Eudiaptomus vulgaris
Creators: name: Podshivalina, V. N.
name: Sheveleva, N. G.
name: Semenova, A. S.
name: Mirabdullayev, I. M.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Hexanauplia
Calanoida
Diaptomidae
Eudiaptomus
Eudiaptomus vulgaris

description: Eudiaptomus vulgaris (Schmeil, 1898)
(Figs 3, 4)
Material examined. Russia, Chuvash Republic, near Malye Shikhirdany Vill., shallow water body, 55.08648°N 47.779366°E, 28 May 2020, 4 males, 3 females (E. Kuz’min leg.).
Redescription. Female (Fig. 3a). Body length 1.40–2.01 mm (n = 8). Last thoracic segment with distinct, slightly asymmetrical wings. Genital compound somite dilated in upper part, with middle-sized hyaline spines (Fig. 3b, arrowed). Rostrum with two long acuminate curved processes (Fig. 3c). Antennule extending to apices of apical caudal setae (Fig. 3a) or even longer. Edge of mandibular incision with single-vertex teeth: one ventral and seven central. Ventral tooth separated from other teeth by deep, gently sloping diastema (Fig. 3d). Rather deep diastema also present between outer ventral central tooth and six other teeth. Ventral teeth single-vertex, with wide base. Three central teeth rounded, others acute (Fig. 3d). Dorsal teeth double-vertex, acute, with narrow base. Maxilla and maxilliped with long plumose setae increasing filtration capacity; these setae situated on sympodite compounds (precoxopodite, coxopodite), basipodite and endopodite. In leg 2, endopod segment 2 with Schmeilsche lobus (Fig. 3i, arrowed). In leg 5, coxa with short thin lateral projection (Fig. 3e); exopod segment 1 rectangular, elongate, twice as long as wide (Fig. 3f); exopod segment 2 with spine at base of segment 3 (Fig. 3h) and with terminal claw bearing row of spinules on lateral and medial margins (Fig. 3h); exopod segment 3 with two apical spines, longest spine extending to three-fourths or to apex of terminal claw (Fig. 3h); endopod about two-thirds of exopod segment 1 length, with one subapical and one lateral (distal) setulae, and with one apical and one subapical relatively long unequal setae (Fig. 3f).
Male (Fig. 4a). Body length 1.40–1.50 mm (n = 5). Rostrum with two long acuminate curved processes and one lateral process (Fig. 4e). Left antennule extending to apex of caudal ramus. Right antennule with spiniform projections of variable shape and size on segments 10, 11 and 13–16; antepenultimate segment with small hyaline membrane and hook-shaped process (Fig. 4b, arrowed). In right leg 5 (Fig. 4c), coxa with large rounded well-sclerotised distolateral projection (Fig. 4d, arrowed); basis with small hyaline process in proximal part and with well-visible hyaline process in central part of medial margin (Fig. 4d); exopod segment 1 wider than long, with distinct acuminate dilation at outer distal corner and with dilation of lateral inner margin; exopod segment 2 about 1.3–1.5 times as long as wide, with strong subapically curved claw, with lateral spine inserted in middle of lateral margin; endopod one-segmented, reaching exopod segment 2, with several distal setulae. In left leg 5 (Fig. 4d), basis with large hook-shaped lateral process (Fig. 4d, arrowed); exopod two-segmented, with setulae in middle of segment 1 and in proximal part of segment 2; proximal part of exopod segment 1 wider than its distal part; exopod segment 2 with long spine (exopod 3, according to Dussart & Defaye, 2001) being slightly curved; endopod weak and long, reaching spine of exopod segment 2 (Fig. 4d).
description: Published as part of Podshivalina, V. N., Sheveleva, N. G., Semenova, A. S. & Mirabdullayev, I. M., 2022, Eudiaptomus transylvanicus and E. vulgaris (Copepoda: Calanoida: Diaptomidae): comparative morphology, distribution and ecology, pp. 42-54 in Zoosystematica Rossica 31 (1) on page 47, DOI: 10.31610/zsr/2022.31.1.42, http://zenodo.org/record/10124251