Morphological description and mitochondrial DNA-based phylogenetic placement of a new species of Callistoctopus Taki, 1964 (Cephalopoda, Octopodidae) from the southeast waters of China

By

Zheng, Xiaodong
Xu, Chenxi
Li, Jiahua

Type

Article

Date of Publication

2022

Original Publication

ZooKeys

Volume

1121

Pages

1--15

Subjects

Callistoctopus xiaohongxu sp. nov , COI gene , new species , octopus , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1121.86264

 

Abstract

In this study, we described a new species of octopus and named itCallistoctopus xiaohongxusp. nov.based on nine specimens captured in the waters of southeast China.Callistoctopus xiaohongxusp. nov.is a small to moderate-sized octopus. The most characteristic and defining morphological features are the reddish-orange to reddish-brown skin, gills with 8 or 9 lamellae per demibranch, \∧/-shaped funnel organ, and small suckers. Fragments obtained from the mitochondrial cytochrome c oxidase subunit I (COI) gene of nine specimens were 593 bp in length, and the genetic distance among the specimens ofC. xiaohongxusp. nov.and the other 16 octopods ranged from 11.13 to 21.09%. Topologies resulting from ML and BI analyses of the COI gene showed a highly supported monophyletic clade (bootstrap value [BS] = 94%, posterior probability [PP] = 100%) containing all the specimens identified asC. xiaohongxusp. nov.