A new species of damselfish (Pomacentridae) from the Indian Ocean
MetadataShow full item record
The pomacentrid fish Chromis dimidiata (Klunzinger, 1871), type locality Red Sea, formerly believed to be wide-ranging into the Indian Ocean, is restricted to the Red Sea. The Indian Ocean population is described as a new species, Chromis fieldi. It differs in having modally 17 pectoral rays and 17 lateral-line scales, compared to modally 16 pectoral rays and 15 lateral-line scales for C. dimidiata, and the demarcation of the dark brown anterior part of the body from the white posterior part is convex, compared to nearly straight in C. dimidiata, and not as sharply defined dorsally and ventrally. Phylogenetic comparisons based on mitochondrial DNA (mtDNA) cytochrome b sequences support morphological differentiation with evolutionary separation of C. dimidiata sampled in the central Red Sea and C. fieldi sampled in the Indian Ocean (d = 0.019). These two species differ from the related C. iomelas Jordan & Seale, 1906 of the western and central Pacific in having modally 12 dorsal and anal fin soft rays (vs. 13 for C. iomelas), the demarcation of dark brown and white distinctly anterior to the origin of the anal fin, and d = 0.085 to d = 0.087 for cytochrome b.
Showing items related by title, author, creator and subject.
Phylogeography, population structure and evolution of coral-eating butterflyfishes (Family Chaetodontidae, genus Chaetodon, subgenus Corallochaetodon)Waldrop, E.; Hobbs, J.; Randall, J.; Di Battista, Joseph; Rocha, L.; Kosaki, R.; Berumen, M.; Bowen, B. (2016)Aim: This study compares the phylogeography, population structure and evolution of four butterflyfish species in the Chaetodon subgenus Corallochaetodon, with two widespread species (Indian Ocean – C. trifasciatus and ...
Regal phylogeography: Range-wide survey of the marine angelfish Pygoplites diacanthus reveals evolutionary partitions between the Red Sea, Indian Ocean, and Pacific OceanColeman, R.; Eble, J.; Di Battista, Joseph; Rocha, L.; Randall, J.; Berumen, M.; Bowen, B. (2016)The regal angelfish (Pygoplites diacanthus; family Pomacanthidae) occurs on reefs from the Red Sea to the central Pacific, with an Indian Ocean/Rea Sea color morph distinct from a Pacific Ocean morph. To assess population ...
Phylogeography of Indo-Pacific reef fishes: Sister wrasses Coris gaimard and C. cuvieri in the Red Sea, Indian Ocean and Pacific OceanAhti, P.; Coleman, R.; Di Battista, Joseph; Berumen, M.; Rocha, L.; Bowen, B. (2016)Aim: The aim of this study was to resolve the evolutionary history, biogeographical barriers and population histories for sister species of wrasses, the African Coris (Coris cuvieri) in the Indian Ocean and Red Sea, and ...