Species Card of Copepod
Cyclopoida ( Order )
    Oncaeidae ( Family )
        Oncaea ( Genus )
Oncaea cristata  Böttger-Schnack, 2005   (F,M)
Syn.: Oncaea sp. M Böttger-Schnack, 1988; Oncaea ovalis : Böttger-Schnack, 1990; 1995
Ref.:
Böttger-Schnack, 2005 (p.167, figs.F,M; Rem.)
Species Oncaea cristata - Plate 1 of morphological figuresissued from : R. Böttger-Schnack in Cah. Biol. Mar., 2005, 46. [p.163, Fig.2].
Female (from Red Sea): A, habitus (dorsal); B, idem (lateralleft side); C, urosome (dorsal); D, idem (lateral right side); E, A1 (comb-like seta on segment 2 figured separately, aesthetasc on segment 4 not well discerned, stippled); F, caudal ramus (dorsal); G, specimen showing expanded prosome (lateral); H, P5 (dorsal).
Nota: Proportional lengths (%) of urosomites and caudal rami 9.4:48.1:11.0:8.5:12.3:10.7. Relative lengths (%) of segments of A1 measured along posterior non-setigerous margin 8.2:14.3:49.0:11.8:5.3:11.4. Anal somite 1.3 times wider than long, slightly longer than caudal rami. caudal ramus about 1.5 times longer than wide.


Species Oncaea cristata - Plate 2 of morphological figuresissued from : R. Böttger-Schnack in Cah. Biol. Mar., 2005, 46. [p.170, Fig.3].
Female: A, A2 (lateral elements are numbered using Roman numerals, distal elements are identified by capital letters [a1, distal part of element B; a2, distal part of element III); B, labrum (anterior); C, idem (posterior); D, Md (showing individual elements); E, Mx1; F, Mx2; G, Mxp (anterior) [g1, inner margin of basis, posterior; g2, distal element on basis, posterior, showing ornamentation].


Species Oncaea cristata - Plate 3 of morphological figuresissued from : R. Böttger-Schnack in Cah. Biol. Mar., 2005, 46. [p.171, Fig.4].
Female: A, P1 (posterior); B, P2 (posterior) [b, lateral margin of exop-3, showing pore between outer subdistal and outer distal spine, spines not figured); C, P3 (posterior); D, P4 (anterior) [d, outer margin of exop-3, arrow indicating pore between outer subdistal and outer distal spine).


Species Oncaea cristata - Plate 4 of morphological figuresissued from : R. Böttger-Schnack in Cah. Biol. Mar., 2005, 46. [p.174, Fig.5].
Female (from Gulf of Aqaba): A, habitus (dorsal, showing expanded prosome and slight variation in form of genital double-somite); B, ovigerous female (lateral right side, caudal setae partly omitted) [b, egg-sac of same specimen, dorsal]; C, detached egg-sac (provisionally assigned to O. cristata), inner view, showing egg-sac string (arrowed); D, idem (outer view).


Species Oncaea cristata - Plate 5 of morphological figuresissued from : R. Böttger-Schnack in Cah. Biol. Mar., 2005, 46. [p.175, Fig.6].
Male (from Red Sea): A, habitus (dorsal); B, A1 (comb-like seta on segment 2 figured separately, arrow indicating proximal small aesthetasc); C, Mxp (anterior, proximal part of endopodal claw, showing fused pectinate spine [c, medial view, claw not figured); D, urosome (dorsal, dislocated pore on anal somite arrowed); idem (ventral); F, idem (lateral left side).
Nota: Proportional lengths (%) of urosomites and caudal rami 8.6:56.8:4.0:4.0:3.6:11.1:11.9. Relative lengths (%) of segments of A1 measured along posterior non-setigerous margin 5.4:16.2:51.4:27.0.


Species Oncaea cristata - Plate 6 of morphological figuresissued from : R. Böttger-Schnack in Cah. Biol. Mar., 2005, 46. [p.204, Table 3].
Major morphological characters separating the 2 species groups recognized within the ovalis-complex of Oncaeidae.

NZ: 1

Distribution map of Oncaea cristata by geographical zones
Loc:
Gulf of Aqaba, Red Sea
N: 1
Lg.:
(933) F: 0,42-0,46; M: 0,38-0,40; {F: 0,42-0,46; M: 0,38-0,40}
Rem.: meso-bathypelagic.
Sibling species of Oncaea crypta. For Böttger-Schnack (2005, p.176) the two siblings differ in the outer subdistal spine on P3 exop-3 reaches beyond the insertion of the outer distal spine in O. cristata, while this spine does not reach as far as the insertion of the succeeding spine in O. crypta; the outer subdistal spine on P4 exop-3 reaches beyond the marginal pore between the outer subdistal and the outer distal spine and almost as far as the insertion of the outer distal spine in O. cristata, while this spine is shorter in O. crypta, not reaching beyond the marginal pore between the two spines. Further differences between the two siblings are found.
Last update : 26/01/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2021. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed November 28, 2021]

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