Potamonautes lirrangensis ( Rathbun, 1904 )

Cumberlidge, Neil & Meyer, Kirstin S., 2011, The freshwater crabs of Lake Kivu (Crustacea: Decapoda: Brachyura: Potamonautidae), Journal of Natural History 45 (29 - 30), pp. 1835-1857 : 1845-1847

publication ID

https://doi.org/ 10.1080/00222933.2011.562618

persistent identifier

https://treatment.plazi.org/id/EA456470-FFF8-6C48-FE3D-3387753DFAA6

treatment provided by

Felipe

scientific name

Potamonautes lirrangensis ( Rathbun, 1904 )
status

 

Potamonautes lirrangensis ( Rathbun, 1904) View in CoL

( Figures 6–8 View Figure 6 View Figure 7 View Figure 8 , Table 2)

Potamon (Potamonautes) lirrangensis Rathbun 1904 , pl. 14, fig. 8; Rathbun 1905: 169; 1921: 413–415, pl. 25,26, fig. 3, 8; Balss 1914: 404; 1929: 374–348; Chace 1942: 188– 189, fig. 1.

Potamon (Potamonautes) orbitospinus Cunnington 1907: 250–251 , pl. 16, fig. 1.

Potamonautes orbitospinus: Balss 1929: 439, 1936 View in CoL : fig. 18.

Potamonautes lirrangensis: Balss 1936: 188–189 View in CoL , fig. 24.

Potamon orbitospinus: Chace 1942: 218 .

Potamonautes (Lirrangopotamonautes) lirrangensis: Bott 1955: 268–270 View in CoL , pl. 26, fig. 2a–d, 38, 39, 83.

Potamonautes lirrangensis: Reed and Cumberlidge 2006: 23–25 View in CoL , pl. 5a–d, fig. 41–51, 153–154, 177; Ng et al. 2008: 171.

Material examined

Democratic Republic of Congo. Subadult male, Idjwi Island, Lake Kivu, February 1939, coll. A. Loveridge ( MCZ 11224) . Rwanda. Juvenile male (CW 30.0, CL 23.7, CH 11.2, 9.8) Lake Kivu at Gisenye , March 1936, coll. J. C. Bequaert ( MCZ 9177 View Materials ) . Malawi. Adult male (CW 46.5, CL 33.5, CH 12.8, FW 10.2) 7.2 km east-northeast of Monkey Bay , Lake Malawi, 23 May 1968, coll. D. H. Eades ( NMU TRW 1972.05 ) .

Type locality

Lirranga, at the junction of the Congo and Ubangi Rivers, Democratic Republic of Congo.

Diagnosis

Carapace medium height ( CH / FW 1.25); postfrontal crest distinct, complete; grooves on posterior part of carapace deep; exorbital tooth large, forward pointing spine; epibranchial tooth small spine; anterolateral margin behind epibranchial tooth curving strongly outward, then curving inward over posterolateral margin, lined by either granules or small teeth ( Figure 6A View Figure 6 ); vertical sulcus on ischium of third maxilliped faint to absent; suborbital, subhepatic regions of carapace sidewall with granules; suborbital margin and horizontal sulcus of carapace sidewall both granulated ( Figure 6B View Figure 6 ); first carpal tooth on carpus of cheliped large, sharp spine; second carpal tooth small spine, smaller than first tooth; ventral margins of merus of pereiopod 1 both heavily granulated; distal meral tooth sharp spine ( Figure 6A,C View Figure 6 ).

Distribution

Lake Kivu, Democratic Republic of Congo and Rwanda, Lake Tanganyika in Tanzania, and Lake Malawi in Malawi ( Figure 8 View Figure 8 ).

Conservation status

Potamonautes lirrangensis View in CoL was assessed as Least Concern (LC) using the IUCN Red List criteria ( IUCN 2003; Cumberlidge et al. 2009, appendix) because it has a wide distribution, has been caught recently from a number of different localities, is well represented in museum collections, and has no known threats (Cumberlidge 2008c).

Remarks

A number of previous authors ( Cunnington 1907; Balss 1929, 1936) have reported on the presence of P. lirrangensis in Lake Kivu (as Potamon orbitospinus ), and Chace (1942) illustrated the carapace and GO1 of the specimen of P. lirrangensis from the lake (MCZ 11224). However, Bott (1955) was the first to consider Potamonautes lirrangensis to be the valid name for the species also described as Potamon orbitospinus Cunnington, 1907 , with P. lirrangensis being the senior synonym. Reed and Cumberlidge (2006) upheld this opinion and provided a redescription, photographs and illustrations of taxonomically important characters for P. lirrangensis , as well as a detailed distribution map for the species, but they did not include any localities from Lake Kivu. Another taxon, Potamonautes (Lirrangopotamonautes) lirrangensis adeleae Bott, 1968 , from the Democratic Republic of Congo near the Angolan border, was originally described as a subspecies of Potamonautes (Lirrangopotamonautes) lirrangensis , but was later recognized as the separate species P. adeleae Bott, 1968 , by Cumberlidge and Tavares (2006) and Ng et al. (2008). The type locality of P. lirrangensis is Lirranga on the Congo River in the Democratic Republic of Congo, and its range includes the Upper Congo River in Central Africa and a number of localities along the Rift Valley in Lakes Kivu, Tanganyika and Malawi ( Reed and Cumberlidge 2006).

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Potamonautidae

Genus

Potamonautes

Loc

Potamonautes lirrangensis ( Rathbun, 1904 )

Cumberlidge, Neil & Meyer, Kirstin S. 2011
2011
Loc

Potamonautes lirrangensis:

Ng PKL & Guinot D & Davie PJF 2008: 171
Reed SK & Cumberlidge N 2006: 25
2006
Loc

Potamonautes (Lirrangopotamonautes) lirrangensis:

Bott R 1955: 270
1955
Loc

Potamon orbitospinus: Chace 1942: 218

Chace FA 1942: 218
1942
Loc

Potamonautes lirrangensis:

Balss H 1936: 189
1936
Loc

Potamonautes orbitospinus:

Balss H 1929: 439
1929
Loc

Potamon (Potamonautes) orbitospinus

Cunnington W 1907: 251
1907
Loc

Potamon (Potamonautes) lirrangensis

Chace FA 1942: 188
Balss H 1929: 374
Balss H 1914: 404
Rathbun M 1905: 169
1905
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