Grandilithus Liu & Li, 2022

Mu, Yannan & Zhang, Feng, 2023, Further additions to the guardstone spider fauna from China (Araneae: Phrurolithidae), Zootaxa 5338 (1), pp. 1-104 : 21

Grandilithus Liu & Li, 2022

Grandilithus Liu et al., 2022: 25

(type species: Grandilithus anyuan Liu & Li, 2022 , by original designation).

Diagnosis. This genus can be distinguished from the other phrurolithid genera by the carapace white or yellow, with several distinct markings resembling flowing water droplets beside the fovea; abdomen yellow to black, with a short and thin dorsal scutum anteriorly, without chevron stripes posteriorly in dorsal view; the male palpal femur has a well-developed apophysis distally and tibia with single retrolateral apophysis; the female epigyne with gobletshaped median septum and nearly globular-shaped copulatory ducts.

Description. Medium-sized spiders. Carapace flat, white to yellow, with several distinct markings resembling flowing water droplets beside fovea. Chelicerae with two (one long and another short) spine anteriorly. Femora I–II with one or two dorsal spines; femur I with five to seven prolateral spines and femur II with two to five prolateral spines; tibia I–II usually with more than seven pairs of ventral spines (usually unpaired); metatarsus I usually with four pairs of ventral spines, metatarsus II usually with four proventral spines and three retroventral spines. Abdomen oval, without distinct chevron stripes in dorsal view, with small and thin dorsal scutum in male, absent in female. Male palp: femoral apophysis well developed; tibia with one retrolateral apophysis; bulb oval, narrower than cymbium; embolus long, and curved and hook-shaped; conductor absent. Female epigyne: epigynal plate with distinct median septum, copulatory openings small, situated medially on plate; copulatory ducts nearly globular-shaped, glandular appendages digitiform or mastoid-shaped; spermathecae round.