Species Card of Copepod
Calanoida ( Order )
    Arietelloidea ( Superfamily )
        Augaptilidae ( Family )
            Heteroptilus ( Genus )
Heteroptilus acutilobus  (Sars, 1905)   (F,M)
Syn.: Pontoptilus acutilobus Sars,1905 c (p.21, Rem.F)
Sars, 1925 (p.326, figs.F); Farran, 1926 (p.290); Rose, 1933 a (p.237, figs.F,M); Sewell, 1947 (p.239, Redescr.F, figs.F); Owre & Foyo, 1967 (p.90, figs.F,M); Vives & Shmeleva, 2007 (p.258, figs.F,M, Rem.)
Species Heteroptilus acutilobus - Plate 1 of morphological figuresIssued from : G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.CXVII, figs.1-15].
Female: 1, habitus (dorsal); 2, idem (lateral left side); 3, forehead (lateral); 4, rostral prominence; 5, A2; 6, right Md; 7, Md (masticatory edge of the two mandible); 8, Mx1; 9, Mx2; 10, Mxp; 11, P1; 12, P3; 13, P5.

Male: 14, distal portion of left A1; 15, P5.

Species Heteroptilus acutilobus - Plate 2 of morphological figuresissued from : R.B.S. Sewell in The John Murray Expedition, 1933-34, Scientific Reports, VIII (1), 1947. [p.242, Fig.66].
Female (from G. of Aden): A, A2; B, right Md; C, Mx1; D, Mx2; E, Mxp; F, P1; G, P3; H, P5.
Nota: The proportional lengths of the cephalothorax and abdomen as 73 to 27. The proportional lengths of the various segments of the body (cephalon to caudal rami) as 391:111:74:74:85:96:44:33:18:74 = 1000. Head and 1 st pediger segment separate, 4th and 5th fused. Forehead rounded, and ventrally is produced in a downwardly directed curved prominence, the margin of which is irregularly crenated, no rostral filaments. Caudal rami are long, about twice as long as broad. A1 25-segmented, reaches to the tip of the caudal rami. In A2 the exopod is considerably longer than the endopod in the proportion of 54 to 46; exopod 8-segmented. The Md of the two sides differ; on the right side a long curved tooth projects forward the anterior margin; the 2nd basal segment bears 1 long seta on the inner margin. Mx1 agrees with Sars, and the 2nd outer lobe bears a moderately stout seta.

Compl. Ref.:
Sewell, 1948 (p.330, 505, 522, 528, 534); C.B. Wilson, 1950 (p.238); Roe, 1972 (p.277, tabl.1, tabl.2); Deevey & Brooks, 1977 (p.156, tab.2, Station "S"); Vives, 1982 (p.294); Lozano Soldevilla & al., 1988 (p.60); El Arraj & al., 2017 (p.272, table 2, seasonal composition);
NZ: 4 + 1 doubtful

Distribution map of Heteroptilus acutilobus by geographical zones
Species Heteroptilus acutilobus - Distribution map 2
Chart of 1996
? Angola-Sierra Leone (in Vervoort, 1965, p.24), Canary Is.- Azores, off Morocco-Mauritania, Caribbean, off Bermuda: Station ‘S’ (32°10’N, 64°30’W), Bay of Biscay, Indian (G. of Aden), off Peru (in C. B. Wilson, 1950)
N: 10
(1) F: 4,1; (11) F: 4,517; (38) F: 3,95; (199) M: 3,04; {F: 3,950-4,517; M: 3,040}
Rem.: meso-bathypelagic ? (0-3000 m). Overall Depth Range in Sargasso Sea: 500-1000 m (Deevey & Brooks, 1977, Station "S"). The occurrence in the Pacific must be confirmed.
Last update : 24/10/2022
    to add your remark

 Any use of this site for a publication will be mentioned with the following reference :

Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed July 20, 2024]

© copyright 2005-2024 Sorbonne University, CNRS

CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
Sorbonne Université


Version française
English version



On the WEB of CNRS


Marine Planktonic Copepods

Marine Planktonic Copepods


Imprimer Contact Accueil Plan du site Accès restreint Retour Une du Labo Imprimer Contact Plan du site Crédits Téléchargez les Plug-Ins