Walking leg regeneration in the sea spider Nymphon brevirostre Hodge, 1863 (Pycnogonida)

IF 1.7 3区 农林科学 Q2 ENTOMOLOGY Arthropod Structure & Development Pub Date : 2023-10-20 DOI:10.1016/j.asd.2023.101310
Maria Petrova, Ekaterina Bogomolova
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Abstract

Regeneration is widespread across all animal taxa, but patterns of its distribution and key factors determining regeneration capabilities stay enigmatic. A comparative approach could shed light on the problem, but its efficacy is limited by the fact that data is only available on a few species from derived taxa. Pycnogonida are nested basally within the Chelicerata. They can shed and replace their walking legs and have a high regeneration capacity. In this work, we carried careful observation on leg appendotomy and regeneration processes in a sea spider under laboratory settings. The limb structure and in vivo observation reveal autotomy as the most likely appendotomy mechanism. High regeneration capabilities were ascertained: an anatomically normal but small leg appeared in a single molting cycle and the full functionality regained in 2–3 cycles. Wound closure after appendotomy in N. brevirostre primarily relies on hemolymph coagulation, which apparently differs from both xiphosurans and crustaceans. Regeneration is provided by proliferation in the leg cutpiece. Regenerative morphogenesis resembles the normal ontogenetic morphogenesis of a walking leg, but accelerated. Unlike in most arthropods, in N. brevirostre, regeneration does not necessarily correspond to the molting cycle, inferring a plesiomorphic state.

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短吻睡莲海蛛的步行腿再生,Hodge,1863(Pycnogonida)。
再生在所有动物类群中都很普遍,但其分布模式和决定再生能力的关键因素仍然是个谜。比较方法可以阐明这个问题,但其有效性受到以下事实的限制:只能获得衍生分类群中少数物种的数据。Pycnongida嵌套在Chelicerata的基部。它们可以脱落并替换行走的腿,具有很高的再生能力。在这项工作中,我们在实验室环境下仔细观察了海蜘蛛的腿阑尾切除术和再生过程。肢体结构和体内观察表明,自残是最有可能的阑尾切除机制。高再生能力被确定:在一个蜕皮周期中出现了一条解剖学正常但很小的腿,在2-3个周期中恢复了全部功能。短吻猪笼草阑尾切除术后的伤口闭合主要依靠血淋巴凝固,这显然不同于虾和甲壳类动物。再生是由腿部切片中的增殖提供的。再生形态发生类似于行走腿的正常个体发生形态发生,但加速了。与大多数节肢动物不同的是,在短吻猪笼草中,再生不一定与蜕皮周期相对应,从而推断出一种类同状态。
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来源期刊
CiteScore
3.50
自引率
10.00%
发文量
54
审稿时长
60 days
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.
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Cuticle ultrastructure of the Early Devonian trigonotarbid arachnid Palaeocharinus Evolution of and structures involved in wing folding in featherwing beetles (Coleoptera: Ptiliidae) Morphology of lecithotrophic postlarvae of genus Austropallene (Arthropoda: Chelicerata) with some notes on reproductive strategy The eyestalk photophore of Northern krill Meganyctiphanes norvegica (M. Sars) (Euphausiacea) re-investigated: Innervation by specialized ommatidia of the compound eye Outside Front Cover
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