ArticleDie Naturwissenschaften2016
The pattern of a specimen of Pycnogonum litorale (Arthropoda, Pycnogonida) with a supernumerary leg can be explained with the "boundary model" of appendage formation.
Article in Die Naturwissenschaften, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed, 35 citations in OpenAlex.
- The genome of a sea spider corroborates a shared Hox cluster motif in arthropods with a reduced posterior tagma.BMC biology · 2025Article
- Epimorphic development in tropical shallow-water Nymphonidae (Arthropoda: Pycnogonida) revealed by fluorescence imaging.Zoological letters · 2024Article
- Homeotic transformation in a terrestrial isopod: insights into the appendage identity in crustaceans.Die Naturwissenschaften · 2023Article
- The sea spiderProceedings of the National Academy of Sciences of the United States of America · 2023Article
- Article
- A microCT-based atlas of the central nervous system and midgut in sea spiders (Pycnogonida) sheds first light on evolutionary trends at the family level.Frontiers in zoology · 2022Article
- Phylogenomic Resolution of Sea Spider Diversification through Integration of Multiple Data Classes.Molecular biology and evolution · 2021Article
- Teratological changes in postembryos ofPeerJ · 2021Article
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Authors and funding
2 authors at 1 institution in 2 countries.
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No grant is acknowledged in the PubMed record.
Abstract
A malformed adult female specimen of Pycnogonum litorale (Pycnogonida) with a supernumerary leg in the right body half is described concerning external and internal structures. The specimen was maintained in our laboratory culture after an injury in the right trunk region during a late postembryonic stage. The supernumerary leg is located between the second and third walking legs. The lateral processes connecting to these walking legs are fused to one large structure. Likewise, the coxae 1 of the second and third walking legs and of the supernumerary leg are fused to different degrees. The supernumerary leg is a complete walking leg with mirror image symmetry as evidenced by the position of joints and muscles. It is slightly smaller than the normal legs, but internally, it contains a branch of the ovary and a gut diverticulum as the other legs. The causes for this malformation pattern found in the Pycnogonum individual are reconstructed in the light of extirpation experiments in insects, which led to supernumerary mirror image legs, and the "boundary model" for appendage differentiation.
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