Cyphomyrus wilverthi (Boulenger, 1898)
Original Published Description:
From Boulenger (1909, pp. 86-87)
Depth of body 2½ to 3 times in total length, length of head 4 3/4 to 5 times; back gibbose, with convex outline in front of dorsal and concave outline on nape. Head as long as deep, with convex upper and concave lower profile; snout short, 1/4 to 1/3 length of head; mouth terminal or subinferior, its width 1/4 to 1/3 length of head, below level of eye; chin with a strong globular swelling ; teeth extremely minute, almost hidden in the thick gums, truncate or slightly notched, 3 in upper jaw, 6 in lower; nostrils in posterior half of the snout, posterior a little lower down than anterior, which is on a level with centre of eye; eye moderate, 2/3 to 3/4 length of snout or interorbital width. Dorsal 38-40, 1 2/3 to 1¾ times length of anal, its length equaling its distance from head. Anal 25-27, originating below 12th or 13th ray of dorsal, a little nearer base of ventral than base of caudal. Pectoral pointed, a little shorter than head, 1½ to 1 2/3 times length of ventral, extending a little beyond base of latter. Caudal scaled in its basal two-thirds, with pointed lobes. Caudal peduncle 3 times as long as deep, 4/5 length of head. 61-68 scales in lateral line, 20-21 / 20-21 in transverse series on body, 12-14 / 13-14 in transverse series between dorsal and anal, 12 round caudal peduncle. Yellowish.
Can be distinguished from Cyphomyrus psittacus and C. macrops by the wider mouth with medial notch in the upper lip.
Ecology and Distribution
widespread in major waterways of Congo Basin. See Fishbase for museum records and localities.
From Catalog of Fishes, edition of 6 May 2010: wilverthi, Marcusenius Boulenger [G. A.] 1898:8, Pl. 4 (fig. 1) [Annales du Musee du Congo (Ser. Zoology) v. 1 (fasc. 1); ref. 542] Matadi and Upoto, Zaire [Democratic Republic of Congo]. Syntypes: BMNH 18126.96.36.199 (1) Matadi, 18188.8.131.52 (1) Upoto; MRAC 47 (1), 49 (1), 133 (1). •Valid as Hippopotamyrus wilverthi (Boulenger 1898) -- (Gosse 1984:77 [ref. 6169]). •Valid as Cyphomyrus wilverthi (Boulenger 1898) -- (Myers 1960:125 [ref. 3128], Lavoué et al. 2003:288 [ref. 29517]). Current status: Valid as Cyphomyrus wilverthi (Boulenger 1898) Mormyridae.
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