Lee, Geon Hyeok; Min, Gi-Sik. (2022). Rhynchospio aciliata sp. nov., a new spionid species (Annelida, Spionidae) from the Korea Strait. ZooKeys. 1100: 191-205.

428547

10.3897/zookeys.1100.80077 [view]

Lee, Geon Hyeok; Min, Gi-Sik

2022

1100: 191-205

Publication

https://zookeys.pensoft.net/article/80077/list/9/

World Polychaeta Database (WPolyD).

A new spionid polychaete, Rhynchospio aciliata sp. nov., was discovered in the fine sandy sediments of an intertidal habitat from Korean waters. The new species is considered a simultaneous hermaphrodite, but no brooding embryos were found in any of the specimens collected in this study. This species is unique in the absence of ciliation in the anteriormost chaetigers. Rhynchospio aciliata sp. nov. is morphologically most similar to Rhynchospio foliosa Imajima, 1991 from Japan in having an elevation on the prostomium, conspicuously large and foliaceous branchiae, and intersegmental lateral pouches. However, the new species differs from the latter by the following characteristics: (1) large and lanceolate notopodial postchaetal lamellae of chaetiger 1, (2) transverse ciliated bands and ciliation on the inner branchiae absent in anteriormost chaetigers, and (3) pygidium with one pair of ventral cirri and numerous elongated dorsolateral cirri. Detailed description and illustrations of the new species are provided with molecular information on mitochondrial cytochrome c oxidase subunit I (COI), 16S ribosomal DNA (rDNA), nuclear 18S rDNA, and 28S rDNA.

Sea of Japan

Molecular systematics, Molecular biology
Systematics, Taxonomy

Annelida
Polychaeta

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