Archaeohuysia, Gómez, 2021

Gómez, Samuel, 2021, On some deep-sea Stenheliinae from the Gulf of California and the west coast of the Baja California Peninsula (Mexico): the genus Delavalia Brady, 1869 and proposal of Archaeohuysia gen. nov. and Diarthropodella gen. nov. (Copepoda Harpacticoida: Miraciidae), Zootaxa 5051 (1), pp. 171-235 : 205

Genus Archaeohuysia gen. nov urn:lsid:zoobank.org:act:F020C32F-50CB-4900-B840-A1DD3B494A2F

Type and only species. Archaeohuysia huysi gen. et sp. nov.

Etymology. The prefix from the Greek ἀρχαῖΟΣ, arkhaîos, primitive, makes reference to the primitive shape of the P1 ENP. The suffix is taken from Dr. Rony Huys’ family name, to whom the species is dedicated for his effort to edit this special volume dedicated to Prof. J. B. J. Wells. Gender masculine.

Diagnosis (based on the female only). Stenheliinae . Rostrum discrete, bifid, without dorsal pore, without spinular ornamentation. Antennule eight-segmented; all segments smooth, except for proximal spinular row on first segment, the latter without pore; all setae smooth except for pinnate seta on first segment. Antenna with allobasis; free endopodal segment with two spines and two setae laterally, and seven distal elements, of which outer distalmost fused basally to slender seta; exopod three-segmented, first and second segments with one distal seta each, third segment with one proximal and three apical setae. Mandible with elongate basis bearing three subdistal outer setae; exopod one-segmented, with three lateral and three apical setae; endopod recurved, twisted over exopod, with three lateral setae, and five distal elements. Maxillulary basis with two endites; proximal endite with four, distal endite with three slender setae; exopod and endopod fused basally, separated from basis, one-segmented; endopod with four, exopod with two setae. Maxilla with three endites; proximal endite bilobed, each lobe with two setae; middle and distal endites elongate, with three elements each; endopod one-segmented, with six slender setae. Maxilliped subchelate, not or weakly prehensile; syncoxa with one bare and two spinulose elements; basis with two setae; endopod one-segmented, with hyaline distal part, with two seta-like elements. P1 with intercoxal sclerite transversely elongated and without surface ornamentation; with three-segmented exopod and two-segmented endopod, the former longer; EXP2 and EXP3 imperfectly subdivided; ENP1 with semicircular row of modified outer spinules distally; ENP2 with one anterior medial small element and three strong setae; armature formula of exopod/endopod 0,1,022/1,121. P2–P4 with three-segmented rami; intercoxal sclerites with pointed distal processes, without spinular ornamentation; basis with acute pointed projection at inner distal corner and between rami; ENP1 with inner stiff element, of P4 visibly longer; armature formula of exopod/endopod (P2) 1,1,223/1,2,121, (P3) 1,1,323/1,1,321, (P4) 1,1,323/1,1,221. P5 with endopodal lobe poorly-developed, with five setae, of which outermost and adjacent seta set close together; all setae naked; exopod with six setae, of which medial shortest. Caudal rami elongate, about 3 times as long as wide, with seven elements, of which seta I spine-like.