Penestomus

Anna S. Dippenaar-Schoeman, 1989, The African species of the subfamily Penestominae (Araneae: Eresidae): with descriptions of two new species, Phytophylactica 21, pp. 131-134 : 131

publication ID

DippenaarSchoeman1989Penestominae

DOI

https://doi.org/10.5281/zenodo.3513218

persistent identifier

https://treatment.plazi.org/id/215EE557-FE00-D0D2-7092-DAAD78833B0F

treatment provided by

Jeremy

scientific name

Penestomus
status

 

Penestomus Simon, 1902

Penestomus Simon, 1902: 241 View Cited Treatment ; Lehtinen, 1967: 257, 390 View Cited Treatment .

Type species: Penestomus planus Simon , 1902.

Diagnosis

The flattened body, small size and the position of the eyes distinguish Penestomus from other eresids.

It differs from Wajane in having a cribellum, no patterns on the abdomen and a slightly different eye pattern.

Description

Female. Size: small to medium-sized spiders (4,4-7,0 mm). Colour of carapace reddish brown to dark brown; smooth and shiny, with scattered long black setae covering the dorsal surface interspersed by thicker white setae. Carapace longer than wide, subrectangular and flattened, sides subparallel, slightly narrower in caphalic area, posteriorly and anteriorly truncated with clypeus centrally protruding (Fig. 3). Fovea oval, shallow depression. Eyes in two rows, situated close to anterior edge; anterior row straight, posterior row recurved; eyes small, lateral eyes slightly larger than median eyes; MOQ wider than long, narrower in front; ALE situated close to anterior margin; both AME and PME nearer to each other than to lateral eyes; PLE widely spaced (Fig. 1). Chelicerae long, obliquely directed; anterior margin of cheliceral groove with small chitinous keel armed with small teeth. Maxillae parallel to each other, longer than wide. Sternum oval, caudally projecting between fourth coxae. Abdomen long oval, slightly depressed dorsally, covered with short black setae, uniformly pale ventrally. Legs short, robust; leg formula 4123; coxae long, especially leg IV; three tarsal claws, paired claws pectinate. Cribellum indistinct, oval, bipartite; calamistrum bi- or uniseriate. Epigynal plate large, reddish brown.

Male Unknown.

Distribution

Known only from the Cape Province, South Africa.

Relationship

Closely related to Wajane from which it differs in having a cribellum, no pattern on the abdomen and a slightly different eye pattern.

Bionomics

Nothing is known of P. planus . Adult females of P. croeseri spec. nov. have been collected from the soil surface in riverine bush in Grahamstown.

AME

USA, Florida, Gainesville, University of Florida, Florida Museum of Natural History, Allyn Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Penestomidae