Sedercypris, Skelton & Swartz & Vreven, 2018

Skelton, Paul H., Swartz, Ernst R. & Vreven, Emmanuel J., 2018, The identity of Barbus capensis Smith, 1841 and the generic status of southern African tetraploid cyprinids (Teleostei, Cyprinidae), European Journal of Taxonomy 410, pp. 1-29 : 19-20

Sedercypris gen. nov.

urn:lsid:zoobank.org:act:09567CC9-7FF0-4054-BD36-CCCB26AB7F7D

Barbus Daudin, 1805: 58 ( Barbus calidus Barnard, 1938 ; Barbus erubescens Skelton, 1974 ).

‘ Pseudobarbus ’ – Yang et al. 2015: 99.

Type species

Sedercypris calidus ( Barnard, 1938) gen. et comb. nov. ( Fig. 10D ).

Included species

Sedercyprus calidus ( Barnard, 1938) ( Fig. 10D ), distributed in the Clanwilliam Olifants River system, and Sedercypris erubescens (Skelton, 1974) , endemic to the Twee River, a tributary of the Doring branch of the Clanwilliam Olifants River system.

Diagnosis

Species of Sedercypris gen. nov. are distinct from all other southern African tetraploid genera in the combination of having six or seven branched rays in the anal fin (vs five – or six in Cheilobarbus capensis ), and a red base to the fins (only Pseudobarbus also has a red base to the fins). The genus is further distinguished from Cheilobarbus in overall body size (adults ± 150 mm SL vs> 150 mm SL); from Namaquacypris gen. nov. by fewer pre-dorsal vertebrae (11–14 vs 13–15) the position of the dorsal fin (in advance of the origin of the anal fin vs to over the origin of the anal fin), a difference in mouth position (terminal vs inferior), in not having a membrane between the inner pelvic rays and the body (vs presence of such a membrane Namaquacypris gen. nov.); from Amatolacypris gen. nov. in number and size of barbels ( Sedercypris gen. nov. with two pairs of well developed barbels that equal the orbit diameter vs one pair that is less than half an orbit diameter), in the number and size and shape of the infraorbitals (five, all slender in Sedercypris gen. nov. vs four, 3rd and 4th broad in Amatolacypris gen. nov.); and from Pseudobarbus in a serrated unbranched dorsal-fin ray ( Pseudobarbus has a simple unbranched dorsal-fin ray), the position of the mouth (terminal vs subterminal) and the absence of strong sexual dimorphism (vs sexual dimorphism with males having conical tubercles on the head, body and fins and larger fins compared to females).

Etymology

Endemic to and named for the Sederberg (Cedarberg), Western Cape, South Africa, a Cape Fold mountain range in which rise streams and rivers tributary to the Olifants River system. The Afrikaans spelling of Sederberg is adopted for the name to avoid the possible confusion with the genus Cheilobarbus when the genus name is abbreviated to an initial in text. Masculine.

Description

The genus Sedercypris gen. nov. includes medium sized (adults <120 mm SL) tetraploid cyprinine species from southern Africa with radiately striated scales; mouth terminal, lips slender, two pairs of well-developed simple oral barbels, pharyngeal bones with three rows of hooked teeth, formula 2,3,5 or 4-4 or 5,3,2; a simple s-folded intestine about equal to the SL in length; dorsal fin positioned over or behind the origin of the pelvic fins, with the last simple ray bony with posterior margin weakly or strongly serrated and 8 branched rays; anal fin with six or seven branched rays; mature adults with bright red flashes at the bases of fins. Breeding adults develop small erupted nuptial tubercles scattered over head dorsum and anterior body, single rows over anterior pectoral rays. Breeding takes place in male dominated nuptial schools over creviced rock faces.

Figures

Fig. 10. Species representative of southernAfrican tetraploid cyprinine genera. A. Pseudobarbus afer (Peters, 1864). B. Cheilobarbus capensis Smith, 1841. C. Amatolacypris trevelyani (Günther, 1877) gen.et comb.nov. D. Sedercypris calidus(Barnard, 1938) gen.et comb.nov. E. Namaquacyprishospes (Barnard, 1938) gen. et comb. nov. Photograph credits:A–D by P.H. Skelton (SAIAB); E by R.I. Bills (SAIAB).