Malacologia最新文献

{"title":"Impact of Intertidal Distribution on the Physiological Performance of the Filter-Feeder Bivalve Perumytilus purpuratus (Bivalvia, Mytilidae) from Southern Chile","authors":"J. Montory, O. Chaparro, L. P. Salas-Yanquin, J. Büchner-Miranda, J. Pechenik, V. Cubillos","doi":"10.4002/040.064.0108","DOIUrl":"https://doi.org/10.4002/040.064.0108","url":null,"abstract":"ABSTRACT Intertidal animals experience reduced feeding times and differentiated respiratory capacity associated with aerial exposure, the duration of which depends on their location within the intertidal zone. Perumytilus purpuratus is a sessile mussel that forms dense mats in the rocky mid-intertidal in southern Chile. For this species, we documented the impact of different times of aerial exposure (3 and 6 h) on rates of oxygen consumption and feeding, according to their vertical location (upper and lower limits) within the intertidal zone. Mean oxygen consumption rates in air for individuals located in the upper intertidal zone were 52% higher than those of individuals located at the lower limits of their intertidal distribution. Additionally, individuals from the lower intertidal region always presented higher rates of oxygen consumption and particle clearance rates (58% higher and 18% higher, respectively) during immersion compared to individuals collected from the upper limit of their intertidal distribution, regardless of the duration of previous aerial exposure. Although we found no significant habitat-related differences in the relationship between shell length and gill surface area, individuals sampled from the lower intertidal zone were 8% heavier in dry tissue weight than individuals with the same shell lengths collected from of the upper limit of their intertidal distribution. Our results suggest that the individuals of this species near the upper limits of their intertidal distribution can probably compensate (e.g., higher absorption rate) for the reduced time that they have available for clearance, which might help them to avoid a major energetic disadvantage.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44314945","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}

{"title":"Letter from the Editor","authors":"윤나영, 김보경, 안성구","doi":"10.4002/040.064.0109","DOIUrl":"https://doi.org/10.4002/040.064.0109","url":null,"abstract":"","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70086944","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}

{"title":"Seasonal Dynamics of Oxidative and Antioxidative Parameters in Sadleriana fluminensis (Gastropoda: Hydrobiidae)","authors":"B. Kukavica, Biljana Davidović-Plavšić, D. Dmitrović, G. Šukalo, A. Savić, V. Pešić","doi":"10.4002/040.064.0102","DOIUrl":"https://doi.org/10.4002/040.064.0102","url":null,"abstract":"ABSTRACT This is the first study to document the seasonal dynamics of oxidative and antioxidative parameters in Sadleriana fluminensis (Küster, 1853). Sadleriana fluminensis mostly inhabits spring biotopes, which are threatened by anthropogenic activities. We reported changes in the malondialdehyde (MDA) content, activities of superoxide dismutase (SOD) and catalase (CAT), total antioxidative capacity (TAC), and the qualitative and quantitative composition of the soluble proteins in S. fluminensis. We collected samples from four sites along the longitudinal profile of the Krupa River in three seasons (autumn, winter, and spring). The amount of total soluble proteins and the qualitative protein composition varied seasonally at all sites. Detected protein bands were in the range of 103.8–5.7 kDa in all three seasons, whereas protein bands in the range of 105–60 kDa and 5–10 kDa were not detected in autumn or in spring. In all three seasons, the highest level of MDA was observed upstream at site 1. The values of TAC varied with site and season and were positively correlated to the soluble protein content. SOD activities were highest in winter, followed by autumn and spring; CAT activities were highest in spring, followed by winter and autumn. Principal component analysis based on oxidative and antioxidative parameters revealed marked differences between seasons. The results of this study enhance our understanding of the seasonal dynamics in protein composition and cell redox status within S. fluminensis and will aid future studies. The approach used in this study could also be applied more generally in other ecosystems for the monitoring of bioindicators.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44123014","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}

{"title":"Isaac Lea's (1792–1886) Substitutions and Other Modifications of His Own Names of Molluscan Species","authors":"R. Bieler","doi":"10.4002/040.064.0101","DOIUrl":"https://doi.org/10.4002/040.064.0101","url":null,"abstract":"ABSTRACT The American conchologist Isaac Lea had a long and productive career during which he introduced more than 1,800 names of molluscan species between 1827 and 1874, the majority North American land and freshwater species. His idiosyncratic way of publishing, by describing new taxa multiple times in duplicated and variously modified journal papers as well as in retitled collections of extracts, has led to considerable difficulties in determining accurate dates of his original descriptions. He considered the reading and presentation of a manuscript before a “learned society” as the date of its original publication and therefore his own recorded dates must be approached with caution. The problem of interpreting Lea's names was compounded by the fact that Lea frequently modified his own new taxonomic names in his subsequent publications, and often without providing justification for the change. The various name versions were inconsistently applied by subsequent authors. The current paper analyses Lea's substitutions and other modifications of his own names of molluscan species and discusses 131 of his publications in this context, for which attempts at precise dating were made. The status of these “replacements” of Lea's taxonomic names were evaluated under the current ICZN Code (1999). A few additional cases of changes of Lea's names by other authors are included; these are instances in which Lea had missed a primary homonym or a secondary homonym was discovered later. While some of the names here discussed are currently resting in synonymy, others are of greater current relevance as they are in use as valid names for taxa of conservation/management concern, including IUCN and U.S.-federally listed species. The following 98 discussions of often-complex name changes involve 348 species-group names and their subsequent spellings, 231 of which were introduced by Lea. Based on their current taxonomic status, the names belong to 4 bivalve and 11 gastropod families, with the vast majority concentrated in Unionidae and Pleuroceridae. Under the current ICZN Code, the investigated changes fall into many different categories, which impacts their nomenclatural availability: 35 names changed by Lea (plus 6 by other authors) are interpreted as substitute names for junior primary homonyms, 7 of which were unnecessary; 1 name (plus 6 by others) as substitute names for junior secondary homonyms, 1 of which was unnecessary; 13 names as justified emendations; 10 names (plus 1 by another) as unjustified emendations that have not entered prevailing usage; 1 name determined by his first reviser action; 37 names (plus many by others) as incorrect subsequent spellings that are not in prevailing usage; and 1 incorrect subsequent spelling that is shown to be in prevailing usage and thus considered a correct original spelling. The concept of “prevailing usage,” ill-defined under the current (1999) ICZN Code, is addressed in this context. The following names in current ","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44384788","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}

{"title":"Back Matter","authors":"","doi":"10.4002/040.064.0110","DOIUrl":"https://doi.org/10.4002/040.064.0110","url":null,"abstract":"","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44752676","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}

{"title":"Ontogenetic Shifts of Predatory Strategies by the Carnivorous Gastropod Acanthina monodon (Pallas, 1774)","authors":"J. Büchner-Miranda, L. P. Salas-Yanquin, A. Averbuj, J. Navarro, V. Cubillos, A. Matos, S. Zabala, O. Chaparro","doi":"10.4002/040.064.0105","DOIUrl":"https://doi.org/10.4002/040.064.0105","url":null,"abstract":"ABSTRACT Predatory strategies used by carnivorous gastropods may change during their ontogeny. In muricid gastropods attack mechanisms include an accessory boring organ (ABO), radula, labral tooth and/or pedal muscle. However, these mechanisms and their patterns of use in relation to the ontogeny of the carnivorous gastropod remain uncertain. We studied the occurrence of shifts in predatory strategies through the ontogeny of the gastropod Acanthina monodon preying on the mytilid Perumytilus purpuratus. Our results showed a direct relationship between predator and prey size. During attack, the small-sized snails (up to 18 mm shell length, SL) used exclusively the ABO, and medium-sized snails (18–20 mm SL) shifted to using the radula for rasping shells. Meanwhile, the largest-sized snails (> 20 mm SL) used the radula, but also occasionally the pedal muscle and labral tooth, to attack their prey. The site selectivity on the mytilid shell varied according to predatory mechanisms used. The small-sized gastropods used the ABO to drill the center of the prey valves, whereas mid-sized and large-sized snails used the radula and the labral tooth on the valve edges. Occasionally, large-sized snails also used ABO. Shifts in predatory strategies and attacked areas are influenced by the development and consolidation of structures involved in the attack as predator size increased. The incorporation of trace elements during rachidian teeth growth may enable major resistance to friction against carbonate prey valves, as well as the appearance and development of the labral tooth, play relevant roles in the predatory mechanism shifts, which allows the consumption of larger prey. These patterns described evidences the gastropod's predatory behaviour in terms of energetic gain while minimizing the risk of the predator itself being preyed on.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42681647","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}

{"title":"A Limpet (Lottiidae), Introduced to Sicily, is Traced to Its Homeland in Sri Lanka and Described as a New Species","authors":"D. Scuderi, T. Nakano, D. Eernisse","doi":"10.4002/040.064.0104","DOIUrl":"https://doi.org/10.4002/040.064.0104","url":null,"abstract":"ABSTRACT Continuing molecular and morphological investigations of a limpet recently reported as introduced to Sicily in the Mediterranean Sea have revealed it to be an undescribed species of Lottia Gray, 1833, a genus that is native to Sri Lanka and vicinity in the northern Indian Ocean. The genetic and morphological features of the limpets compared from Sicily and Sri Lanka correspond so closely that we do not hesitate to describe it collectively as Lottia iani n. sp., with type locality of Tangalle on the coast of Sri Lanka. Much is still unknown about its native range, when and how it arrived in Sicily, whether it is capable of impacting native species, and whether its introduction might be more widespread in the Mediterranean than just the particular eastern Sicilian localities where it has been observed. It is plausible that the introduction of L. iani to Sicily could have resulted from recent expansions to the Suez Canal, which is known to have led to other species introductions in recent years. Other possibilities include an introduction related to shipping or mariculture activities. However it managed to arrive, this limpet species has clearly been able to establish a self-recruiting local population at particular Sicilian localities with rocky volcanic shores.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42705413","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}

{"title":"Phenotypic Features of Dimya cf. Japonica (Bivalvia, Dimyidae) from Niue Island (South Pacific) with Accounts on Its Phylogeny and Taxonomic Relationships","authors":"Luiz Ricardo L. Simone, V. S. do Amaral","doi":"10.4002/040.064.0107","DOIUrl":"https://doi.org/10.4002/040.064.0107","url":null,"abstract":"ABSTRACT Phenotypic characters of the uncommon Dimya cf. japonica, based on a specimen from Niue Is. in the South Pacific, are reported to represent the enigmatic Dimyidae in a wide-ranging Bivalvia phylogenetic scenario. The main conclusion is that dimyids are placed between ostreoideans and pectinoideans. This is supported by five synapomorphies. Dimyids are closer to pectinoideans, in that they share four synapomorphies.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47730175","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}

{"title":"Intraspecific Variation in the Common Pea Clam, Pisidium casertanum (Poli, 1791) (Bivalvia: Sphaeriidae): A Geometric Morphometric Analysis","authors":"Hanane Rassam, C. Albrecht, R. Sousa, M. Lopes‐Lima, H. Benaissa, M. Ghamizi","doi":"10.4002/040.063.0203","DOIUrl":"https://doi.org/10.4002/040.063.0203","url":null,"abstract":"ABSTRACT The morphological plasticity of bivalve species may impair their correct identification. Pisidium species (Sphaeriidae) are difficult to distinguish, notably the common pea clam, Pisidium casertanum (Poli, 1791), which is a polymorphic species, often misidentified and confused with other Pisidium species. This is especially true since this species is the most euryecious of the genus, being able to colonize very different habitats. In this study, elliptic Fourier Analysis, a geometric morphometric method, was used to assess intraspecific variation in P. casertanum. Sampling of specimens was done in three habitat types – springs, lakes and streams – in the Mediterranean biodiversity hotspot region, using the Sebou basin in Morocco as a study area. In addition to the geometric morphometric method, linear measurements of the shell were used to assess growth patterns. Results revealed differences in the hinge plate, which is broader in shells collected from lakes, whereas it is higher in shells of springs. The geometric morphometric method clearly showed shape differences between individuals of the three habitats. Specimens of lakes were the most distinguishable, presenting more elongated shells than those from springs and streams, which are shorter but higher. Individuals from the three habitat types presented a negative allometric growth pattern whereby the shell of animals grows more slowly in height than in length. The use of linear and geometric morphometric methods led to conclude that the morphology of P. casertanum is, in fact, highly influenced by its environment, in particular, its habitat type.","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41371328","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}

{"title":"Back Matter","authors":"","doi":"10.4002/040.063.0210","DOIUrl":"https://doi.org/10.4002/040.063.0210","url":null,"abstract":"","PeriodicalId":49895,"journal":{"name":"Malacologia","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46157480","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}