{"title":"Morphology of lecithotrophic postlarvae of genus Austropallene (Arthropoda: Chelicerata) with some notes on reproductive strategy","authors":"","doi":"10.1016/j.asd.2024.101395","DOIUrl":null,"url":null,"abstract":"<div><div>The family Callipallenidae Hilton, 1942 belongs to the superfamily Nymphonoidea Pocock, 1904 together with other family, Nymphonidae. The lecithotrophic postlarvae hatch from the eggs of the callipallenid sea spiders, but the data on this life stage are very scarce and fragmentary. This gives a very limited understanding of larval anatomy, morphology, and diversity. The larvae of <em>Austropallene bucera</em> Pushkin, 1993, <em>Austropallene calmani</em> Gordon, 1944, and <em>Austropallene cristata</em> Bouvier, 1911 have been studied and described for the first time by the methods of light (LM) and scanning electron microscopy (SEM). The main morphometry parameters have been determined in larvae and adult egg-bearing males. The general plan of the postlarvae is presented together with its specific features. The postlarvae of the studied <em>Austropallene</em> species combine the features of lecithotrophic and free-living pycnogonid larvae. The diversity of larvae in the Nymphonoidea superfamily has been analysed considering original and published data, and a morphological series has been developed. The complex of lecithotrophic larvae, like postlarvae of Callipallenidae, should be considered as primary for the entire superfamily. It is also suggested that sea spiders with lecithotrophic larvae tend to follow the K-strategy, but they care for their offspring to varying degrees.</div></div>","PeriodicalId":55461,"journal":{"name":"Arthropod Structure & Development","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Arthropod Structure & Development","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1467803924000653","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENTOMOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The family Callipallenidae Hilton, 1942 belongs to the superfamily Nymphonoidea Pocock, 1904 together with other family, Nymphonidae. The lecithotrophic postlarvae hatch from the eggs of the callipallenid sea spiders, but the data on this life stage are very scarce and fragmentary. This gives a very limited understanding of larval anatomy, morphology, and diversity. The larvae of Austropallene bucera Pushkin, 1993, Austropallene calmani Gordon, 1944, and Austropallene cristata Bouvier, 1911 have been studied and described for the first time by the methods of light (LM) and scanning electron microscopy (SEM). The main morphometry parameters have been determined in larvae and adult egg-bearing males. The general plan of the postlarvae is presented together with its specific features. The postlarvae of the studied Austropallene species combine the features of lecithotrophic and free-living pycnogonid larvae. The diversity of larvae in the Nymphonoidea superfamily has been analysed considering original and published data, and a morphological series has been developed. The complex of lecithotrophic larvae, like postlarvae of Callipallenidae, should be considered as primary for the entire superfamily. It is also suggested that sea spiders with lecithotrophic larvae tend to follow the K-strategy, but they care for their offspring to varying degrees.
期刊介绍:
Arthropod Structure & Development is a Journal of Arthropod Structural Biology, Development, and Functional Morphology; it considers manuscripts that deal with micro- and neuroanatomy, development, biomechanics, organogenesis in particular under comparative and evolutionary aspects but not merely taxonomic papers. The aim of the journal is to publish papers in the areas of functional and comparative anatomy and development, with an emphasis on the role of cellular organization in organ function. The journal will also publish papers on organogenisis, embryonic and postembryonic development, and organ or tissue regeneration and repair. Manuscripts dealing with comparative and evolutionary aspects of microanatomy and development are encouraged.