Malacologia最新文献_第10页

Burnupia ingae Lanzer, 1991 (Gastropoda: Hygrophila): Contributions to the Knowledge on Its Morphology and First Records in Rio De Janeiro State, Brazil Burnupia ingae Lanzer, 1991(腹足目:亲水目):对其形态和首次记录的贡献

IF 1.3 4区生物学

Malacologia Pub Date : 2016-12-01 DOI: 10.4002/040.059.0211

X. Ovando, L. E. M. Lacerda, Roberta da Roza Dutra, S. Santos

{"title":"Burnupia ingae Lanzer, 1991 (Gastropoda: Hygrophila): Contributions to the Knowledge on Its Morphology and First Records in Rio De Janeiro State, Brazil","authors":"X. Ovando, L. E. M. Lacerda, Roberta da Roza Dutra, S. Santos","doi":"10.4002/040.059.0211","DOIUrl":"https://doi.org/10.4002/040.059.0211","url":null,"abstract":"Burnupia Walker, 1912, is a genus of freshwater limpet traditionally considered as belonging to the Ancylidae (Pilsbry & Bequaert, 1927; Hubendick, 1964; Brown, 1994; Lanzer, 1996; Hodgson & Healy, 1998), or included in the tribe Ancylini in the superfamily Planorboidea (Bouchet & Rocroi, 2005). However, its taxonomic position is controversial: based on similarity of radula morphology Pilsbry (1920) suggested a close relationship between Burnupia and South American Uncancylus Pilsbry, 1913. Brown (1965) placed this genus into the family Ferrissiidae, whereas Burch (1962) proposed a close relationship between Burnupia and Laevapex forming the subfamily Laevapecinae on the basis of the haploid chromosome number 17. Albrecht et al. (2004) tested whether the shell shape of Burnupia evolved independently and inferred its position within the Basommatophora. They concluded that the patelliform shell shape evolved at least three times in the Basommatophora, as previously proposed by Hubendick (1978), representing cases of convergent evolution. Currently, Burnupia is considered outside the Ancylinae according to Albrecht et al. (2007), who suggested a new “unnamed clade” for this genus. Burnupia not only appears to be distinct from the Ancylinae but also from all other representatives of the superfamily Planorboidea (Albrecht et al., 2007). In reference to the distribution of Burnupia, it has long been considered endemic to Africa (Basch, 1963; Wright, 1963; Hubendick, 1964; Albrecht et al., 2004), ranging from the highlands of Ethiopia and East Africa, southwards into Zaire, Angola and Zimbabwe, and widespread in South Africa (Walker, 1924; Hubendick, 1964). Subfossil MALACOLOGIA, 2016, 59(2): 333−339","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4002/040.059.0211","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70086486","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

Observations on Growth Rates and Maturity in an Introduced Population of the Roman Snail (Helix pomatia Linnaeus, 1758) at a Semi-Natural Site with no Natural Population 在半自然地点无自然种群的罗马蜗牛(Helix pomatia Linnaeus, 1758)引种种群的生长速率和成熟度观察

IF 1.3 4区生物学

Malacologia Pub Date : 2016-12-01 DOI: 10.4002/040.059.0212

M. Ligaszewski, P. Pol, I. Radkowska

{"title":"Observations on Growth Rates and Maturity in an Introduced Population of the Roman Snail (Helix pomatia Linnaeus, 1758) at a Semi-Natural Site with no Natural Population","authors":"M. Ligaszewski, P. Pol, I. Radkowska","doi":"10.4002/040.059.0212","DOIUrl":"https://doi.org/10.4002/040.059.0212","url":null,"abstract":"Helix pomatia Linnaeus, 1758, the Roman snail, is widely exploited for food in Europe. Over-exploitation has led to protective measures laid down in the European Union Habitats Directive (European Community Directive on the Conservation of Natural Habitats and of Wild Fauna and Flora (92/43/EEC). In Poland, the implementation of this directive has involved passive protection by means of closed seasons for collecting, minimum size limits and annual rotation of areas in which collecting is permitted (Dyduch-Falniowska et al., 2001). The size limit (minimum shell diameter of 30 mm) has not changed for several decades. Helix pomatia has relatively slow reproductive and maturation rates (Ligaszewski et al., 2014). Efforts have been made to improve these under controlled conditions (Jeppensen, 1976; Gomot, 1990; Chmielewski, 2005). In experiments at the National Research Institute of Animal Production in Balice, Poland, mature H. pomatia taken from the wild and kept in greenhouses reproduced successfully, producing large numbers of hatchlings both in autumn and after the winter hibernation (Ligaszewski et al., 2007). While rearing snails in such conditions over the whole of their life cycle (eggs to harvested adults) is expensive, the release of juveniles into apparently suitable habitats might increase the number of natural populations and serve to secure the snail’s future in the face of exploitation. This study thus set out to determine the fate of juveniles reared in greenhouses and released into a semi-natural, synanthropic site in which the snail was absent. A target area was modified to provide good starting conditions, and the growth rate and dispersal of the introduced juveniles studied over the period 2011–2015. In particular, the study aimed to MALACOLOGIA, 2016, 59(2): 341−346","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4002/040.059.0212","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70086039","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: 4

Physa acuta Draparnaud, 1805 Should be Treated as a Native of North America, Not Europe 1805年的Physa acuta Draparnaud应该被视为北美人，而不是欧洲人

IF 1.3 4区生物学

Malacologia Pub Date : 2016-12-01 DOI: 10.4002/040.059.0213

C. Lydeard, D. Campbell, Michelle Golz

{"title":"Physa acuta Draparnaud, 1805 Should be Treated as a Native of North America, Not Europe","authors":"C. Lydeard, D. Campbell, Michelle Golz","doi":"10.4002/040.059.0213","DOIUrl":"https://doi.org/10.4002/040.059.0213","url":null,"abstract":"ABSTRACT Physa acuta (Gastropoda: Heterobranchia: Physidae) is a freshwater snail commonly found in North American rivers, streams and ponds. Despite its widespread distribution across the United States, it is generally regarded as an invasive species. As a result, P. acuta receives no attention during conservation management inventories. However, data suggest that P. acuta may be a native to North America rather than to Europe, where it was first described. First, the fossil record in Europe lacks P. acuta, whereas North America is home to numerous fossils of members of the acuta species group. Second, breeding studies among P. acuta and North American taxa from the acuta species group show no evidence of pre- or postzygotic isolation. Third, investigations of reproductive anatomy between P. acuta and other nominal species of the acuta species group are indistinguishable, leading investigators to synonymize taxa. Finally, phylogenetic data do not support the distinction of P. acuta from its North American congeners of the same species group. Together, these data support our case that P. acuta is a North American native.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4002/040.059.0213","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70086184","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: 24

Population Genetic Structure of the Blood Clam, Tegillarca granosa, Along the Pacific Coast of Asia: Isolation by Distance in the Sea 亚洲太平洋沿岸血蛤的种群遗传结构:海洋中的距离隔离

IF 1.3 4区生物学

Malacologia Pub Date : 2016-12-01 DOI: 10.4002/040.059.0208

Y. Shao, X. Chai, Guo-qiang Xiao, Jiong-ming Zhang, Zhihua Lin, G. Liu

{"title":"Population Genetic Structure of the Blood Clam, Tegillarca granosa, Along the Pacific Coast of Asia: Isolation by Distance in the Sea","authors":"Y. Shao, X. Chai, Guo-qiang Xiao, Jiong-ming Zhang, Zhihua Lin, G. Liu","doi":"10.4002/040.059.0208","DOIUrl":"https://doi.org/10.4002/040.059.0208","url":null,"abstract":"ABSTRACT The blood clam, Tegillarca granosa, is widely distributed along the coasts of the Indo-Pacific region, providing an excellent opportunity to study gene flow in sessile marine mollusks. In the present study, amplified fragment length polymorphism (AFLP) DNA markers were used to analyze the genetic structure of five blood clam populations. Genetic differentiation (Gst) and Nei's genetic distances between population pairs were found to range from 0.0245 to 0.0785 and 0.0398 to 0.1125, respectively. An AMOVA analysis showed that 89.09% of the genetic variation occurred within populations and only 10.92% occurred among populations, indicating a high degree of genetic homogeneity, probably due to considerable gene flow (average Nm = 7.1853) among populations. Cluster analysis using the unweighted pair group method average (UPGMA) showed that geographically closer populations were clustered, suggesting isolation by distance, which was further supported by a significant positive correlation between Gst and logit transformed geographic distance through a Mantel test and reduced major axis regression (r = 0.77, p < 0.05). The evident isolation by distance observed among blood clam populations along the Pacific coast of Asia is likely to be a consequence of both the passive larval dispersal carried by the South China Sea Warm Current and the genetic homogeneity caused by aquaculture-associated human activities.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4002/040.059.0208","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70086435","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: 32

Spine Formation as a Hatching Tool in Euprymna scolopes (Mollusca, Cephalopoda, Sepiolidae) 软体动物，头足纲，棘足动物科棘足动物的孵化工具

IF 1.3 4区生物学

Malacologia Pub Date : 2016-12-01 DOI: 10.4002/040.059.0204

J. Byern, A. Kerbl, Marie-Therese Nödl, G. Bello, Y. Staedler, J. Schönenberger, N. Cyran

{"title":"Spine Formation as a Hatching Tool in Euprymna scolopes (Mollusca, Cephalopoda, Sepiolidae)","authors":"J. Byern, A. Kerbl, Marie-Therese Nödl, G. Bello, Y. Staedler, J. Schönenberger, N. Cyran","doi":"10.4002/040.059.0204","DOIUrl":"https://doi.org/10.4002/040.059.0204","url":null,"abstract":"ABSTRACT The hatching of an embryo from its egg is a crucial point in its development. This is the moment that decides whether the animal will be able to emerge and survive or whether it will remain trapped and die. Cephalopods usually produce enzymes in a system of glands known as the Hoyle organ, which weakens the chorion and enables hatching. In addition to this chemical approach, four cephalopod genera develop a terminal spine to further support the hatching process. The presence of such a spine has been mentioned for the well-known cephalopod species Euprymna scolopes. However, little is known about either its structure or its cellular details. Our present results indicate that the spine consists purely of musculature, and no intermediate connective tissue was observed. No nerves were detected within the spine, although nerve fibers are present within the surrounding epithelium and dermal muscle layer, indicating that the spine stretching is controlled by this dermal musculature. Our data show that the spine of Euprymna is similar in its composition to those of the other three cephalopod genera in which a spine has evolved. However, we found morphological differences in the spine tip and in a collagenous layer located between the spine and the normal epithelium. It remains unclear why two completely different but synergetic systems for hatching, the glandular Hoyle organ and a spine, exist in some, but not all, cephalopod genera.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4002/040.059.0204","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70086311","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

Variation in the Sex Ratio of Apple Snails (Pomacea spp.) in Their Native Range 苹果螺(Pomacea spp.)原产地性别比例的变异

IF 1.3 4区生物学

Malacologia Pub Date : 2016-12-01 DOI: 10.4002/040.059.0205

Y. Yusa, J. Kitaura, N. J. Cazzaniga

引用次数: 4

Cold Snails in Hot Springs: Observations from Patagonia and the Tibetan Plateau 温泉中的冷蜗牛:来自巴塔哥尼亚和青藏高原的观测

IF 1.3 4区生物学

Malacologia Pub Date : 2016-12-01 DOI: 10.4002/040.059.0209

Parm Viktor von Oheimb, Lukas Landler, Katharina C. M. von Oheimb

{"title":"Cold Snails in Hot Springs: Observations from Patagonia and the Tibetan Plateau","authors":"Parm Viktor von Oheimb, Lukas Landler, Katharina C. M. von Oheimb","doi":"10.4002/040.059.0209","DOIUrl":"https://doi.org/10.4002/040.059.0209","url":null,"abstract":"ABSTRACT Patagonia and the Tibetan Plateau both harbor various freshwaters with relatively low temperatures. Pulmonate freshwater gastropods are widely distributed in these water bodies. Both regions, however, also possess a number of geothermal hot springs. Such springs might have served as refugia for freshwater taxa during the Pleistocene. In the present study, two hot spring systems, one in Patagonia and one at the Tibetan Plateau, were examined. Individuals of Chilina patagonica (in Patagonia) as well as Radix cf. auricularia and Gyraulus sp. (at the Tibetan Plateau) were found living in the warm water. These taxa typically live at much lower water temperatures. At the Patagonian hot spring system, gastropods occurred continuously from warm to cold water. Analyses of mitochondrial DNA sequence data revealed very close relationships of Tibetan Plateau hot spring gastropods to cold water populations. Acclimatization and not adaptation is thus probably the main thermal adjustment process involved. Given these findings, it is plausible that hot springs have served as glacial refugia for these freshwater gastropods.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4002/040.059.0209","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70086448","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: 6

Letter from the Editor 编辑来信

IF 1.3 4区生物学

Malacologia Pub Date : 2016-01-01 DOI: 10.4002/040.059.0214

G. M. Davis

引用次数: 0

Comparative morphology of the radulae and alimentary tracts in the Aplacophora 食蚜目食道和食道的比较形态学

IF 1.3 4区生物学

Malacologia Pub Date : 1981-01-01 DOI: 10.5962/BHL.PART.11943

A. Scheltema