Prodoroixys Kim & Boxshall 2020, gen. nov.

• Main Authors: Kim, Il-Hoi, Boxshall, Geoff A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Ascidiacea; Enterogona; Didemnidae; Prodoroixys; Antarc*; Antarctica
• Online Access: https://doi.org/10.5281/zenodo.5699913; http://treatment.plazi.org/id/03C487CBEEA83BCFFCEFFC57FD16FD07

Prodoroixys gen. nov. Diagnosis. Body form as in Doroixys , stout, moderately inflated. Dorsal cephalic shield with or without posterolateralhorn-likeprocesses.Metasomeunsegmented or indistinctly segmented; fifth pedigeroussomite fused with fourth. Freeurosome 5-segmented. Caudalramus with 6 setae. Rostrum well-developed. Antennule 9- segmented; first segment armed with 2 setae. Antenna 4-segmented with 2-segmented endopod. Mandible with broadened medial margin of coxal gnathobase bearing 5 or 6 teeth; exopodwith 5 setae; endopodwith 1 seta on first segment and 5 to 7 setae on second. Maxillule with 9 or 10 setae on arthrite, 1 each on coxal endite and epipodite, 2 on basis, 4 onexopodand 3 on endopod. Maxilla 5-segmented; syncoxawith 3, 1, 2, and 3 setae on first to fourth endites, respectively; basis with claw plus 2 setae; endopod 3-segmentedwith 1, 1, and 3 (or 4) setae on first to third segments, respectively. Maxilliped unsegmented, armed with more than 6 setae. Legs 1–3 with 3-segmented rami. Leg 4 with 3-segmented exopod and 2- or 3-segmented endopod. Leg 1 basiswith inner distal spine. First and second segments of exopod and endopod of legs 1 and 2 with inner setae. First endopodal segment of leg 3 also with inner seta. Leg 5 rudimentary. Type species . Prodoroixys antarctica gen. et sp. nov. by original designation. Other included species . Prodoroixys bathybia gen. etsp. nov. [table omitted] Etymology . The name of the new genus is derived from pro (=”before” in Greek) andthegenericname Doroixys , and alludes to the relatively primitive character states exhibited by the new genus in comparison with Doroixys . Gender feminine. Remarks . The new genus is readily separated from Doroixys and Loboixys by the more plesiomorphic state of the armature of the oral appendages. It has 2 setae on the basis of themaxillule (only 1 in Doroixys and Loboixys ), a 3-segmented endopod on the maxilla (2-segmented in Doroixys and 1- or 2-segmented in Loboixys ), and an inner seta on the first and second segments of the ...