taxonID	type	description	language	source
997836637C94596EA34310DB74BBB280.taxon	description	Figs 2, 3, 4, Tables 1, 2	en	Zhou, Zhiqian, Lai, Yanjiao, Lian, Xiping, Tan, Yehui, Shi, Wei (2025): A new species of the Cymbasoma longispinosum species-group (Copepoda, Monstrilloida) from the northern South China Sea. ZooKeys 1264: 95-108, DOI: 10.3897/zookeys.1264.161966
997836637C94596EA34310DB74BBB280.taxon	etymology	Etymology. The new species name is derived from the Latin noun strictūra, meaning “ constriction ” or “ narrowing, ” in reference to the characteristic constricted region of the cephalothorax in the new species. The neuter ending – um is adopted (stricturum) to agree with the neuter gender of the generic name Cymbasoma. The proposed Chinese name is “ 缩缢舟形怪水蚤 ”.	en	Zhou, Zhiqian, Lai, Yanjiao, Lian, Xiping, Tan, Yehui, Shi, Wei (2025): A new species of the Cymbasoma longispinosum species-group (Copepoda, Monstrilloida) from the northern South China Sea. ZooKeys 1264: 95-108, DOI: 10.3897/zookeys.1264.161966
997836637C94596EA34310DB74BBB280.taxon	diagnosis	Diagnosis. Female Cymbasoma having the cephalothorax distinctly constricted laterally and ventrally at the anterior 2 / 5, bearing distinctive transverse belt-like striae at the same level; two pairs of well-developed nipple-like processes on anterior dorsal surface, both bearing shallow concentric reticulation (faintly visible but discernible upon specimen tilting). Antennule 4 - segmented, short, and extending downwards, reaching 17.7 % of total body length. Swimming legs 1 – 4 and leg 5 with well-developed plumose setae. Genital double-somite bearing transverse pattern of deep cuticular ridges on proximal dorsal surface. Caudal ramus rectangular, 1.3 times as long as wide, armed with three subequally long lightly setulated caudal setae. Ovigerous spines paired, long, 1.7 times as long as body length, spines proximally fused, with bifurcation beyond distal margin of caudal rami.	en	Zhou, Zhiqian, Lai, Yanjiao, Lian, Xiping, Tan, Yehui, Shi, Wei (2025): A new species of the Cymbasoma longispinosum species-group (Copepoda, Monstrilloida) from the northern South China Sea. ZooKeys 1264: 95-108, DOI: 10.3897/zookeys.1264.161966
997836637C94596EA34310DB74BBB280.taxon	description	Description of adult female holotype. Body elongate, with numerous oil droplets inside (Fig. 2 A – C), 2.37 mm, measured from anterior end of cephalothorax to posterior margin of caudal rami, excluding antennules and caudal setae; cephalothorax (incorporating first pedigerous somite) mostly transparent, 1.70 mm long, representing 71 % of total body length; oral papilla conical, straight, strongly protruding located ventrally at anterior 1 / 5 of cephalothorax (Fig. 2 B); cephalothorax distinctly constricted at the anterior 2 / 5 in both dorsal and lateral views, bearing wide transverse belt of faint and shallow integumental striae (Figs 2 A, B, 3 A); pair of relatively large ocelli present, pigment cups moderately developed, medially conjoined, strongly pigmented; ventral cup indistinct; forehead flat, with conspicuous, medially convergent cuticular ridges between antennulary bases in dorsal view, bearing a pair of short, slender sensilla (Fig. 2 A, B); esophagus within the cephalothorax, broad; ornamentation on anterior ventral surface: rounded cuticular protuberance and paired of simple, conical nipple-like processes between antennulary bases, without adjacent striae; a pair of well-developed nipple-like processes under antennulary bases, with conspicuous striae around (Fig. 3 A, C); ornamentation on anterior dorsal surface: two pairs of well-developed nipple-like processes, both with faint and shallow concentric reticulation and three additional dorsal sensilla adjacent to these dorsal nipple-like processes (Fig. 3 B – D). Antennule short, extending downwards (Fig. 4 A, B), representing almost 18 % of total body length and 25 % of cephalothorax length; antennule 4 - segmented; relative length of segments, from proximal to distal as: 18.5; 21.5; 14.2; 45.8 = 100. In terms of the pattern described by Grygier and Ohtsuka (1995) for female monstrilloid antennulary armature, setae (Roman numerals) and spines (Arabic numerals), element 1 present on first segment; elements 2 d 1, 2 v 1 – 3, and setae IId present on second segment. Third segment with elements 3, setae IIId, and IIIv. Fourth segment long, representing 45.8 % of antennule length; segment bearing elements 4 d 1, 4 d 2, 4 v 1 – 3; elements 4 v 1 well developed, thick, and remarkably long; setae IVd, IVv, Vv, Vm, and aesthetasc 4 aes also present on same segment except Vd; element 5 spiniform, appressed in a subdistal position. Subterminal element 6 1, 6 aes present, element 6 2 absent, element b 1 – 3 branched and b 4, 5 unbranched (Fig. 4 A, B). Legs 1 – 4 (Fig. 3 H – K) all with both endopod and exopod three-segmented; pedigerous somites 2 – 4 together accounting for 19.8 % of total length in lateral view. Coxa without setae and lacking marginal rows of setae or spines. Basis not fully divided medially from coxa; basal seta of legs 3 – 4 with biserially plumose, that of leg 4 being thicker; seta on leg 3 being longest. Endopod segments 1 – 2 of legs 1 – 4 with swollen outer margins; exopod segment 3 of leg 1 and 3 bearing a small convex protuberance on outer margin. Ramus setae all biserially plumose except uniserially plumose outer seta on exopod segments 3; exopod segments 2 – 3 and endopod segments 1 – 2 with setules on outer margins (marked with an asterisk in Fig. 3 H – K); outer distal spines on exopod segments 1 and 3 shorter than segments bearing them. Seta / spine armature of swimming legs 1 – 4 as in Table 1. Leg 5 bilobed, medially conjoined; inner (endopod) lobe rounded, not reaching the half-length of outer (exopod) lobe; outer lobe armed with two long setae apically and one subapical short seta, all heavily plumose; innermost seta relatively slender, shortest, not reaching the half-length of outer two (Fig. 3 F, G). Urosome consisting of three urosomites: fifth pedigerous somite, genital double-somite and anal somite, accounting for 10.5 % of total body length, excluding caudal setae; length ratio of urosomites as: 43.3: 34.4: 22.3 (= 100); genital double-somite subquadrate, with transverse pattern of deep, transverse integumental ridges on proximal half of dorsal surface (Fig. 3 E), ridges converging together in lateral surface (Fig. 3 G); anal somite trapezoidal, smooth; Caudal rami subrectangular, 1.3 times as long as wide, armed with three subequally long lightly setulated caudal setae; ovigerous spines paired, 4.22 mm long, 1.7 times as long as body length (Fig. 2 A – C); spines basally conjoined, individual spines arise beyond posterior margin of caudal rami (see the arrow in Fig. 3 E – G); spines slender, straight at their base and along shaft, both with distally swollen sections and then tapering apically, one spine slightly shorter (Fig. 2 D, E).	en	Zhou, Zhiqian, Lai, Yanjiao, Lian, Xiping, Tan, Yehui, Shi, Wei (2025): A new species of the Cymbasoma longispinosum species-group (Copepoda, Monstrilloida) from the northern South China Sea. ZooKeys 1264: 95-108, DOI: 10.3897/zookeys.1264.161966
