5338 Author Mu, Yannan The Key Laboratory of Zoological Systematics and Application, Institute of Life Science and Green Developed, Hebei University, Baoding, Hebei 071002, P. R. China & 15188605531 @ 163. com; https: // orcid. org / 0000 - 0002 - 2504 - 673 X Author Zhang, Feng The Key Laboratory of Zoological Systematics and Application, Institute of Life Science and Green Developed, Hebei University, Baoding, Hebei 071002, P. R. China text Zootaxa 2023 2023-08-25 5338 1 1 104 http://dx.doi.org/10.11646/zootaxa.5338.1.1 journal article 264147 10.11646/zootaxa.5338.1.1 e7148a02-ac1a-4172-9071-606bd1e703fc 1175­5334 8283738 CAA37212-3008-43F4-98DE-94D7A3FFD3B6 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.