Telphusa infravallata Hilgendorf, 1898: 12–13
Potamon (Potamonautes) infravallata
Rathbun, 1905: 174
Potamon (Potamonautes) usambarae Rathbun, 1933: 257
Chace, 1942: 189
Potamon infravallatus
Chace, 1942: 213
Potamonautes (Rotundopotamonautes) infravallatus
Bott, 1955: 293–294
Brachyura: Potamoidea: Potamonautidae, Platythelphusidae, Deckeniidae ()
Reed, Sadie K.
Cumberlidge, Neil
Zootaxa
2006
2006-07-17
1262
1
1
139
4M4HM
(Hilgendorf, 1898)
Hilgendorf
1898
[293,864,1524,1550]
Malacostraca
Potamonautidae
Potamonautes
Animalia
Decapoda
18
Arthropoda
species
infravallatus
Telphusa infravallata Hilgendorf, 1898: 12–13, fig 2, 2a. Potamon (Potamonautes) infravallata— Rathbun, 1905: 174. Potamon (Potamonautes) usambarae Rathbun, 1933: 257, pl. 6; Chace, 1942: 189, fig. 2. Potamon infravallatus— Chace, 1942: 213. Potamonautes (Rotundopotamonautes) infravallatus— Bott, 1955: 293–294, pl. XXV, fig. 2a–d, fig. 57.
Typematerial examined: TANZANIA: Telphusa infravallata: Usambara Mountains, Buloa, adult male type(cw 23.4, cl 15.4, ch 7.4, fw 6.5 mm) ( ZMB11378); Potamon(Pot amonautes) usambarae: male subadult cotype (cw 22.4, cl 16.8, ch 6.8, fw 6.0 mm); female subadult cotype (cw 12.2, cl 9.5, ch 4.9, fw 3.6 mm), East Usambara Mountains, Amani, xii.1926(A. Loveridge) ( MCZ7680). Additional material examined: TANZANIA: East Usambara Mountains, Amani, female (damaged), male (damaged), 8.xii.1926( A. Loveridge) ( USNM 64108); Amani, East Usambara mountains, 2 males(cws 17.1, 18.2 mm), 1.i.1964( J. N. Raybould) ( NMU TRW1964.03b); East Usambara Mountains, Amani, 3 males(cw 19.8 to cw 22 mm), adult female (cw 24.1 mm), 2 subadultfemales (cws 19.8, 21.4 mm), v.1966( J. N. Raybould) ( NMU TRW1966.12a); West Usambara Mountains, Milinga River, Tewenear Mlalo, adult female (cw 22.8 mm), 18.ii.1967( J. N. Raybould) ( NMU TRW1967.11); East Usambara Mountains, Amani, 3 juvenilemales (cw 10.9 to cw 12.1 mm), 3 juveniles(cw 9.8 to cw 12.2 mm), 3 juvenilefemales (cw 12.8 to cw 14.2 mm), 6 males(cw 15 to cw 18.4 mm), 3 subadultfemales (cw 16.9 to cw 17.3 mm), 2 adultfemales (cw 17.8 to cw 18.4 mm), subadult female (damaged), ( NMU TRW1970.06); 4 subadultfemales (cw 15.9 to cw 18.2 mm), 7 males(cw 14.7 to cw 18.6 mm), 9.iii.1972( NMU 09.03.1972); West Usambara Mountains, 3 kmnorth of Mazumbai, 1 specimen, 13.ii.1975, ( Dunbar) ( NMU TRW1975.01).
Diagnosis.Postfrontal crest distinct, granulated, complete; exorbital tooth small, low; epibranchial tooth small, granular, anterolateral margin immediately behind epibranchial tooth lined by granules; ischium of third maxilliped with deep vertical sulcus; thoracic sternal sulcus s3/s4 deep at sides, shallow across middle; sternite s4 with raised rounded marginal ridges at points where chelipeds articulate; dactylus of major cheliped of adult males slender; first carpal tooth on carpus of cheliped sharp spine; second carpal tooth subequal spine, followed by one or two small teeth; ventral margins of merus of pereiopod 1 both lined by large granules; distal meral tooth large, pointed; terminal article of gonopod 1 short, stout, tapering cone, in line with longitudinal axis of gonopod; terminal article of gonopod 1 covered entirely by fields of short spines or stiff bristles; lateral, medial folds both low, of equal size; dorsal membrane not visible. Size.Small, with an adult size range beginning at cw 23 mm.
Typelocality. Telphusa infravallata: Buloa, Usambara Mountains, Tanzania; P. usambarae: Amani, Usambara Mountains, Tanzania.
Distribution.East and West Usambara Mountains, Tanzania.
Remarks.Identification of P. infravallatuswas based on examination of the adult male typeof Telphusa infravallata Hilgendorf, 1898(cw 23.4, cl 15.4, ch 7.4, fw 6.5 mm) (ZMB 11378). Bott (1955)synonymized P. infravallatuswith Potamon (Potamonautes) usambarae Rathbun, 1933, and this is accepted here following comparison of P. infravallatusto the male cotype of P. (P.) usambaraefrom the Usambara Mountains (cw 22.8 mm) (MCZ 7680). Natural history and conservation status.The conservation status of P. infravallatusis categorized as vulnerable (VU) ( Table 4) because it has a narrow range of occurrence and a restricted area of occupancy that are both below the thresholds for vulnerable (VU) ( IUCN 2004). It is difficult to estimate the population status and trends of this species, but its population is estimated to be declining (despite the material presented here), based on indirect measures such a relatively poor representation in museum collections and increasing habitat disturbance associated with growing human populations in the region.
1926-12-08
USNM
A. Loveridge
Tanzania
East Usambara Mountains
Amani
19
USNM 64108
1
1964-01-01
NMU
J. N. Raybould
Tanzania
Amani
East Usambara mountains
19
TRW1964.03
2
2
1966-05
NMU
J. N. Raybould
Tanzania
East Usambara Mountains
Amani
19
TRW1966.12
5
3
2
1967-02-18
NMU
J. N. Raybould
Tanzania
Mlalo
West Usambara Mountains
Tewe
19
TRW1967.11
1
NMU
Tanzania
East Usambara Mountains
Amani
19
TRW1970.06
20
2
9
6
3
1972-03-09
1972-09-03
1972-03-09
NMU
Tanzania
19
11
7
4
1975-02-13
NMU
Dunbar
Tanzania
West Usambara Mountains
Mazumbai
19
TRW1975.01
1
[312,1211,1444,1470]
Tanzania
Tanzania
19
1
holotype