Intraspecific Variation in the External and Skeletal Morphology of Hynobius setouchi Matsui, Okawa, Tanabe et Misawa, 2019 (Amphibia: Urodela: Hynobiidae)

Hara, Sotaro; Nishikawa, Kanto

doi:10.2108/zs190155

Cited by 2 publications

(3 citation statements)

References 26 publications

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“…This process was visible on the flexor side of the radius and attached with the flexor muscle (muscles humero‐antibranchialis). Interestingly, linear measurements revealed that the crista ventralis humeri in males were larger than those in females (Hara & Nishikawa, 2020). This flexor muscle arises from the crista ventralis humeri.…”

Section: Discussionmentioning

confidence: 99%

“…The specimens were collected at a breeding pond in the southern Kyoto City, Kinki District, central Japan, which was the same survey site as that used in the study by Hara and Nishikawa (2020). In total, 15 adult males were collected from the pond ().…”

Section: Methodsmentioning

confidence: 99%

“…The size and shape of these vertebrae (except the last caudo-sacral vertebra) were similar to those of the trunk vertebra. The following three types of haemal arch were observed on the last caudo-sacral vertebra: flat, bent, and straight types (see Hara & Nishikawa, 2020 for these types). The bent type was the major type in both male (approximately 47%) and female (approximately 67%) specimens.…”

Section: Caudo-sacral Vertebramentioning

confidence: 99%

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Osteological characteristics of the Setouchi salamander Hynobius setouchi (Urodela, Hynobiidae)

Hara

Nishikawa

2021

The Anatomical Record

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This study described the detailed osteological features of the Setouchi salamander Hynobius setouchi. H. setouchi, which is endemic to central Japan, was recently delineated from the wide range of H. nebulosus species based on molecular and external morphological characteristics. However, the osteological features of the species belonging to the genus Hynobius have not been examined, which has hindered the detailed understanding of morphological diversity in the genus. To address this problem, this study elucidated the osteological features of the salamander using micro-computed tomography scanning and whole-mount double staining methods. The articular, a part of the hypobranchial I, a part of coracoid, pubis, carpus, and tarsus were cartilaginous in small-sized individuals and were partially or completely ossified in large-sized individuals. The degree of ossification varied in the operculum, basibranchial II, and ascending process of the palatoquadrate. However, ossification was not associated with body size. The lacrimal, ossified manus, and ossified pes exhibited varying degrees of articulation or fusion irrespective of body size. Moreover, the cranium and tarsus of H. setouchi exhibited several unique characteristics. These osteological characteristics will aid in revising the taxonomy and phylogeny of the Hynobius species.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Caudo-sacral Vertebramentioning

confidence: 99%

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Osteological characteristics of the Setouchi salamander Hynobius setouchi (Urodela, Hynobiidae)

Hara

Nishikawa

2021

The Anatomical Record

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Taxonomic reassessment of salamanders (genus Hynobius) from Tsushima Islands, Japan, with a resurrection of Hynobius tagoi Dunn, 1923 (Amphibia: Caudata)

NIWA,

NISHIKAWA,

MATSUI

et al. 2023

Zootaxa

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To clarify the taxonomic status of salamanders from Tsushima Islands, Japan, we examined two species of salamanders, Hynobius tsuensis and Hynobius sp. from Tsushima Islands, and compared them with H. nebulosus from Kyushu. We found that the three taxa differ from each other in nuclear DNA, adult morphology, and egg-sac shape, and consider them to be independent species. Based on the investigation of type specimens of the synonyms, we identified Hynobius sp. as H. tagoi Dunn, 1923 and redescribe it herein. Also, we designate a neotype for H. tsuensis and redescribe H. tsuensis. The distribution areas of the two species partly overlap but they were distinguishable by their body colorations: H. tsuensis has uniformly blackish tail sides and a distinct yellow stripe on the upper tail edge; whereas H. tagoi has brown tail sides with numerous dark stippling and without a distinct yellow stripe on the upper tail edge.

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Intraspecific Variation in the External and Skeletal Morphology of Hynobius setouchi Matsui, Okawa, Tanabe et Misawa, 2019 (Amphibia: Urodela: Hynobiidae)

Cited by 2 publications

References 26 publications

Osteological characteristics of the Setouchi salamander Hynobius setouchi (Urodela, Hynobiidae)

Osteological characteristics of the Setouchi salamander Hynobius setouchi (Urodela, Hynobiidae)

Taxonomic reassessment of salamanders (genus Hynobius) from Tsushima Islands, Japan, with a resurrection of Hynobius tagoi Dunn, 1923 (Amphibia: Caudata)

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