Malacologia最新文献_第7页

The Correlation of Topographically-Derived Relative Wetness with Terrestrial Mollusk Presence and Abundance 地形相对湿度与陆生软体动物存在和丰度的相关性

IF 1.3 4区生物学

Malacologia Pub Date : 2019-03-01 DOI: 10.4002/040.062.0203

M. Emery-Wetherell, C. Mathew, Cameron Church, Ellie Dellard, E. Davis, J. Roering

{"title":"The Correlation of Topographically-Derived Relative Wetness with Terrestrial Mollusk Presence and Abundance","authors":"M. Emery-Wetherell, C. Mathew, Cameron Church, Ellie Dellard, E. Davis, J. Roering","doi":"10.4002/040.062.0203","DOIUrl":"https://doi.org/10.4002/040.062.0203","url":null,"abstract":"ABSTRACT Many species of terrestrial mollusks are small and difficult to find, with poorly known ranges and habitat preferences. Because desiccation is a primary cause of mortality for many terrestrial mollusks, incorporating wetness as a habitat variable may improve survey results for different species. We compared presence and abundance data from terrestrial mollusk surveys in Tillamook Resource Area to two measures of relative wetness: topographic wetness index (TWI) and geomorphic features (landslides, debris-flow channels, etc.). Hurdle Model regression revealed a positive correlation between increased TWI and likelihood of presence or abundance for four species, and a negative correlation for six species. Overall species diversity and total mollusk count were negatively correlated with increased TWI, but the effect size was small (p = 0.02, R2= -0.03). Our Kruskal-Wallis Analysis of Variance of TWI between species was significant (p < 0.001), indicating terrestrial mollusks occupy significantly different wetness regimes – but this relationship was driven entirely by the wetness specialization of Hemphillia glandulosa. Our chi-square analysis of topographic features found significant preferences of different species for different topographic types, which correlated loosely but not precisely to the preferences indicated by TWI. These results show that altering current terrestrial mollusk survey protocol to include geomorphic features, which are simpler and less time-intensive than calculating TWI, would increase detection likelihood of certain species, including Hemphillia glandulosa, a species protected under the Survey and Manage guidelines of the Northwest Forest Plan.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":"62 1","pages":"225 - 236"},"PeriodicalIF":1.3,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47505806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Status of Rare Endemic Species: Molecular Phylogeny, Distribution and Conservation of Freshwater Molluscs Truncilla macrodon and Truncilla cognata in Texas 珍稀特有物种现状:德克萨斯州淡水软体动物大截尾和同源截尾的分子系统发育、分布和保护

IF 1.3 4区生物学

Malacologia Pub Date : 2019-03-01 DOI: 10.4002/040.062.0210

L. Burlakova, D. Campbell, A. Karatayev

{"title":"Status of Rare Endemic Species: Molecular Phylogeny, Distribution and Conservation of Freshwater Molluscs Truncilla macrodon and Truncilla cognata in Texas","authors":"L. Burlakova, D. Campbell, A. Karatayev","doi":"10.4002/040.062.0210","DOIUrl":"https://doi.org/10.4002/040.062.0210","url":null,"abstract":"ABSTRACT Freshwater bivalves in the family Unionidae are one of the most endangered groups of animals in North America. In Texas, where over 60% of unionids are rare or very rare, 15 species have been added to the state's list of threatened species, and 10 are under consideration for federal listing. Due to insufficient survey efforts in the past decades, however, primary data on current distribution and habitat requirement for most of these rare species are lacking, thus challenging their protection and management. Although the species are listed as valid, there was no genetic confirmation to test for the possibility of ecophenotypes, which complicates conservation efforts. In this paper, we present genetic and distributional data for two rare Texas species, Truncilla macrodon and Truncilla cognata, and we suggest appropriate conservation measures. Tests of genetic affinities of these species using three gene regions, cox1, nad1 and ITS1, supported recognition of T. cognata and T. macrodon as full species. Analysis of historic and current species distribution showed that both these regional endemics are particularly vulnerable, and their distribution range has been reduced in the last 80 years.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":"62 1","pages":"345 - 363"},"PeriodicalIF":1.3,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42100055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

John Clarkson Jay (1808–1891): His Life and Malacological Contributions 约翰·克拉克森-周（1808–1891）：他的生平和马六甲学的贡献

IF 1.3 4区生物学

Malacologia Pub Date : 2019-03-01 DOI: 10.4002/040.062.0206

A. Kabat, E. Coan

引用次数: 0

A New Species of the Genus Bunnya H. B. Baker, 1942 (Helicoidea) from MÉXico Bunnya H.B.Baker属一新种，1942（Helicoidea），来自墨西哥

IF 1.3 4区生物学

Malacologia Pub Date : 2019-03-01 DOI: 10.4002/040.062.0204

Victoria Araiza-Gómez, Zaidett Barrientos-Llosa, E. A. Ruíz, G. Zúñiga

{"title":"A New Species of the Genus Bunnya H. B. Baker, 1942 (Helicoidea) from MÉXico","authors":"Victoria Araiza-Gómez, Zaidett Barrientos-Llosa, E. A. Ruíz, G. Zúñiga","doi":"10.4002/040.062.0204","DOIUrl":"https://doi.org/10.4002/040.062.0204","url":null,"abstract":"ABSTRACT We describe a new helicoidean semi-slug based on morphological and molecular evidence. The new species belongs to the genus Bunnya and is described from a small agricultural area in Zinacantepec, San Juan de las Huertas, México. The genus Bunnya is externally similar to Xanthonyx, another Helicoidea genus; both genera have similar shell and body form, and both have a tail horn. Internally, Bunnya is similar to Humboldtiana, since both have dart-sacs (3 in Bunnya, 3−4 in Humboldtiana) surrounding the vagina, two dart-bulbs associated with each dart sac, and a gland number similar to the dart-sacs number. Four adult specimens of Bunnya metli n. sp. were dissected and compared with the two described species: B. bernardinae from Cuajimalpa, México City, and B. naranjoe from Sierra de Manantlan, Jalisco. Bunnya metli n. sp. is characterized by: very closely-spaced radial riblets (about 23 per mm) crossed by fine spiral wavy threads on the embryonic whorls; unfused glands inserted on the vagina above the dart-sacs and only one dart per sac; a short, swollen penis with a large spherical verge about half the penis size; an elongated bursa copulatrix with a slight constriction in the middle; a long bursa copulatrix duct; and dart sacs with a muscular pad within the vaginal lumen, surrounding the basal part of the genitalia. We performed a phylogenetic analyses using data from fragments of 16S rRNA mtDNA and 28S rRNA genes from one of the collected specimens, as well as other helicoidean sequences from GenBank. Our analyses support the membership of Bunnya metli n. sp. in Xanthonychidae. This suggests that the taxonomic position of Bunnya in Humboldtianidae or Xanthonychidae warrants reevaluation.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":"62 1","pages":"237 - 246"},"PeriodicalIF":1.3,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45910125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Candidate Calcium-Binding Genes for Chemical Boring in the Date Mussel Lithophaga lithophaga 枣贻贝化学钻孔候选钙结合基因研究

IF 1.3 4区生物学

Malacologia Pub Date : 2019-03-01 DOI: 10.4002/040.062.0208

U. Sivka

引用次数: 1

Environmental Emergency: Why Did the False Mussel Mytilopsis sallei Not Invade Darwin Harbour, Australia? 环境紧急事件：为什么假贻贝没有入侵澳大利亚达尔文港？

IF 1.3 4区生物学

Malacologia Pub Date : 2019-03-01 DOI: 10.4002/040.062.0205

F. Wells

引用次数: 1

Nomenclature of Genus-Group Names of Recent Asian Paludomidae (Gastropoda: Cerithioidea), with a Revision of Paludomus (Odontochasma) Stomatodon (Benson, 1862) from the Western Ghats, India 最近亚洲Paludomidae的属群命名(腹足目:cerithio总科)，并对印度西高止山脉Paludomus (Odontochasma) Stomatodon (Benson, 1862)的修订

IF 1.3 4区生物学

Malacologia Pub Date : 2019-03-01 DOI: 10.4002/040.062.0209

M. Neiber, M. Glaubrecht

{"title":"Nomenclature of Genus-Group Names of Recent Asian Paludomidae (Gastropoda: Cerithioidea), with a Revision of Paludomus (Odontochasma) Stomatodon (Benson, 1862) from the Western Ghats, India","authors":"M. Neiber, M. Glaubrecht","doi":"10.4002/040.062.0209","DOIUrl":"https://doi.org/10.4002/040.062.0209","url":null,"abstract":"ABSTRACT The Oriental region is among the world's biologically most diverse regions, but also among the most biotically threatened, especially with regard to freshwater biota. The Cerithioidea comprise several families and are a major component of the freshwater gastropod fauna in the Oriental region. Among these, the Paludomidae include numerous taxa mostly described in the 19thcentury that are in many cases badly in need of revision. As an initial step towards a better understanding of the evolutionary systematics of the family, we here review the genus-group taxonomy and nomenclature of Asian Paludomidae. We show that Paludomus Swainson, 1840, Philopotamis Layard, 1855, Ganga Layard, 1855, and Odontochasma Tomlin, 1930, are available names for morphology-based genus-group taxa of Asian Paludomidae. By selection of Melania modicella I. Lea & H. C. Lea, 1851, as type species of Rivulina I. Lea & H. C. Lea, 1851, and by the designation of a neotype for Paludomus (Hemimitra) retusa Swainson, 1840, Rivulina and Hemimitra Swainson, 1840, can both be regarded as synonyms of Paludomus s. str. By selection of Paludomus sulcatus Reeve, 1847, as its type species, Heteropoma Benson, 1856, becomes an objective junior synonym of Philopotamis Layard, 1855. Furthermore, we show that the type species of Tanalia Gray, 1847, which has often been used for a subdivision of Paludomus or as a distinct genus, belongs to the Neritidae and that Odontochasma Tomlin, 1930, has been validly proposed as a replacement name for the preoccupied name Stomatodon Benson, 1862. Finally, we revise Paludomus (Odontochasma) stomatodon Benson, 1862, on the basis of available type material, describe its radula for the first time, and compare it with published data on radulae of other Asian paludomids. Taxonomic redundancy in the genus-group in Asian Paludomidae is estimated to be 50% and may be as high as 88% depending on taxonomic opinion.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":"62 1","pages":"329 - 344"},"PeriodicalIF":1.3,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48405509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Ongoing Westward Expansion of the Carpathian Blue Slug Bielzia coerulans into Central Europe 喀尔巴阡蓝蛞蝓向中欧的持续向西扩张

IF 1.3 4区生物学

Malacologia Pub Date : 2019-03-01 DOI: 10.4002/040.062.0212

B. Hausdorf, M. Würmli

{"title":"Ongoing Westward Expansion of the Carpathian Blue Slug Bielzia coerulans into Central Europe","authors":"B. Hausdorf, M. Würmli","doi":"10.4002/040.062.0212","DOIUrl":"https://doi.org/10.4002/040.062.0212","url":null,"abstract":"Increasing traffic and trade, the modification of landscapes by humans, and climate change facilitate the dispersal of certain species that are adapted to anthropogenic habitats. When species’ natural dispersal limitations are overridden by human-mediated dispersal, the composition of communities can be determined by the prevailing climate, rather than reflecting biogeographic realms, as has been shown for terrestrial snails (Capinha et al., 2015). The size of a species’ native range affects the probability that it will become invasive (Pyšek et al., 2009). Thus, endemic species with small geographic ranges rarely become invasive. Here we report a new record of the Carpathian blue slug Bielzia coerulans (Bielz, 1851) (Gastropoda: Limacidae) from the Bavarian Forest in Germany, which together with other records might indicate an ongoing expansion of this characteristic representative of the Carpathian fauna westward. The discovery of Bielzia coerulans was a fortuitous result of entomological excursions in the Bavarian Forest in southern Germany. The identification of the species was based on the external morphology (Fig. 1) in accordance with characteristics given by Wiktor (1989) and Wiese & von Glasow (2013). A single adult specimen of the Carpathian blue slug Bielzia coerulans (Fig. 1) was discovered under a large stone in the nature reserve “Pfahl bei der Ruine Weißenstein” about 800 m southeast of Regen-Weißenstein (48°56’38.87”N, 13°09’29.16”E), at 710 m a.s.l., in the Bavarian Forest in Germany on 9 August 2017 by the second author. The specimen was immediately identified by its characteristic blue colour and recorded. Further searching did not result in the discovery of additional specimens. MALACOLOGIA, 2019, 62(2): 373–375","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":"62 1","pages":"373 - 375"},"PeriodicalIF":1.3,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41637372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Through the Looking-Glass: Shell Morphology, Anatomy and Mating Behavior of Reversed Pomacea Canaliculata (Caenogastropoda, Ampullariidae) 镜中透视:倒转型小管Pomacea Canaliculata(壶足目，壶足科)的壳形态、解剖和交配行为

IF 1.3 4区生物学

Malacologia Pub Date : 2019-03-01 DOI: 10.4002/040.062.0201

N. Tamburi, S. Burela, Martín A. Carrizo, P. Martín

{"title":"Through the Looking-Glass: Shell Morphology, Anatomy and Mating Behavior of Reversed Pomacea Canaliculata (Caenogastropoda, Ampullariidae)","authors":"N. Tamburi, S. Burela, Martín A. Carrizo, P. Martín","doi":"10.4002/040.062.0201","DOIUrl":"https://doi.org/10.4002/040.062.0201","url":null,"abstract":"ABSTRACT Snails exhibit a primary left-right asymmetry that appears during the first cleavages of the eggs, and a secondary asymmetry, related to the coiling of the shell. Most species are constituted by either dextral or sinistral morphs (enantiomorphs) while individuals with reversed primary asymmetry are extremely rare. Freshwater snails of the family Ampullariidae are normally dextral enantiomorphs with planispiral, hyperstrophic or orthostrophic shells. Pomacea canaliculata, a well-studied species because of its invasive status, shows dextral primary asymmetry and orthostrophic growth that results in clock-wise shells. Despite the great number of studies focused on P. canaliculata, only two specimens with reversed asymmetry have been hitherto reported. Here we report the finding of two live snails and three empty shells of P. canaliculata with anti-clockwise coiling that appeared in two populations from the southern Pampas, Argentina. Both anti-clockwise live snails were males that attempted to copulate with clock-wise females in the laboratory but failed to inseminate them. The apex of anti-clockwise shells and the anatomy of the snails revealed that the reversal of coiling was due to an orthostrophic development of sinistral enantiomorphs. Morphological analysis performed through geometric morphometrics did not find other differences with clock-wise snails other than coiling direction. We conclude that these anti-clockwise snails are probably engendered, as in other snails species, when the mother is a recessive homozygote for reversing alleles that show delayed maternal inheritance. The chances of establishment of populations with dimorphic asymmetry are very low because of the reproductive disadvantages of anti-clockwise individuals.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":"62 1","pages":"205 - 214"},"PeriodicalIF":1.3,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42037226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrastructure of Sperm Development and Mature Sperm Morphology in Spondylus calcifer and S. Princeps (Bivalvia: Spondylidae) 钙化脊柱鱼和大头脊柱鱼精子发育和成熟精子形态的超微结构

IF 1.3 4区生物学

Malacologia Pub Date : 2018-05-30 DOI: 10.4002/040.062.0102

M. Villalejo-Fuerte, M. A. Camacho-Mondragón, B. Ceballos-Vázquez, E. O. López-Villegas, Esther Uría-Galicia, M. Arellano-Martínez

引用次数: 3