Aculithus Liu & Li, 2022

Aculithus Liu et al., 2022: 18

(type species: Otacilia bijiashanica Liu, 2020, by original designation).

Diagnosis. This genus is similar to Otacilia in body color and chevron stripes on abdomen, but can be distinguished by the short, slight bent embolus in male palp and small copulatory openings, large and appressed bursa in female epigyne.

Description. Small spiders. Carapace oval, yellow, with several distinct markings resembling flowing water droplets beside fovea. AME smaller than ALE, PME as large as or slightly smaller than PLE. Chelicerae with two (one long and another short) spine anteriorly. Femora I–IV with one dorsal spine, femur I with three prolateral spines, femur II with two prolateral spines; tibia I–II with six pairs of ventral spines (usually unpaired); metatarsus I with four pairs of ventral spines, metatarsus II with four proventral spines and three retroventral spines. Abdomen oval, with distinct chevron stripes posteriorly in dorsal view, with small and thin dorsal scutum anteriorly in male, lacking in female. Male palp: femoral apophysis not well developed, only swollen; tibia with one retrolateral apophysis and one dorsal tibial apophysis; bulb pyriform, wider than cymbium; embolus short, slight bent; conductor present or absent. Female epigyne: epigynal plate with median septum; copulatory openings small; copulatory ducts thick and short, connecting tubes thin and long, glandular appendages digitiform; bursa large and close to each other, spermathecae peanut-shaped.