Notoixys 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; Notoixys; Antarc*; Antarctic; Southern Ocean
• Online Access: https://doi.org/10.5281/zenodo.5730232; http://treatment.plazi.org/id/03C487CBEEAC3BCAFCEFFB05FA5DF8C7

Notoixys gen. nov. Diagnosis . Body inflated, usually with unsegmented, globular metasome. Dorsal cephalic shield expanded ventrolaterally, with paired horn-like processes posterolaterally. Fifth pedigerous somitecompletely fused with fourth. Free urosome 5-segmented. Caudal setae small or absent. Rostrum well-developed.Antennule 7- to 10-segmented. Antenna 4-segmentedwith 2-segmented endopod bearingsmallterminal claw. Mandiblewith coxal gnathobase bearing narrow medial cutting margin; armed with 1 seta on basis, 5 setae on exopod, 1 seta on first endopodal segment, and 4 to 7 setaeon second. Maxillule armedwith 5 or 6 setaeon arthrite, 1 setaon epipodite, 1 or 2 setaeon basis, 4 setaeon exopod, and 3 setaeon endopod; coxal endite absent. Maxilla 5-segmented with 3-segmented endopod; syncoxa bearing 4 endites; basis with 3 setae (or 2 setae plus claw). Maxilliped as unsegmented lobe bearing 3 to 5 setae. Legs 1–4 biramous; segmentation of rami frequently incompletely expressed. Inner coxal seta present at least in leg 1. Leg 1 with inner distal element on basis; exopod 3-segmented, with inner seta on first and second segments, and 7 or 8 setae on third segment. Leg 2 exopod 3-segmented, with inner seta on first and second segments. Exopods of legs 3 and 4 usually with inner seta on first or second, or both segments. Endopods of legs 2–4 usually with inner seta on first or second, or both segments. Leg 5 rudimentary or absent. Type species . Notoixys heardensis gen. et sp. nov. by original designation. Other included species . Notoixys hirsuta gen. et sp. nov. , N. ovata gen. et sp. nov. and Notoixys planiceps gen. etsp. nov. Etymology . The generic name is derived from the combination of noto (=”south” in Greek) and - ixys , the ending of several existing genera of the Notodelphyidae. The name alludes to the zoogeographic distribution of the new genus in the Antarctic or Southern Ocean. Remarks . Notoixys gen. nov. can be distinguished from Loboixys and Doroixys by the more complex state of the armature on the ...