Dicristatus, Irfan & Wang & Zhang, 2023

Irfan, Muhammad, Wang, Lu-Yu & Zhang, Zhi-Sheng, 2023, Survey of Linyphiidae spiders (Arachnida: Araneae) from Wulipo National Nature Reserve, Chongqing, China, European Journal of Taxonomy 871, pp. 1-85 : 8

Dicristatus gen. nov. (二叉蛛属)

urn:lsid:zoobank.org:act:532E0F83-75FE-440E-9007-A1F7A4460AC4

Type species

Dicristatus minutus gen. et sp. nov.

Etymology

The generic name is an arbitraty combination of letters. Gender is masculine.

Diagnosis

Dicristatus gen. nov. can be distinguished from all other Erigoninae genera by the following combination of features: in male palp, retrolateral tibial apophysis absent; dorsal tibial apophysis large, tongue-shaped in ventral view, retrolateral margin with a row of comb macrosetae, ventrally with a pair of comb-shaped projections with several teeth; cymbial retrobasal process with a small projection, extending retrolaterally, covering basal part of paracymbium; paracymbium J-shaped, distal arm tip with ventral indent; distal suprategular apophysis robust, distally bifurcated, completely covering the embolus. Embolic division: Anterior radical process elongated, strongly sclerotized, outer surface serrated; embolic membrane reduced, curved with pointed end; embolus strongly sclerotized, minute with pointed end, hardly visible on undissected palp ( Fig. 4 ). Female can be distinguished by the following combination of features: copulatory ducts extending posteriorly above the epigastric furrow, forming a broad loop outside the ventral plate; dorsal plate heart-shaped ( Fig. 5 ).

Figures

Fig. 4. Dicristatus minutus gen. et sp. nov., ♂ holotype (SWUC-T-LIN-04-01), left palp. A. Prolateral view. B. Retrolateral view. C. Dorsal view. D. Ventral view.

Fig. 5. Dicristatus minutus gen. et sp. nov., ♀ paratype (SWUC-T-LIN-04-02). A, C–D. Epigyne, ventral view. B. Epigyne, lateral view. E. Vulva, dorsal view.