| Title: |
Chimaera stellata, a new species described from the northwestern Pacific Ocean, with the redescription of Chimaera owstoni Tanaka 1905 (Chondrichthyes: Chimaeridae): Chimaera stellata and C. owstoni, description and redescription: A. Teramura et al. |
| Authors: |
Teramura, Akinori1,2,3 (AUTHOR) akifishes@yahoo.co.jp, Senou, Hiroshi4 (AUTHOR), Hirase, Shotaro1 (AUTHOR) |
| Source: |
Ichthyological Research. Jan2025, Vol. 72 Issue 1, p117-129. 13p. |
| Subject Terms: |
*PECTORAL fins, *FINS (Anatomy), *MITOCHONDRIAL DNA, *GENETIC barcoding, *CHONDRICHTHYES |
| Abstract: |
A new species, Chimaera stellata, is described on the basis of a specimen collected from the Okinawa Trough. The new species is most similar to Chimaera owstoni Tanaka 1905, which is redescribed, but can be distinguished from the latter by the following combination of characters: body stocky (vs. body slender); height of head posterior to eye 24.9% of body length (BDL) (vs. 19.5–22.5% BDL); dorsal spine weakly curved (vs. strongly curved); second dorsal-fin base 72.4% BDL (vs. 73.6% BDL or more); pectoral fin teardrop shaped, not elongate, anterior margin 35.3% BDL (vs. 37.1% BDL or more), not reaching pelvic-fin origin when laid backward (vs. pectoral fin sickle-shaped, extending beyond pelvic-fin insertion); anal fin somewhat square, distal margin pale gray (vs. anal fin with rounded distal margin, uniformly blackish); dorsal and ventral caudal fins maximum height 3.8% and 4.8% BDL, respectively (vs. 3.1% BDL or less and 4.0% BDL or less, respectively); body color walnut brown with lighter dot-like spots, ventral surface darkish (vs. body color dark brown with lighter dot-like and elongate spots, ventral surface white). Sequence variations on the cytochrome c oxidase subunit I region of the mitochondrial DNA confirmed the distinction of each species. [ABSTRACT FROM AUTHOR] |
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| Database: |
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