Chumma subridens,

Jocqué, Rudy & Alderweireldt, Mark, 2018, New Chummidae (Araneae): quadrupling the size of the clade, European Journal of Taxonomy 412, pp. 1-25: 17-20

publication ID

https://doi.org/10.5852/ejt.2018.412

publication LSID

lsid:zoobank.org:pub:F682863D-C20B-4DE7-97B9-4EB0D4E20649

DOI

http://doi.org/10.5281/zenodo.3816241

persistent identifier

http://treatment.plazi.org/id/953B8A2E-FF82-B41D-FDAC-FA61FC32FC48

treatment provided by

Valdenar

scientific name

Chumma subridens
status

sp. nov.

Chumma subridens  sp. nov.

urn:lsid:zoobank.org:act:238E4AF9-FFC1-4EAE-8DA0-3A14C1057CE7 Figs 8View Fig B–E, 9A–G, 12

Diagnosis

The male of C. subridens  sp. nov. is recognized by the shape of the double RTA and by the very short truncated embolus and tiny membranous MA; the female is characterized by the epigyne with slightly procurved posterior rim and the oval spermathecae slightly tapered towards the centre.

Etymology

The specific epithet subridens  is derived from the Latin verb ‘ subridere ’, to smile, and refers to the pattern of the epigyne.

Material examined

Holotype

SOUTH AFRICA: ♂, Eastern Cape Province, Fort Fordyce Nature Reserve , overhanging vegetation in afromontane forest, 32°41.133′ S, 26°29.875′ E, 1090 m a.s.l., 30 Nov. 2013, C. Haddad leg. ( NCA 2013 /4474).

GoogleMaps 

Paratypes

SOUTH AFRICA: 2 ♀♀, together with holotype; 1 ♀, Eastern Cape Province, Fort Fordyce Nature Reserve, leaf litter in afromontane forest, 32°41.226′ S, 26°29.622′ E, 1015 m a.s.l., 30 Nov. 2013, C. Haddad and J. Neethling, leg. ( NCA 2013/4439).

Other material

SOUTH AFRICA: 1 ♀, Western Cape Province, Cape Town, Table Mountain National Park, 33.97° S, 18.42° E, 23 May 2008, sifting leaf litter in afrotemperate forest, C. Uys leg. ( NCA 2010/1399); 1 ♀, Cape Town, Signal Hill, under stones, 33°54.69′ S, 18°24.12′ E, 3 May 1976, A. Russell-Smith leg. ( MRAC 241637).

Description

Male

BODY MEASUREMENTS. TL 2.50, CL 1.13, CW 0.93, CH 0.43.

CARAPACE. Pale yellow with faint pale brown pattern ( Fig. 9AView Fig); chelicerae, sternum and legs pale yellow.

ABDOMEN. With medium brown scutum with dispersed spines, each socket in front of small white spot; four apodemes, poorly impressed; sides and venter white with few apodemes.

EYES. AME: 0.13; ALE: 0.27; AME–AME: 0.13; AME–ALE: 0.03; PME: 0.20; PLE: 0.27; PME–PME: 0.20; PME–PLE: 0.07. Clypeus 0.13 or 0.48 times width of ALE.

STERNUM. Length 1.60, width 1.57, as long as wide.

LEGS. One prolateral spine on femur I.

PALP ( Figs 8View Fig B–D, 9C–E). Tibia with two apophyses; dorsal one with two sharp tips; ventral one massive, slightly widened towards indented tip; subtegulum with dark sclerotized rim; embolus short, broad at base, with tiny spines, tapered distally; MA a narrow membranous prong.

Female

BODY MEASUREMENTS. TL 3.17, CL 1.07, CW 1.07, CH 0.67.

COLOUR AND PATTERNS. Very similar to male, but abdominal scutum smaller, covering only two-thirds of dorsum ( Fig. 9BView Fig).

EYES. AME: 0.17; ALE: 0.30; AME–AME: 0.03; AME–ALE: 0.03; PME: 0.20: PLE: 0.27; PME–PME: 0.20; PME–PLE: 0.07. Clypeus 0.23 or 0.77 times width of ALE.

STERNUM. Length 1.87, width 1.83. Almost as wide as long. EPIGYNE ( Figs 8EView Fig, 9View Fig F–G). With two small copulatory openings separated by narrow scape, adjacent to epigastric furrow; posterior rim slightly procurved; spermathecae large, oval, slightly tapered towards the centre.

Distribution

Known from the type locality in the Eastern Cape Province and from the Western Cape Province in the vicinity of Table Mountain in South Africa ( Fig. 12View Fig). The identity of the latter specimens remains doubtful and they were, therefore, not included as paratypes.

MRAC

Musée Royal de l’Afrique Centrale

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Chummidae

Genus

Chumma