112 



N. CUMBERLIDGE 



ture records are generally not reliable, and have not been 

 included. 



The following abbreviations are used: AMNH, American 

 Museum of Natural History, New York, NY, USA; FMC, 

 Field Museum, Chicago, IL, USA; MCZ, Museum of Com- 

 parative Zoology, Harvard, MA, USA; MNHN, Museum 

 National dHistoire Naturelle, Paris; NHM, The Natural 

 History Museum, London, UK; NNH, Nationaal Natuurhis- 

 torisches Museum, Leiden, The Netherlands; NMU, North- 

 ern Michigan University, Marquette, MI, USA; RCM, Royal 

 Congo Museum, Tervuren, Belgium; SMF, Senckenberg 

 Museum, Frankfurt am M., Germany; USNM, The United 

 States National Museum of National History, Smithsonian 

 Institution, Washington, DC, USA; ZIM, Zoological Insti- 

 tute and Museum, Hamburg, Germany; ZMB, Museum fur 

 Naturkunde der Humboldt-Universitat, Berlin, Germany; 

 CW = carapace width at widest point; CL = carapace length, 

 measured along median line; CH = cephalothorax height, 

 maximum height of cephalothorax; FW = front width, width 

 of front measured along anterior margin; m = male; f = 

 female; coll. = collected by. 



SYSTEMATIC ACCOUNT 



Sudanonautes floweri (De Man, 1901) 



(Figs 1 a-i, 2 a-j, 3 a,b, Table 1) 



Potamon (Potamonautes) floweri; De Man, 1901:94-98, 

 100-101, pi. X (fig. 1-7); Rathbun, 1904, pi. XVII (figs 2, 

 6); Rathbun, 1905:193-195; Rathbun, 1921:406-410, fig. 6, 

 pi. XX (fig. 2); Parisi, 1925:99. 



Potamon {Potamonautes) aubryi; Balss, 1914, p. 405 (except 

 ZIM K13557 from Mukonje farm, Cameroon, not Pota- 

 mon aubryi H. Milne Edwards, 1853). 



Potamonautes floweri; Balss, 1936:171, fig. 6. 



Potamon floweri; Flower, 1931:734; Chace, 1942:211; 

 Capart, 1954:834, fig. 21. 



Sudanonautes (Convexonautes) aubryi floweri; Bott, 

 1955:304-306, fig. 65, 100, a-b, pi. XXVIII (fig 2 a-d); 

 Monod, 1977:1218; Monod, 1980:384-385. 



Diagnosis. Mandibular palp 2-segmented; terminal seg- 

 ment single, undivided, with small hard, hair-fringed flap at 

 junction between segments (Fig. 2 a-c). Terminal segment of 

 gonopod 1 with raised lobe on cephalic part, separated from 

 caudal part by a conspicuous longitudinal groove; subtermi- 

 nal segment of gonopod 1 distinctly broadened on outer 

 margin (Fig. 2 d-f). Conspicuous raised ridges on sternum at 

 points where chelipeds articulate (Fig. 1 c). Carapace greatly 

 arched (CH/CL = 0.61, Fig. 1 b), very wide (CW/CL = 1.51, 

 Fig. 1 a). Vertical suture separating sub-branchial and subor- 

 bital regions meeting anterolateral margin at base of interme- 

 diate tooth (Fig. 1 b). 



Distribution. Nigeria, Cameroon, Bioko (= Fernando 

 Po), Central African Republic, Sudan, Zaire, Congo, Gabon, 

 Cabinda, Angola. It is likely that 5. floweri is also present in 

 Equatorial Guinea. Rathbun (1921) and Balss (1936) pro- 

 vided details of the distribution of the species in Zaire. 

 Monod (1980) reported S. floweri from the basins of the Nile, 

 Zaire, Chari, and Lake Chad. The present work adds several 

 new localities in Nigeria, Bioko, and northern Angola. 



MATERIAL 



Lectotype. NHM reg. 1901.8.26.2, lm (CW 48.5, CL 30.5, 

 CH 17.8, FW 11.7 mm), from Bahr el Gebel, Sudan, coll. 

 Capt. S. S. Flower, 26.viii.1901. This specimen is here 

 designated the lectotype of S. floweri. De Man did not specify 

 types, so the material he examined was syntypic. 



Others. The catalogue number of material held at NHM 

 and NMU begins with the date (year, month, day) of 

 collection or acquisition. NIGERIA. NHM 1895.5.5.1^, 

 Asaba, 150 miles up the Niger, coll. N. H. Crosse. NHM 

 1905.6.5.98-100, Sapele, junction of Jameson and Aethiop 

 rivers, coll. Dr. Ansoroye. NHM 1910.4.30.19-22, Oban 

 southern Nigeria, coll. P. A. Talbot. NHM 1938.7.1, Obubra, 

 southern Nigeria, coll. I. Sanderson. RCM 52.889, Jos, 1967, 

 coll. E. B. Guong. NMU 8-12. V. 1975, Rosse, at Iguoriokhi, 

 Bendel State, If, 8-12. v. 1975, coll. Bruce Powell. NMU 

 24. IV. 1980, first or second roadside culvert, Calabar, If (CW 

 45.5 mm) dug from burrow, coll. J. C. Reid. NMU 

 30.IV. 1982, Ogoja, Cross River State, lm, CW 50 mm, dug 

 from hole at edge of swamp at Ogoja, rain forest/ woodland 

 savanna, coll. B. D. Barrett. NMU 4.1.1983, Kaduna river 

 (year-round flow), Kaduna State, 4m, coll. Fatima Abdulka- 

 dir. NMU 1. III. 1983, dug from holes, Kaduna, Kaduna 

 State, coll. Fatima Abdulkadir. NMU 4.IV.1983, foot of 

 Obudu plateau, Cross River State, lm, fast white water, big 

 rocks, small rocks, sand gravel bottom, caught by villagers, 

 who dammed stream, dried river bed, caught crabs under 

 rocks, (with 5. africanus, S. granulatus), coll. N. Cumber- 

 lidge. NMU 12. XII. 1983, Yankari Game Reserve, Bauchi 

 State, Hippo Pool, dug from holes, lm, If, coll. N. Cumber- 

 lidge. NMU 30. IV. 1984, pond near tributary of river Niger 

 (20 km east of river), Otta, Benue State, If, (CW 54 mm), 

 coll. John Iyage. NMU 12. VI. 1984, dug from holes in banks 

 of river Samu, tributary of Niger, Pasakwauri, near Kagoro, 

 Kaduna State, lm, If, coll. N. Cumberlidge. ZIM K3484, 

 Benin, lm, 2f, xii.1909, coll. C. Manger. ZIM K30252, Njaba 

 creek, 15. hi. 1973, coll. J. Voelker. ZIM K30314, Cross river, 

 near Arochukwu, 6.iv.l974, coll. J. Voelker. CAMEROON. 

 NHM 1938.7.1.9-13, Mamfe, coll. I. Sanderson. NHM 

 2. VIII. 1968, Kindongo, south Bakundu, west Cameroon, in 

 hole on forest floor about 100 yds from nearest (non- 

 permanent) water, coll. T. S. Jones. RCM 54.190, Kombe- 

 tiko, 5 km from Batouri, river Tanadi, 3 specimens, 2.ii. 1976, 

 coll. F. Puylaert. RCM 53.389, Olounou, 15-30 specimens, 

 15-17. viii. 1971, coll. F. Puylaert. RCM 54.198, Bissiri May- 

 erey, 20. i. 1976, coll. F. Puylaert. SMF 2098, Bibundi, 

 20.viii.1948, coll. Justus Weil. SMF 2868, Bibundi, coll. 

 Justus Weil. SMF 1787, Victoria, 1907, O. Valley. NMU 

 24.X. 1970, near Mamfe, crossing road by Baduma village, 

 Kumba-Mamfe road, If, coll. R. H. L. Disney. ZIM K3526, 

 lm, If, 24.xii.1911, coll. Dr. E. Fickendey. ZIM K25447, 

 Duala, lm, 4.X.1912, C. Manger. ZIM K30397, Kembong, 

 near Mamfe, 26. iv. 1975, coll. J. Voelker. ZMB 5552, Djeer- 

 fluss, lm, coll. Schweinfurth. ZMB 7789, Benue, 

 4-9.viii.1889, coll. Staudinger. ZMB 8234, Barombi Lake, If, 

 coll. Zeuner. ZMB 10023, If, coll. Preuss. ZMB 10216, 

 Johann Albrechtshohe (modern name unknown, 4°40'N, 

 9°20'E), If, coll. Conradt. ZMB 13718, Victoria, If, coll. 

 Deutsche Tiefsee Expedition. ZMB 14342, Douala, 2f, 

 5.xi.l910, coll. Shaeffer. ZMB 16440, Barombi Station, lm, 

 1891, coll. Preuss. ZMB 16947, Douala, lm, coll. Thorbeke. 



