Fenerbahce devosi

description

Description. See Figures 2 – 4 for general appearance and colour pattern and Table 3 for morphometric data of the type series. Small nothobranchiid species, largest observed specimen in the type series 31.1 mm TL. Strong sexual dimorphism, adult males are larger and more colourful than females and have larger unpaired fins with extended rays, especially in the caudal fin. Dorsal profile straight or slightly convex, greatest body depth at base of pelvic fin, ventral profile slightly convex. Snout rounded, mouth directed upwards, lower jaw longer than upper jaw, posterior end of rictus at level of dorsal third of eye. Frontal neuromasts in two separate grooves, pre-, post-, and supraorbital neuromast system and upper two pit organs of the preopercular neuromast system lack tubular structures. Two supraorbital grooves with three neuromasts each. Anterior most neuromasts of supraorbital system in line with frontal neuromasts. All neuromasts are situated in more or less shallow grooves or simply on top of the skin. Teeth on jaws unicuspid, outer row large and curved, inner teeth smaller and more irregularly placed. Considerable variation in width of vomer and parasphenoid. For two speci

Description of Fenerbahce devosi (Cyprinodontiformes: Nothobranchiidae), a new species of dwarf killifish from the eastern Congo Basin in the Democratic Republic of Congo

diagnosis

Diagnosis. Fenerbahce devosi (Figs. 2 – 4, Table 3) shares the following combination of characters with F. fo rmosus (Fig. 5, Table 3): small species with maximum TL below 4 cm, reflective scales dorsally on the head, complete absence of tubular structures in the pre-, post-, supraorbital, and opercular neuromast system, and small dorsal fin. Huber (1979) and a specimen from a collection near Oyo, which have a more northern distribution, whereas F. f o r m o s u s S indi- cates samples from the southwestern distribution area, closer to Kinshasa, from Pool Malebo and the Njiri River (see Fig. 1). Abbreviations: TL = total length, SL = standard length, HL = head length, BD = body depth, E = eye diameter, S = snout length, pD = predorsal length, pA = preanal length, CL = caudal peduncle length, CD = caudal peduncle depth, CPR = caudal peduncle length / depth ratio, D = number of dorsal fin rays, A = number of anal fin rays, D / A = position of first dorsal fin ray relative to the opposite anal fin ray. SL in mm, TL, HL, BD, pD, pA, CL, and CD as percentages of SL; E, and S are given as percentages of head length. Numbers in brackets are mean values. Western clade (19 specimens) Easter

Description of Fenerbahce devosi (Cyprinodontiformes: Nothobranchiidae), a new species of dwarf killifish from the eastern Congo Basin in the Democratic Republic of Congo

distribution

Distribution. The genus Fenerbahce is distributed from Voula at the lower Congo and Pool Malebo in the west to the Portes de l’Enfer in the southeast of the Congo River basin (Fig. 1). Cyprinidontiform fishes collected in 1925 at Capelongo, Cunene River, in Angola (AMNH 8994), and later identified as Adamas formosus turned out to be a poeciliid species after examination of a picture of these specimens kindly sent by M. Stiassny to the authors. Fenerbahce devosi is, according to our current knowledge, restricted to the eastern part of the Congo Basin with all known populations near Ubundu. Other populations (e. g., Yangambi, Yaekama, Epulu, and Nikambwe) differ in certain characters and are therefore not included in this species. During a recent survey of the Congo ichthyofauna, a new collection of Fenerbahce was made by MRAC scientists (E. Vreven, pers. comm.) at the mouth of the Aruwimi River, east of Basoko (Fig. 1), which at the moment only could be studied by photographs (Fig. 6). These specimens differ by certain male colour pattern characters considerably from F. devosi, so we hesitate to include it within this species without further research. However, the available pictures

Description of Fenerbahce devosi (Cyprinodontiformes: Nothobranchiidae), a new species of dwarf killifish from the eastern Congo Basin in the Democratic Republic of Congo

etymology

Etymology. Fenerbahce devosi is named after Luc De Vos, head of the Ichthyology department of the National Museums of Kenya, who died far too young in 2003. Luc made several important fish collections in the Congo Basin, including populations of F. devosi.

Description of Fenerbahce devosi (Cyprinodontiformes: Nothobranchiidae), a new species of dwarf killifish from the eastern Congo Basin in the Democratic Republic of Congo