Tidarren griswoldi, Knoflach & Harten, 2006

Knoflach, Barbara & Harten, Antonius Van, 2006, The one-palped spider genera Tidarren and Echinotheridion in the Old World (Araneae, Theridiidae), with comparative remarks on Tidarren from America, Journal of Natural History 40 (25 - 26), pp. 1483-1616 : 1559-1560

publication ID

https://doi.org/ 10.1080/00222930600940993

persistent identifier

https://treatment.plazi.org/id/DC30557E-B30E-A72A-FE7F-FF0EFD75F94E

treatment provided by

Felipe

scientific name

Tidarren griswoldi
status

sp. nov.

Tidarren griswoldi View in CoL n. sp.

( Figures 175 View Figures 172–180 , 200–203 View Figures 200–203 ; Table XVI)

Type material

Cameroon: 1♀ holotype , 3♀ paratypes, CAS, Southwest Prov. , Fako Div., Limbe Subdiv., 1.4 km NE of Etome, ca 400 m, 4 ° 02958.580N, 9 ° 07931.430E, 13–19 January 1992, leg. Larcher, Hormiga, Coddington, Griswold, and Wanzie.

Material examined

Only the types.

Etymology

The species is named in honour of Dr Charles Griswold (Californian Academy of Sciences, San Francisco), who collected numerous Tidarren specimens included in this study.

Diagnosis

Tidarren griswoldi has a pointed, triangular, anteriorly directed epigynal protuberance ( Figures 200–203 View Figures 200–203 ). Copulatory ducts are fused at entrance and short. Male unknown.

Measurements (mm)

[♀, n 54, minimum–maximum (mean).] Total length 2.11–2.35 (2.20), carapace length 0.82–0.88 (0.85), width 0.70–0.74 (0.72), length femur I 1.31–1.44 (1.37), tibia I 0.78– 0.86 (0.81). Abdomen 1.56–2.15 (1.84) high, 1.25–1.56 (1.36) long, and 1.13–1.49 (1.30) wide. Ventral side (distance petiolus to spinnerets) 0.94–1.21 (1.02) long. Clypeus 0.18– 0.20 (0.19) high. Chelicerae 0.27–0.35 (0.32) long. Sternum 0.51–0.55 (0.52) long and 0.47 wide. Labium 0.10 long and 0.19 wide. Gnathocoxae 0.28 long and 0.13 wide (mean). Leg formula 1423, see Table XVI.

Somatic features, colouration

Sternum without posterior small tubercle. Abdomen higher than long, ending in tubercle ( Figure 175 View Figures 172–180 ). Carapace uniformly dark brown. Chelicerae, gnathocoxae, and labium light brown or brown. Sternum dark, with light yellow central area surrounded by several light yellow spots. Pedipalps and legs light yellow with large dark annulations and patches. Abdomen brown to dark brown, dorsal and aboral white line pattern as in T. afrum . Sides with a few white guanin patches. Epigastric region dark, book lung covers light yellow. Venter dark with two small white spots near spinnerets. Spinnerets brown.

Epigynum, vulva ( Figures 200–203 View Figures 200–203 )

Epigynal protuberance distinctly protruding ( Figures 175 View Figures 172–180 , 200 View Figures 200–203 ), ca 0.13–0.14 mm long, directed anteriorly; its shape triangular and pointed, in lateral view tip slightly bent ( Figure 200 View Figures 200–203 ). In aboral view protuberance clearly delimited from surrounding integument ( Figure 202 View Figures 200–203 ). Copulatory ducts fused at entrance ( Figure 201 View Figures 200–203 ), short, only 0.07 mm long. Copulatory orifices at anterior border of epigynal protuberance, in ventral and dorsal view close to posterior end of receptacula. Copulatory ducts run anteriorly for a short distance and abruptly diverge laterally. They enter receptacula posteriorly, at inner side. Receptacula seminis 0.15 mm long and 0.10 mm wide. Epigynal protuberance almost as long as receptacula ( Figure 201 View Figures 200–203 ).

Distribution

Known only from the type locality in Cameroon .

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Theridiidae

Genus

Tidarren

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