Leiosolenus (Labis) patagonicus (Bivalvia: Mytilidae) from Argentinean sea, taxonomic revision and anatomical notes

Q3 Agricultural and Biological Sciences

Papeis Avulsos de Zoologia Pub Date : 2022-11-01 DOI:10.11606/1807-0205/2022.62.068

M. Delfino, J. Signorelli

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Abstract

The taxonomic status and anatomy of Leiosolenus (Labis) patagonicus (d'Orbigny, 1846 in 1834-1847) has been revised. This boring bivalve, belonging to the family Mytilidae, is the only Lithophaginae species distributed along the Argentinean coast. None of the fossil species mentioned for this area must be considered as a synonym of d'Orbigny´s species. Leiosolenus patagonicus is characterized by a thin shell, longitudinally elongated, with subterminal umbos and commarginal striae. The calcareous depositions on the outer surface of the shell are extended beyond the posterior margin. This species has well developed purple siphons, well differentiated morphologically from each other. Incurrent siphon is wider than excurrent, opened at the ventral edge and provided with a basal siphon valve at the base. Two pairs of demibranchs type B (1) from Atkins were observed. The shell characters and internal morphology were compared with other related species of the genus living along the South American coast. Finally, repository, type locality and habitat conditions were informed.

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阿根廷海域的巴塔哥尼亚蛙（双壳目：Mytilidae），分类学修订和解剖学注释

对Leiosolenus (Labis) patagonicus (d'Orbigny, 1846 in 1834-1847)的分类地位和解剖学进行了修订。这种无聊的双壳类，属于蛹科，是唯一分布在阿根廷海岸的食石类。这个地区提到的任何化石物种都不能被认为是d'Orbigny物种的同义词。巴塔哥龙的特点是壳薄，纵向拉长，具近顶生伞形和近缘纹。甲壳外表面的钙质沉积物延伸到后缘以外。本种具有发育良好的紫色虹吸管，在形态上彼此分化良好。流入虹吸管比流出虹吸管宽，在腹边打开，并在底部设有基虹吸管阀。观察到两对来自Atkins的B型半分枝(1)。将其外壳特征和内部形态与生活在南美海岸的其他近缘种进行了比较。最后，通报了储存库、类型、地点和生境条件。

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来源期刊

Papeis Avulsos de Zoologia Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

1.50

自引率

0.00%

发文量

审稿时长

8 weeks

期刊介绍： Papéis Avulsos de Zoologia to publish original contributions in systematics, paleontology, evolutionary biology, ecology, taxonomy, anatomy, behavior, functional morphology, molecular biology, ontogeny, faunistic studies, and biogeography. Its abbreviated title is Pap. Avulsos de Zool. (São Paulo), which should be used in bibliographies, footnotes and bibliographical references and strips.