Redescriptions of Dussumieria acuta Valenciennes 1847 and Dussumieria albulina (Fowler 1934), two valid species of rainb
- PDF / 2,203,364 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 89 Downloads / 120 Views
FULL PAPER
Redescriptions of Dussumieria acuta Valenciennes 1847 and Dussumieria albulina (Fowler 1934), two valid species of rainbow sardines (Clupeiformes: Dussumieriidae) Harutaka Hata1 · Sébastien Lavoué2 · Hiroyuki Motomura3 Received: 16 June 2020 / Revised: 8 August 2020 / Accepted: 21 August 2020 © The Ichthyological Society of Japan 2020
Abstract Dussumieria albulina (Fowler 1934), formerly regarded as a junior synonym of Dussumieria acuta Valenciennes 1847, is shown to be a valid species and is redescribed on the basis of 29 specimens, including the holotype. Although the two species resemble each other morphologically, sharing body scales with numerous longitudinal striae posteriorly, a deep body, 26 or fewer lower gill rakers on the first gill arch, and 15 or fewer branchiostegal rays, the former is distinguished by lacking parasphenoid teeth (vs. distinct conical teeth on parasphenoid in D. acuta), higher gill raker counts (total gill rakers on first gill arch 33–41 vs. 30–38), a rather slender body (20.6–24.4% SL vs. 23.4–28.2% SL in individuals of D. acuta > 75 mm SL), and melanophores scattered on the 3rd to 9th (vs. 1st to 5th) pectoral-fin rays from the uppermost ray. Analysis of the mitochondrial cytochrome oxidase I (COI) gene in both species showed them to be separated by 12% mean p-distance. A redescription of D. acuta is also provided. Keywords Morphology · Molecules · Taxonomy · Phylogenetics · Rainbow sardine
Introduction
This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as 230C4927-D894-47CE-A321-737CE 1DAE4D6. This article was published as an Online First article on the online publication date shown on this page. The article should be cited by using the doi number. * Harutaka Hata [email protected] Sébastien Lavoué [email protected] Hiroyuki Motomura [email protected]‑u.ac.jp 1
Center for Molecular Biodiversity Research, National Museum of Nature and Science, 4‑1‑1 Amakubo, Tsukuba, Ibaraki 305‑0005, Japan
2
School of Biological Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
3
The Kagoshima University Museum, 1‑21‑30 Korimoto, Kagoshima 890‑0065, Japan
The rainbow sardine genus Dussumieria Valenciennes 1847 (Clupeiformes: Dussumieriidae) is characterized by numerous branchiostegal rays (12–17), a rectangular premaxilla, the isthmus pointed anteriorly, a W-shaped pelvic scute, the pelvic fins located below the dorsal-fin base, the anal fin with 14–18 rays, and absence of keeled scutes on the abdomen (Whitehead 1985; Munroe et al. 1999). Together with Etrumeus Bleeker 1853, Jenkinsia Jordan and Evermann 1896, and Spratelloides Bleeker 1851, the genus has frequently been included in the subfamily Dussumieriinae (Clupeidae) (e.g., Whitehead 1985; Grande 1985; Grande and Nelson 1985; Munroe et al. 1999). Recent molecular studies, however, have shown that the aforementioned genera are neither closely related to Clupeidae nor form a monophyletic group, Dussumieria and Etrumeus being only distantly related to J
Data Loading...
