Acumontia rostrata Pocock, 1902

Mendes, Amanda C. & Kury, Adriano B., 2012, Notes on the systematics of the Triaenonychinae from Madagascar with description of a new species of Acumontia Loman (Opiliones: Laniatores), Zootaxa 3593, pp. 40-58 : 48

Acumontia rostrata Pocock, 1902

( Figs. 5 A–B, 13)

Acumontia rostrata Pocock 1902: 405 , fig. 82A (part, 3 only); Pocock 1903: 441, pl. 11, figs. 2–2a (penis); Staręga 1992: 281. Triacumontia rostrata: Roewer 1915: 123 , fig. 32; Roewer 1923: 613, fig. 768; Lawrence 1959: 44.

Type data. 3 holotype, ( BMNH, examined), from MADAGASCAR, [FIANARANTSOA], Ambohimitombo, Tanala district.

Notes. Pocock (1902) originally described and illustrated males and females (with metatarsal notch!) of this species. The females resulted to be males of A. echinata , while the males were conserved in A. rostrata ( Pocock 1903) . Pocock (1903) also mentioned that the males did not have a metatarsal notch and provided a [too] schematic illustration of the penis. Roewer (1915; 1923) transferred this species to Triacumontia and repeated Pocock’s illustration of the male lateral habitus. Lawrence (1959) did not bring any new information, while Staręga (1992) brought it back to Acumontia .

Diagnosis. Differs from A. alluaudi , A. armata , A. capitata , A. cowani , A. echinata , A. flavispina and A. majori by spines of anterior margin with size similar to the processes of cheliceral sockets. Differs from A. soerenseni by two spines on lateral side of anterior margin instead of one. Differs from A. cowani by having the two pairs of spines of areas II–III with size comparable to the armature of ocularium. Differs from A.majori and A. roberti by the spines of area III widely separated at base and divergent from each other. Differs from A. pococki and A. roeweri by the large spines on free tergites. Differs from A nigra , A. spinifrons and A. venator by median pair of spines on free tergite I. Differs from A. alluaudi , A. capitata , A. cowani , A. flavispina , A. hispida , A. horrida , A. hystrix , A. longipes , A. milloti , A. remyi and A. succinea sp. nov. by the shape of the two ventro-basal apophyses of the femur of pedipalps blunt instead of spiniform. Differs from A. alluaudi , A. flavispina , A. hispida , A. horrida and A. succinea sp. nov. by having five tarsomeres in tarsus I of male. Very similar to A. roberti , differing by the trochanter of pedipalp dorsally unarmed, and by the small tubercles on the anterior margin of carapace.

Figures

FIGURE 5. Acumontia rostrata Pocock, 1902, habitus of male syntype (BMNH): A, dorsal view; B, lateral view. Scale bars = 2 mm.