An endemic species flock of Cypridopsinae (Crustacea, Ostracoda) from the ancient Lake Malawi (Africa), with the description of a new genus and three new species Author Jacobs, Bram Royal Belgian Institute of Natural Sciences, Natural Environments, Vautierstraat 29, 1000 Brussels, Belgium & Ghent University, Biology, K. L. Ledeganckstraat 35, 9000 Ghent, Belgium Author Martens, Koen Royal Belgian Institute of Natural Sciences, Natural Environments, Vautierstraat 29, 1000 Brussels, Belgium & Ghent University, Biology, K. L. Ledeganckstraat 35, 9000 Ghent, Belgium text Zootaxa 2022 2022-02-21 5100 3 301 348 journal article 20558 10.11646/zootaxa.5100.3.1 13b81e78-dc5d-47e8-a406-f5bdf1274740 1175-5326 6201242 8D9244AB-C2E5-4F76-8C9B-30A39DD3679B Tribe Plesiocypridopsini trib. nov. Type genus: Plesiocypridopsis Rome, 1965 We here select this common genus as the type genus, in order to avoid that the entire tribe would be based on a clade which is endemic to a single lake. Genera included : see Table 2 . Differential diagnosis. Plesiocypridopsini trib. nov. is the sixth cypridopsine tribe ( Table 2 ). It can be distinguished from the five other tribes as follows: the RV overlaps the LV at least anteriorly, most commonly also along the posterior and ventral sides, by which it is distinguished from the Cypridopsini ; the A1 has a normal chaetotaxy, i.e. there are no apparent reductions in size of segments and number of setae, as in the Paranadopsini ; the distal segment of the Mx1-palp is elongated, not spatulate, as in Potamocypridini ; the A 2 in females lacks the strongly enlarge claw G2 as in the species in the tribe Zonocypridini ; the T3 has a distal pincer organ, and there are no marginal septa on the valves, which separates it from the Cyprettadopsini in which segment 4 on T3 is separate from segment 3, and marginal septa occur.