Abstract

The tanaid Pagurapseudes dentatus was described from a male collected from the intertidal zone at False Bay, South Africa. The description was poorly illustrated, incomplete, did not describe the female or juvenile stages, and gave no information on its habitat. The species was rediscovered and found to be locally abundant at locations in South Africa, where it inhabits vacant gastropod shells. We redescribe P. dentatus by fully illustrating and describing its morphological characters, including the copulatory female and manca II stages. Pagurapseudes dentatus differs from similar species by a long seta on the basis of the characteristically elongated pereopod-1, as well as its singular distal pectinate setae on the propodus and adjacent to the dactylus of pereopod 6. Nano-CT scanning was used to illustrate and document the unusual mode of occupation of empty gastropod shells by the species. It was found (N = 139) occupying shells of 19 gastropod species from 10 different genera, occurring most abundantly in shells of Tricolia Risso, 1826, Burnupena Iredale, 1918, Assiminea Fleming, 1828, and Gibbula Risso, 1826. It forms dense populations under intertidal boulders, where it co-occurs with, and may compete for empty shells, with at least two common species of hermit crabs.

中文翻译：

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Pagurapseudes dentatus（布朗，1956年）（Peracarida：Tanaidacea）的生态学注释和注释，它是一种来自南非的居住在贝壳上的类禽类动物

摘要

从南非False Bay潮间带采集的雄性描述了七节类Pagurapseudes dentatus。描述不充分，不完整，没有描述雌性或幼年阶段，也没有提供有关其栖息地的信息。该物种被重新发现，并在南非居住着空腹腹足纲贝壳的地方局部丰富。我们重新描述P.鲆被充分说明和描述其形态特征，包括交配女性和曼卡II阶段。Pagurapseudes dentatus由于特征性的变长的pereopod-1以及其在奇足骨上的奇异的末端果胶齿状刚毛，并且与pereopod 6的趾甲相邻，因此它与相似的物种有长的不同。该物种对腹足动物空壳的不寻常的占领方式。发现（N = 139）占据了10个不同属的19种腹足动物的壳，其中最丰富的出现在Tricolia Risso（1826年），Burnupena Iredale（1918年），Assiminea Fleming（1828年）和Gibbula的壳中 Risso，1826年。它在潮间巨石下形成密集的种群，与至少两种常见的寄居蟹共生，并可能与空壳竞争。