Chumma bicolor, Jocqué & Alderweireldt, 2018

Jocqué, Rudy & Alderweireldt, Mark, 2018, New Chummidae (Araneae): quadrupling the size of the clade, European Journal of Taxonomy 412, pp. 1-25 : 4-6

Chumma bicolor sp. nov.

urn:lsid:zoobank.org:act:5AA2B187-E836-451B-9A88-2707AA478AE7 Figs 1 A–E, 2A, 12

Diagnosis

Chumma bicolor sp. nov. differs from related species by the contrasting dark areas on the abdomen; the spermathecae are provided with a large ventral atrium in front.

Etymology

The specific epithet is an adjective obviously referring to the contrasting colouration of the abdomen.

Material examined

Holotype

SOUTH AFRICA: ♀, Western Cape Province, Goukamma , 34°03.478′ S, 22°56.315′ E, beating shrubs on path near forest lodge, 31 Jan. 2014, R. Jocqué and E. Tybaert leg. ( MRAC 244719 ).

Paratype

SOUTH AFRICA: ♀, same data as for holotype ( MRAC 244720).

Note

On 2 February 2017, shrub beating was carried out during three hours at the type locality in search of males of the species. No extra specimens were found.

Description

Female

BODY MEASUREMENTS. TL 3.17, CL 1.27, CW 1.10, CH 0.53.

CARAPACE. Pale yellow with orange patches ( Fig. 1 A–C).

ABDOMEN ( Fig. 1B ). Pale, with yellow orange scutum with reddish apodemes; posterior half with dark patch on either side; venter, sternum and spinnerets pale yellow. Entirely covered with short spines, each socket just in front of pale spot.

EYES. AME: 0.20; ALE: 0.30; AME–AME: 0.07; AME–ALE: 0.07; PME: 0.20: PLE: 0.30; PME–PME: 0.20; PME–PLE: 0.17. Clypeus 0.23 or 0.77 times width of ALE.

STERNUM. Length 1.97, width: 1.77.

LEGS. One prolateral spine on femur I.

EPIGYNE ( Figs 1 D–E, 2A). Dark area with narrow transverse plate near posterior rim; central dark swelling with posterior extension in longitudinal axis; spermathecae large, rounded, with large ventral atrium in front near centre.

Male

Unknown.

Distribution

Only known from the type locality in the Western Cape Province in South Africa ( Fig. 12 ).

Figures

Fig. 1. Chumma bicolor sp. nov., paratype, ♀. A. Habitus, dorsal view. B. Abdomen, dorsal view. C. Habitus, ventral view. D. Epigyne, ventral view. E. Epigyne, cleared, dorsal view. Scale bars: A–C = 0.5 mm; D–E = 0.1 mm.

Fig. 12. Distribution map of Chumma spp.: C. bicolor sp. nov. (▲); C. foliata sp. nov. (●); C. gastroperforata Jocqué, 2001 (●); C. inquieta Jocqué, 2001 (Ǫ); C. interfluvialis sp. nov. (■); C. lesotho sp. nov. (●); C. striata sp. nov. (●); C. subridens sp. nov. (●); C. tsitsikamma sp. nov. (●).