Diarthropodella, 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 : 213

Genus Diarthropodella gen. nov urn:lsid:zoobank.org:act:7E6661DE-FCFC-4C75-9B61-385F9C8109C2

Type species. Diarthropodella prima gen. et sp. nov.

Other species. Diarthropodella secunda sp. nov.

Etymology. The genus name is derived from the Ancient Greek δίΣ, dís, twice, ἄρθρΟΝ, árthron, joint, ποδός podós, foot, and the Latin diminitive suffix – ella, and makes reference to the small two-segmented exopod of P1.

Diagnosis. Stenheliinae . Rostrum discrete, bifid, without dorsal pore, without spinular ornamentation. Female and male antennule eight-segmented, male antennule not sexually dimorphic.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 onesegmented, with three lateral and three apical setae; endopod recurved, twisted over exopod; with three lateral setae, and four distal elements. Maxillulary exopod and endopod fused basally, separated from basis, one-segmented; endopod with four, exopod with two setae. Maxilla with three endites; proximal endite bilobed, proximal lobe with one, distal lobe with two setae; middle and distal endites with three elements each; Endopod one-segmented, with six setae. Maxilliped subchelate; syncoxa with one bare and two spinulose elements; basis with two setae; endopod onesegmented, with claw-like element and one accompanying seta. P1 with intercoxal sclerite transversely elongated and without surface ornamentation; exopod two-segmented, shorter than endopod; EXP1 without inner armature; EXP2 with five elements; endopod two segmented; ENP1 shorter than ENP2 , the former with one inner seta, the latter with one inner and three apical elements; armature formula of exopod/endopod 0,122 / 1,121. P2–P4 with three-segmented rami; intercoxal sclerites without surface ornamentation, with pointed distal processes; basis with acute pointed projection between rami and at inner distal corner; ENP1 with inner element, that 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 three or four setae; exopod with four or five setae. Caudal rami elongate, about four times as long as wide, with seven elements, of which seta I very small. Sexual dimorphism expressed in the genital somite and third urosomite separated, P5 and P6. Baseoendopods of the male P5 fused medially, endopodal lobes with one (or two?) setae; exopod small, with three setae. Both male P6 fused forming a continuous plate fused to somite, each leg with three setae .