Chumma foliata, 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 : 7-9

Chumma foliata sp. nov.

urn:lsid:zoobank.org:act:09349F06-E7C8-42C2-B073-54F7340B1331 Figs 2 B–D, 3A–F, 12

Diagnosis

Males of C. foliata sp. nov. are recognized by the palpal tibia with a small pointed dorsal tooth and the large foliate dorsal part of the RTA and the long, slender, anterior projection of the tegulum; the female is recognized by the epigyne with two large copulatory openings in the centre.

Etymology

The specific epithet refers to the foliate upper RTA.

Material examined

Holotype

SOUTH AFRICA: ♂, Eastern Cape Province, Amatola Mts, Hogsback , 32°33.727′ S, 26°54.924′ E, 1460 m a.s.l., grass tussocks, alpine grassland, 28 Nov. 2013, C. Haddad and J. Neethling leg. ( NCA 2015 /4654).

Other material

SOUTH AFRICA: 3 ♂♂, 4 ♀♀, same data as for holotype ( NCA 2015/4655); 2 ♂♂, 2 ♀♀, 3 juveniles, South Africa, Eastern Cape Province, Amatola mountains, Hogsback, Amatola Forestry Company, 32°37.671′ S, 26°58.311′ E, 1210 m a.s.l., grass tussocks in Fynbos, 28 Nov. 2013, C. Haddad leg. ( NCA 2015/4656); 1 ♂, collecting data as for preceding ( NCA 2013/4652).

Description

Male

BODY MEASUREMENTS. TL 2.33, CL 1.00, CW 0.83, CH 0.57.

CARAPACE. Pale yellow with some faint darker patches. Chelicerae, sternum and legs uniform yellow ( Fig. 3A ).

ABDOMEN. Dorsum with poorly sclerotized marbled scutum with few long supple setae in front, sockets on pale circles, apodemes slightly impressed; sides and venter pale with few apodemes in two rows; transverse group of setae in front of spinnerets.

EYES. AME: 0.17; ALE: 0.20; AME–AME: 0.07; AME–ALE: 0.03; PME: 0.20: PLE: 0.20; PME–PME: 0.17; PME–PLE: 0.10. Clypeus 0.20 or 1.00 times width of ALE.

STERNUM. Length 1.63, width 1.57, almost as wide as long.

LEGS. Anterior pairs of tarsi slightly curved, not fusiform. All Fe with one dorsal spine, Fe I with one prolateral spine.

PALP ( Figs 2 B–D, 3C–D). Tibia with large RTA, dorsal one with large rounded flap and short curved tip, ventral one short, massive, truncated at tip, with concave ventral sides; cymbium with triangular extension at retrolateral base, fitting in concavity between RTA; tegulum with slender, sharp ventral prong; embolus short, broad, strongly curved and truncated.

Female

BODY MEASUREMENTS. TL 2.83, CL 1.07, CW 0.97, CH 0.50.

COLOUR AND PATTERNS. Very similar to male ( Fig. 3B ).

EYES. AME: 0.17; ALE: 0.23; AME–AME: 0.07; AME–ALE: 0.07; PME: 0.20; PLE: 0.23; PME–PME: 0.23; PME–PLE: 0.13. Clypeus 0.27 or 1.17 times width of ALE.

STERNUM. Length 1.90, width 1.80, almost as wide as long. EPIGYNE ( Fig. 3 E–F). With two large, rounded copulatory openings leading directly into the spermathecae, separated by broad scape, delimiting a membranous area in front of the epigastric fold.

Distribution

Known from the Amatola Mts in the Eastern Cape Province in South Africa ( Fig. 12 ).

Figures

Fig. 2. A. Chumma bicolor sp. nov., paratype, ♀, epigyne, ventral view. – B–D. Chumma foliata sp. nov., holotype, ♂. B. Palp, ventral view. C. As preceding, retrolateral view. D. Palpal tibia, dorsal view. Scale bars: 0.2 mm.

Fig. 3. Chumma foliata sp. nov. A, C–D = holotype, ♂. B, E–F = paratype, ♀. A. Habitus, dorsal view. B. Habitus, dorsal view. C. Palp, dorsal view. D. As preceding, ventral view. E. Epigyne, ventral view. F. Epigyne, cleared, dorsal view. Scale bars: A–B = 0.5 mm; C–F = 0.2 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. (●).