A New Species of Sexually Dimorphic Brittle Star of the Genus Ophiodaphne (Echinodermata: Ophiuroidea)
| Autor: | Hideyuki Tominaga, Miéko Komatsu, Hikaru Igarashi, Masato Kiyomoto, Mamiko Hirose |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Male Zoology 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Monophyly Japan Species Specificity Genus Brittle star biology.animal Botany Animals Sea urchin Phylogeny Phylogenetic tree biology Cytochrome c oxidase subunit I biology.organism_classification Sexual dimorphism 030104 developmental biology Key (lock) Animal Science and Zoology Female Animal Distribution Echinodermata |
| Zdroj: | Zoological science. 34(4) |
| ISSN: | 0289-0003 |
| Popis: | We describe a new species of sexually dimorphic brittle star, Ophiodaphne spinosa, from Japan associated with the irregular sea urchin, Clypeaster japonicus based on its external morphology, and phylogenetic analyses of mitochondrial COI (cytochrome c oxidase subunit I). Females of this new species of Ophiodaphne are characterized mainly by the presence of wavy grooves on the surface of the radial shields, needle-like thorns on the oral skeletal jaw structures, and a low length-to-width ratio of the jaw angle in comparison with those of type specimens of its Ophiodaphne congeners: O. scripta, O. materna, and O. formata. A tabular key to the species characteristics of Ophiodaphne is provided. Phylogenetic analyses indicate that the new species of Ophiodaphne, O. scripta, and O. formata are monophyletic. Our results indicate that the Japanese Ophiodaphne include both the new species and O. scripta, and that there are four Ophiodaphne species of sexually dimorphic brittle stars with androphorous habit. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|