Chiloglanis

Friel, John P. & Vigliotta, Thomas R., 2011, Three new species of African suckermouth catfishes, genus Chiloglanis (Siluriformes: Mochokidae), from the lower Malagarasi and Luiche rivers of western Tanzania, Zootaxa 3063, pp. 1-21 : 17

Key to Chiloglanis species of the Luiche and Lower Malagarasi rivers of Tanzania

1. Oral disc length>16% SL; teeth arranged in tight clump along midline of lower jaw ( Fig. 1 A&B)...................... 2

- Oral disc length <16% SL; teeth broadly distributed along lower jaw ( Fig. 1 C); long adipose fin ( Fig. 5 )........................................................................................ Chiloglanis orthodontus (Malagarasi) .

2. Caudal fin truncate in juveniles and adult females, elongated middle rays in adult males ( Fig. 3 ); short dorsal (8.2–12.7% SL) and pectoral spines (9.9–15.1% SL)............................................. Chiloglanis igamba (Malagarasi) .

- Caudal fin forked...................................................................................... 3

3. Long dorsal (16.1–21.3% SL) and pectoral spines (19.1–23.6 % SL); dorsal and pectoral fins with distinctive dark patches ( Fig. 4 ).......................................................... Chiloglanis kazumbei (Luiche & Malagarasi) .

- Relatively short dorsal (7.5–13.6% SL) and pectoral spines (12.1–16.5 % SL); adult males with elongated upper lobe of caudal fin ( Fig. 6 )............................................................ Chiloglanis asymetricaudalis (Luiche) .

Figures

FIGURE 1. Dorsal view of the lower jaw and dentary dentition of three new Chiloglanis species. A. Chiloglanis igamba sp. nov., CU 94005; B. Chiloglanis kazumbei sp. nov., CU 90387; C. Chiloglanis orthodontus sp. nov., CU 90755.

FIGURE 3. Dorsal, lateral and ventral views of Chiloglanis igamba sp. nov., holotype, CU 90576, Tanzania, Kigoma Region, Malagarasi River at Lower Igamba Falls. Photo by T. R. Vigliotta. Scale bar equals 1 cm.

FIGURE 4. Dorsal, lateral and ventral views of Chiloglanis kazumbei sp. nov., holotype, CU 95230, Tanzania, Kigoma Region, Malagarasi River at rapids ~ 6.4 km upriver from Ilagala barge crossing. Photo by T. R. Vigliotta. Scale bar equals 1 cm.

FIGURE 5. Dorsal, lateral and ventral views of Chiloglanis orthodontus sp. nov., holotype, CU 90567, Tanzania, Kigoma Region, side channel of Malagarasi River around island. Photo by T. R. Vigliotta. Scale bar equals 1 cm.

FIGURE 6. Dorsal, lateral and ventral views of Chiloglanis asymetricaudalis, CU 90575, Tanzania, Kigoma Region, Luiche River. Photo by T. R. Vigliotta. Scale bar equals 1 cm.