Anansus atewa, Huber, Bernhard A. & Kwapong, Peter, 2013

Huber, Bernhard A. & Kwapong, Peter, 2013, West African pholcid spiders: an overview, with descriptions of five new species (Araneae, Pholcidae), European Journal of Taxonomy 59, pp. 1-44 : 21-24

publication ID

https://dx.doi.org/10.5852/ejt.2013.59

publication LSID

lsid:zoobank.org:pub:F3B32952-A769-4A41-92EB-3EBF52AD7F7F

DOI

https://doi.org/10.5281/zenodo.6147734

persistent identifier

https://treatment.plazi.org/id/9EC8FF7E-F56B-4FAD-9B48-730CE2795474

taxon LSID

lsid:zoobank.org:act:9EC8FF7E-F56B-4FAD-9B48-730CE2795474

treatment provided by

Jeremy

scientific name

Anansus atewa
status

sp. nov.

Anansus atewa sp. nov.

urn:lsid:zoobank.org:act:9EC8FF7E-F56B-4FAD-9B48-730CE2795474

Figs 9-10 View Figs 1 - 13. 1 , 23 View Figs 23 - 24 , 35-47 View Figs 35 - 42 View Figs 43 - 47

Diagnosis

Easily distinguished from known congeners by distinct pair of projections on male clypeus ( Figs 35, 39 View Figs 35 - 42 ; other known species with single tiny median process); also by male cheliceral apophyses (more proximal, wider apart, and more pointed than in other known species; Figs 39 View Figs 35 - 42 , 45 View Figs 43 - 47 ), by shape of procursus (large ventral curved sclerite; without retrolateral sclerite provided with brush of long hairs; without ventral pointed projection; Figs 38 View Figs 35 - 42 , 44 View Figs 43 - 47 ), and by more anterior position of epigynal pockets ( Figs 41 View Figs 35 - 42 , 46 View Figs 43 - 47 ).

Etymology

The species name is a noun in apposition, derived from the type locality.

Type material

Holotype ♂, in ZFMK ( Ar 10513 ) GoogleMaps .

Type data

GHANA: Eastern Region: Atewa Hills, Atewa Atwirebu Reserve   GoogleMaps (6°13.8’N, 0°33.5’W), 740 m a.s.l., 25 Feb. 2013 (B.A. Huber).

Other material examined

GHANA: Eastern Region: 4 ♀♀ together with holotype GoogleMaps ; 2 ♂♂ 2 ♀♀ in ZFMK ( Ar 10514 ), same data, specimens taken alive and died from heat GoogleMaps ; 2 ♀♀ 5 juvs in pure ethanol in ZFMK ( Gha 137 ), same data GoogleMaps .

Description

Male (holotype)

MEASUREMENTS. Total body length 1.5, carapace width 0.6. Leg 1: 5.2 (1.3 + 0.2 + 1.4 + 1.6 + 0.7), tibia 2: 0.9, tibia 3: 0.7, tibia 4: 1.1; tibia 1 L/d: 22. Distance PME-PME 25 µm, diameter PME 80 µm, distance PME-ALE 20 µm, no AME.

COLOR. Carapace ochre-grey, slightly darker medially, sternum with four pairs of dark lines extending from behind labium to bases of leg coxae, legs pale ochre-yellow, without rings, abdomen ochre-gray with distinct dark median dorsal mark.

BODY. Habitus as in Figs 35-36 View Figs 35 - 42 ; ocular area barely elevated; carapace without median furrow; clypeus with distinct pair of projections at rim ( Fig. 35 View Figs 35 - 42 ); sternum wider than long (0.40/0.35), unmodified. Chelicerae as in Fig. 45 View Figs 43 - 47 , with pair of lateral processes proximally and pointed frontal apophyses, without stridulatory ridges.

PALPS. As in Figs 37-38 View Figs 35 - 42 and 43-44 View Figs 43 - 47 , coxa unmodified, trochanter with indistinct ventral projection, femur small relative to tibia, with small retrolatero-ventral process and larger prolatero-ventral process set with tubercles, procursus complex, entire distal part apparently hinged against basis, without elements distinctive for other known species (retrolateral sclerite provided with brush of long hairs; ventral pointed projection), bulb with single weakly sclerotized process (embolus).

LEGS. Without spines and curved hairs, few vertical hairs; retrolateral trichobothrium on tibia 1 at 25%; prolateral trichobothrium absent on tibia 1, present on other tibiae; tarsus 1 with about ten indistinct pseudosegments.

VARIATION. Tibia 1 in 2 other males: 1.3, 1.4.

Female

In general similar to male; tibia 1 in 6 females: 1.2-1.4 (mean 1.3). Epigynum consisting of large anterior plate provided with pair of pockets and narrow posterior plate ( Figs 40, 41 View Figs 35 - 42 , 46 View Figs 43 - 47 ); internal genitalia as in Figs 42 View Figs 35 - 42 and 47 View Figs 43 - 47 .

Natural history

The spiders were found in the leaf-litter under leaves that are curved in a way to produce protected space on the underside. Two eggsacs contained 13 and 15 eggs respectively.

Distribution

Known from type locality only ( Fig. 23 View Figs 23 - 24 ). Further juvenile specimens from near Mpraeso and from Tagbo Falls (Ghana; in ZFMK) might also belong to this species.

ZFMK

Germany, Bonn, Zoologische Forschungsinstitut und Museum "Alexander Koenig"

AME

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

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Anansus