Cheilodactylus

from Wikipedia, the free encyclopedia
Cheilodactylus
Cheilodactylus fasciatus, the type species of the genus, on a sponge. Image taken from False Bay on the Cape of Good Hope.

Cheilodactylus fasciatus , the type species of the genus, on a sponge. Image taken from False Bay on the Cape of Good Hope.

Systematics
Spinefish (Acanthopterygii)
Perch relatives (Percomorphaceae)
Order : Sunfish-like (Centrarchiformes)
Subordination : Munchbacks (Cirrhitioidei)
Family : Cheilodactylidae
Genre : Cheilodactylus
Scientific name of the  family
Cheilodactylidae
Bonaparte , 1850
Scientific name of the  genus
Cheilodactylus
Lacépède , 1803

Cheilodactylus is a genus of bottom-dwelling marine fish from the group of tufted perch-like (Cirrhitioidei)living between rocks. There are two species, both of which are found on the coast of southern Africa.

features

Cheilodactylus species have an elongated, laterally flattened body that is higher in front and sloping evenly towards the tail. The mouth is small, provided with thick lips and terminal . Like their relatives, the tufted perch , they can lean on the ground with their pectoral fins, the lower rays of which are very long, thickened and free-standing. Palatine teeth and a swim bladder are missing. The fish have a single long dorsal fin supported by 17 to 20 fin spines and 19 to 25 soft rays. The anal fin has three spines and 9 to 11 soft rays. The two Cheilodactylus species differ from the related species of the Latridae by the frayed, cirrus-like fin membranes between the spines of the dorsal fin. Cheilodactylus species can reach lengths of 20 ( Cheilodactylus pixi ) to 30 cm ( Cheilodactylus fasciatus ).

species

Systematics

The genus Cheilodactylus was introduced in 1803 by the French ichthyologist Bernard Germain Lacépède with Cheilodactylus fasciatus as the type species. In 1850, the Italian zoologist Charles Lucien Jules Laurent Bonaparte established the Cheilodactylidae family. A total of 16 species were counted to the genus Cheilodactylus until January 2014 and the family Cheilodactylidae comprised four genera up to this time, in addition to Cheilodactylus also Chirodactylus , Dactylophora and Nemadactylus . The Cheilodactylidae in this composition can not be distinguished morphologically from the related family Latridae and comparisons of the mitochondrial DNA and the cytochrome b - DNA showed that the two South African species Cheilodactylus fasciatus and C. pixi differ from the other species of their genus and family, while the others are more closely related to the species of Latridae than to the two South African species. In order to get back to monophyletic groups in January 2018, a team of Japanese scientists restricted the genus Cheilodactylus and the family Cheilodactylidae to the two South African species, while the other genera of the Cheilodactylidae were assigned to the Latridae and the non-South African species of Cheilodactylus to the revalidated genus Goniistius , which was also assigned to the Latridae.

supporting documents

  1. ↑ a b c Cheilodactylus pixi on Fishbase.org (English)
  2. ↑ a b c Cheilodactylus fasciatus on Fishbase.org (English)
  3. ↑ a b Kimura, K., Imamura, H. & Kawai, T. (2018): Comparative morphology and phylogenetic systematics of the families Cheilodactylidae and Latridae (Perciformes: Cirrhitoidea), and proposal of a new classification. Zootaxa, 4536 (1): 1-72. DOI: 10.11646 / zootaxa.4536.1.1
  4. ^ Joseph S. Nelson, Terry C. Grande, Mark VH Wilson: Fishes of the World. Wiley, Hoboken, New Jersey, 2016, ISBN 978-1118342336
  5. ↑ Christopher P. Burridge & Adam J. Smolenski: Molecular phylogeny of the Cheilodactylidae and Latridae (Perciformes: Cirrhitoidea) with notes on taxonomy and biogeography. Molecular Phylogenetics and Evolution 30 (2004), pp 118-127