Parastenhelia willemvervoorti, Huys, Rony & Mu, Fanghong, 2021

Huys, Rony & Mu, Fanghong, 2021, Johnwellsia, a new intertidal genus of Parastenheliidae (Copepoda, Harpacticoida) from the Taiwan Strait, China, including a review of the family and key to genera, Zootaxa 5051 (1), pp. 236-318 : 255

Parastenhelia willemvervoorti sp. nov.

urn:lsid:zoobank.org:act:D4B6BA49-5E4C-4021-A57E-B6F4B35CA973

Original description. Vervoort (1964): 181, 184–188; Figs. 66a–b (♂ – from locality 590), 68a–c (♀ – from locality 589), 69a–f (♂ – from locality 590) [as Parastenhelia spinosa ].

Type material. The dissected male specimen illustrated by Vervoort (1964: 181, 187) in his figures 66 (a–b) and 69 (a–f) and collected on 16 October 1953 is here designated as the holotype of P. willemvervoorti sp. nov. ( ICZN Arts 16.4 and 72.5.6). The species can be differentiated by the characters listed in the diagnosis below and those mentioned and illustrated in Vervoort (1964) ( ICZN Art. 13.1).

Type locality. Federated States of Micronesia, Caroline Islands, Ifalik (Ifaluk) Atoll; seaward reef about middle of Falarik. Vervoort (1964) collected males from two different stations (589 and 590). The male holotype came from station 590 (sand sample taken about 24 m from reef margin) .

Differential diagnosis. Parastenhelia . Body length 290–470 μm in ♀, 270–650 μm in ♂. Rostrum as long as antennulary segments 1–2 combined. Antennule 8-segmented in ♀; haplocer in ♂ but segmentation unconfirmed, with three segments distal to geniculation. Antenna with 2-segmented exopod bearing two setae on exp-1 and one lateral and three apical elements on exp-2. P1 exopod about 0.6 times length of endopod; exp-2 not elongate, slightly longer than exp-3. P1 enp-1 about 1.5 times length of exopod. P3–P4 exp-1 without inner seta, exp-3 with three inner setae. P2 endopod ♂ 2-segmented; enp-2 elongate, reaching apex of exopod, with additional inner seta [1.221 vs 1.1. 121 in ♀]. P3 endopod ♂ 3-segmented, with apophysis on enp-3, armature pattern [1.1.02 + apo]; P4 endopod ♂ 3-segmented, with only one inner seta on enp-3 [1.1.121 vs 1.1. 221 in ♀]. Armature of P1–P4 – see Table 1. P 5 ♀ with elongate exopod (about 2.5 times as long as wide), with six elements; armature of endopodal lobe unknown. P 5 ♂ 2-segmented, with one outer seta on exp-1 and six elements on exp-2; endopodal lobe with two elements. P 6 ♂ with three setae. Anal operculum smooth. Caudal ramus seta IV– V ♀ not swollen at base .

Etymology. The species is named after the late Prof. Willem Vervoort (12 June 1917 – 18 August 2010), eminent copepodologist, who discovered this species.