes were studied experimentally. In snails up to 11 mm in shell width, crawling distance, feeding frequency, and the proportion of individuals located on vertical walls did not differ among snails infected with mature or immature cercariae, or uninfected snails (p > 0.05). In snails larger than 11 mm, individuals infected with mature cercariae tended to feed more frequently during the light period (p = 0.0081), but the distance they crawled and the proportion of individuals located on vertical walls did not differ, regardless of infection (p > 0.05). Infection with mature cer- cariae significantly increased the oxygen consumption rate (p = 0.016), which was measured only in the large size. KEY WORDS: Semisulcospira libertina · Larval trematodes · Activity · Metabolism Resale or republication not permitted without written consent of the publisher INTRODUCTION of many species of trematodes (Ito 1964, 1988). We reported that snails infected with larval trematodes Many studies have reported the behavioral alter- were found in deeper locations than uninfected snails ation of hosts caused by parasitic infection and inter- (Shinagawa et al. 1999a). The pattern of water depth pret this as an induced adaptation by parasites to selection by infected and uninfected snails also dif- facilitate transfer to the next-stage hosts.
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  • Comparative Characterization of the Complete Mitochondrial Genomes of the Three Apple Snails (Gastropoda: Ampullariidae) and the Phylogenetic Analyses
    International Journal of Molecular Sciences Article Comparative Characterization of the Complete Mitochondrial Genomes of the Three Apple Snails (Gastropoda: Ampullariidae) and the Phylogenetic Analyses Huirong Yang 1,2, Jia-en Zhang 3,*, Jun Xia 2,4 , Jinzeng Yang 2 , Jing Guo 3,5, Zhixin Deng 3,5 and Mingzhu Luo 3,5 1 College of Marine Sciences, South China Agricultural University, Guangzhou 510640, China; [email protected] 2 Department of Human Nutrition, Food and Animal Sciences, University of Hawaii at Manoa, Honolulu, HI 96822, USA; [email protected] (J.X.); [email protected] (J.X.) 3 Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China; [email protected] (J.G.); [email protected] (Z.D.); [email protected] (M.L.) 4 Xinjiang Acadamy of Animal Sciences, Institute of Veterinary Medicine (Research Center of Animal Clinical), Urumqi 830000, China 5 Guangdong Engineering Research Center for Modern Eco-Agriculture and Circular Agriculture, Guangzhou 510642, China * Correspondence: [email protected]; Tel.: +86-20-85285505; Fax: +86-20-85285505 Received: 11 October 2018; Accepted: 2 November 2018; Published: 19 November 2018 Abstract: The apple snails Pomacea canaliculata, Pomacea diffusa and Pomacea maculate (Gastropoda: Caenogastropoda: Ampullariidae) are invasive pests causing massive economic losses and ecological damage. We sequenced and characterized the complete mitochondrial genomes of these snails to conduct phylogenetic analyses based on comparisons with the mitochondrial protein coding sequences of 47 Caenogastropoda species. The gene arrangements, distribution and content were canonically identical and consistent with typical Mollusca except for the tRNA-Gln absent in P. diffusa.
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  • Seasonal Reproductive Anatomy and Sperm Storage in Pleurocerid Gastropods (Cerithioidea: Pleuroceridae) Nathan V
    989 ARTICLE Seasonal reproductive anatomy and sperm storage in pleurocerid gastropods (Cerithioidea: Pleuroceridae) Nathan V. Whelan and Ellen E. Strong Abstract: Life histories, including anatomy and behavior, are a critically understudied component of gastropod biology, especially for imperiled freshwater species of Pleuroceridae. This aspect of their biology provides important insights into understanding how evolution has shaped optimal reproductive success and is critical for informing management and conser- vation strategies. One particularly understudied facet is seasonal variation in reproductive form and function. For example, some have hypothesized that females store sperm over winter or longer, but no study has explored seasonal variation in accessory reproductive anatomy. We examined the gross anatomy and fine structure of female accessory reproductive structures (pallial oviduct, ovipositor) of four species in two genera (round rocksnail, Leptoxis ampla (Anthony, 1855); smooth hornsnail, Pleurocera prasinata (Conrad, 1834); skirted hornsnail, Pleurocera pyrenella (Conrad, 1834); silty hornsnail, Pleurocera canaliculata (Say, 1821)). Histological analyses show that despite lacking a seminal receptacle, females of these species are capable of storing orientated sperm in their spermatophore bursa. Additionally, we found that they undergo conspicuous seasonal atrophy of the pallial oviduct outside the reproductive season, and there is no evidence that they overwinter sperm. The reallocation of resources primarily to somatic functions outside of the egg-laying season is likely an adaptation that increases survival chances during winter months. Key words: Pleuroceridae, Leptoxis, Pleurocera, freshwater gastropods, reproduction, sperm storage, anatomy. Résumé : Les cycles biologiques, y compris de l’anatomie et du comportement, constituent un élément gravement sous-étudié de la biologie des gastéropodes, particulièrement en ce qui concerne les espèces d’eau douce menacées de pleurocéridés.
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  • Nominal Taxa of Freshwater Mollusca from Southeast Asia Described by Dr
    Ecologica Montenegrina 41: 73-83 (2021) This journal is available online at: www.biotaxa.org/em http://dx.doi.org/10.37828/em.2021.41.11 https://zoobank.org/urn:lsid:zoobank.org:pub:2ED2B90D-4BF2-4384-ABE2-630F76A1AC54 Nominal taxa of freshwater Mollusca from Southeast Asia described by Dr. Nguyen N. Thach: A brief overview with new synonyms and fixation of a publication date IVAN N. BOLOTOV1,2, EKATERINA S. KONOPLEVA1,2,*, ILYA V. VIKHREV1,2, MIKHAIL Y. GOFAROV1,2, MANUEL LOPES-LIMA3,4,5, ARTHUR E. BOGAN6, ZAU LUNN7, NYEIN CHAN7, THAN WIN8, OLGA V. AKSENOVA1,2, ALENA A. TOMILOVA1, KITTI TANMUANGPAK9, SAKBOWORN TUMPEESUWAN10 & ALEXANDER V. KONDAKOV1,2 1N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, Northern Dvina Emb. 23, 163000 Arkhangelsk, Russia. 2Northern Arctic Federal University, Northern Dvina Emb. 17, 163002 Arkhangelsk, Russia. 3CIBIO/InBIO – Research Center in Biodiversity and Genetic Resources, University of Porto, Campus Agrário de Vairão, Rua Padre Armando Quintas 7, 4485-661 Vairão, Portugal. 4CIIMAR/CIMAR – Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, 4450-208 Matosinhos, Portugal. 5SSC/IUCN – Mollusc Specialist Group, Species Survival Commission, International Union for Conservation of Nature, c/o The David Attenborough Building, Pembroke Street, CB2 3QZ Cambridge, United Kingdom. 6North Carolina Museum of Natural Sciences, 11 West Jones St., Raleigh, NC 27601, United States of America 7Fauna & Flora International – Myanmar Programme, Yangon, Myanmar. 8 Department of Zoology, Dawei University, Dawei, Tanintharyi Region, Myanmar.
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