List species and varieties by family
Tortanidae Sars, 1902 ( Diaptomoidea )
(1) Tortanus Giesbrecht,1898; emend. Ohtsuka & Reid, 1998
Rem.: Type: Corynura gracilis Brady, 1883. 5 S.G.: Acutanus , Atortus, Boreotortanus, Eutortanus , Tortanus . Total: 47 spp. + 1 undet.

Diagnosis from Bradford-Grieve (1999 b, p.228):
- 1 median eye.
- No rostrum; a semicircular plate, thickly covered with short bristles, lies anterior to the labrum.
- Head and pediger segment 1 separate, pediger segments 4 and 5 fused or separate.
- Posterior corners of pediger segment 5 with rounded or pointed extremities which are small or absent in the male.
- Urosomal segments 2- or 3-segmented in female
- Genital segment female without seminal receptacles.
- Urosome 5-segmented in male, often asymmetrical, both because of asymmetry in individual segments and as a result of curvature along the longitudinal axis; urosome asymmetry less frequent in males.
- Female genital segment often asymmetrical, bearing a common genital aperture located medially on ventral surface, copulatory pore contained within median gemital aperture.
- Caudal rami sometimes asymmetrical, one larger than the other, often fused to the anal segmebt, with 6 setae.
- A1 12- to 15-segmented, prehensile on the right side in the male, its middle part widened and sometimes equipped with a denticulate plate.
- A2 coxa and basis separate, endopod and basis often fused; with exopod indistinctly 3-segmented, typically with an unarmed 1st segment, a long middle segment with up to 3 setae, and a short segment with 2 setae; endopod 2-segmented with 6 terminal setae.
- Md with an elongate palp; unarmed basis; endopod 2-segmented with 0 and 6 setae; exopod indistinctly 1- 4-segmented with 5 setae in total.
- Mx1 with much reduced number of lobes (inner lobe 1 one other the only ones present); inner lobe 1 with up to 13 spines and setae, the distal segment elongate bearing 3 powerful claw-like setae around the apex, and up to 7 short setae subapically.
- Mx2 with lobes 1-3 reduced; the remaining lobes bear claw-like setae.
- Mxp reduced with 2 long spines on the 1st segment; the distal part pof the limb bearing 3 or 4 setae on the inner margin and 1 on the outer margin of the distal segment.
- Swimming legs with3-segmented exopods; endopod of P1 2 or 3-segmented; P2-P4 with 2- segmented endopodss.
- Female P5 simple, uniramous, 2-3-segmented; coxa and coupler fused; basis with an outer seta; free exopodal segment typically with 1 outer margin spine and 3 spinous processes arranged around the margins; exopod segment sometimes in the form of a curved tapering process.
- Male P5 asymmetrical, uniramous; right leg 3-segmentd, 1st segment unarmed, 2nd segment often expanded into a medial or distal lamellate process armed with up to 3 setae, 3rd segment forming a subchela typically curved and armed with 3 or 4 small setae; left leg 4-segmented, 1st segment unarmed, 2nd and 3rd segments elongate, each with an inner and outer seta, 4th segment curved, typically armed with 2 setae on the inner margin, 1 apical seta and 2 on the outer margin; the inner seta on the 3rd segment often carried on a slender process.

Diagnosis from Mulyadi (2004, p.164):
- Cephalon without lateral hook.
- Rostrum absent, horse shoe-shaped plate fringe with hairs anterior to upper lip.
- Eye large, without lenses.
- Cephalon and pediger somite 1 separated, pediger somites 4 and 5 fused or separated.
- Corners of last thoracic somite pointed and sometimes asymmetrical in female, rounded in male.
- Urosome 2 or 3 somites and usually asymmetrical in female; 5 somites in male.
- Caudal rami usually very asymmetrical in female, less so in male.
- A1 17-segmented; male right A1 prehensile, thickened at middle.
- Endopod of A2 little longer than exopod.
- Basis of Md long; outermost tooth of gnathobase large and well separated from other teeth.
- Mx1 reduced to basal segment bearing short broad proximal lobe and long narrow distal lobe, the latter with 2 long and 1 shorter apical setae.
- Mx2 with much reduced proximal lobe.
- Mxp with well-developed basal segment armed with strong setae; endopod much reduced.
- P1-P4 with 3 exopodal segment, 2 or 3 endopodal segments in P1, 2 endopodal segments in P2-P4.
- P5 uniramous in both sexes, 2-3-segmented and sometimes asymmetrical in female; right P5 male forming a chela.

Key to subgenera from Ohtsuka & Reid (1998, p.775) :
1 – Right caudal ramus of female bearing large acute outer process ; right caudal seta II of male much thicker and longer than left ; 2 nd endopod segment of leg P4 bearing 7 setae …….. Tortanus (Boreotortanus) Ohtsuka & Reid, 1998.
1’ – Caudal rami of both sexes not as above ; 2 nd endopod segment of leg P4 with 6 setae ……… 2.
2 – Mxp syncoxa beraing 5 setae ……. 3.
2’ - Mxp syncoxa bearing only 2 setae …… 4.
3 – In both sexes, dorsal terminal triangular process present on both caudal rami ; prosomal corners of female not produced ; caudal rami of male exyremely slender, as long as or longer than urosomites compined, 2 nd endopod segments of legs P2 and P3 each bearing 7 setae …….. T. (Tortanus) Giesbrecht, 1898.
3’ – In both sexes, dorsal terminal triangular process absent on both caudal rami ; prosomal corners of female produced posteriorly into winglike process ; caudal rami of male shorter than urosomites compbined ; 2 nd endopod segments of legs P2 and P3 each bearing 8 setae ……T. (Eutortanus) Smirnov, 1935.
4 – In both sexes, pedigers 4 and 5 separate ; female P5 with with 1-segmented exopodbearing either 4 spines or 3 spines plus 1 process ; in right P5 of male, exopod arising proximally from basis …….. T. (acutanus) Ohtsuka, 1992.
4’ – In both sexes, pedigers 4 and 5 fused ; female exopod of P5 either reduced or 1-segmented, tapering distally with spines/processes ; in right P5 of male, exopod arising distally from basis …….. T. (Atortus) Ohtsuka, 1992.

[1] Tortanus (Atortus) ampliramus  Ohtsuka, El-Sherbiny & Ueda, 2000   (F,M)    [Figs]

[2] Tortanus (Atortus) andamanensis  Nishida, Anandavelu & Padmavati, 2015   (F,M)    [Figs]

[3] Tortanus (Acutanus) angularis  Ohtsuka, 1992   (F,M)    [Figs]

[4] Tortanus (Tortanus) barbatus  (Brady, 1883)   (F,M)    [Figs]

[5] Tortanus (Atortus) bilobus  Mulyadi, Nishida & Ohtsuka, 2017   (F,M)    [Figs]

[6] Tortanus (Atortus) bonjol  Othman, 1987   (F,M)    [Figs]

[7] Tortanus (Atortus) bowmani  Othman, 1987   (F,M)    [Figs]

[8] Tortanus (Atortus) brevipes  A. Scott, 1909   (F)    [Figs]

Tortanus bumpusi    Wheeler, 1901   (F,M)
Syn.: Corynura bumpusii Wheeler, 1901 (p.184, figs.F,M)
Rem.: Cf. Tortanus discaudatus

[9] Tortanus (Atortus) capensis  Grindley, 1978   (F,M)    [Figs]

[10] Tortanus (Acutanus) compernis  Gonzalez & Bowman, 1965   (F,M)    [Figs]

Tortanus denticulatus    Giesbrecht, 1889   (F)
Syn.: Corynura denticulata Giesbrecht,1899; 1892 (p.525, 772, figs.F)
Ref.: Giesbrecht & Schmeil, 1898 (p.158); Sewell, 1912 (p.377, Rem.); Früchtl, 1924 b (p.15, Rem.); Greenwood, 1978 (p.18, Rem.); Hulsemann, 1988 (p.656, Rem.)
Loc: Mer Rouge
Rem.: Cf. Tortanus barbatus

Tortanus denticulatus    Shen & Lee, 1963   (F,M)
Ref.: Shen & Lee, 1963 (p.595, figs.F,M); Bowman, 1971 a (p.521); Hulsemann, 1988 a (p.656, Rem.)
Loc: Chine
Rem.: Cf. Tortanus sheni

[11] Tortanus (Eutortanus) derjugini  Smirnov, 1935   (F,M)    [Figs]

[12] Tortanus (Eutortanus) dextrilobatus  Chen & Zhang, 1965   (F,M)    [Figs]

[13] Tortanus (Atortus) digitalis  Ohtsuka & Kimoto, 1989   (F,M)    [Figs]

[14] Tortanus (Boreotortanus) discaudatus  (Thompson & Scott, 1897)   (F,M)    [Figs]

[15] Tortanus (Acutanus) ecornatus  Ohtsuka & Reid, 1998   (F,M)    [Figs]

[16] Tortanus (Atortus) erabuensis  Ohtsuka, Fukuura, Go, 1987   (F,M)    [Figs]

[17] Tortanus (Tortanus) forcipatus  Giesbrecht, 1889   (F,M)    [Figs]

[18] Tortanus (Atortus) giesbrechti  Jones & Park, 1968   (F,M)    [Figs]

[19] Tortanus (Tortanus) gracilis  (Brady, 1883)   (F,M)    [Figs]

[20] Tortanus (Atortus) indonesiensis  Mulyadi, Nishida & Ohtsuka, 2017   (M)    [Figs]

[21] Tortanus (Atortus) insularis  Ohtsuka & Conway, 2003   (F,M)    [Figs]

[22] Tortanus (Eutortanus) komachi  Itoh, Ohtsuka & Sato, 2001   (F,M)    [Figs]

[23] Tortanus (Atortus) longipes  Brodsky, 1948   (F,M)    [Figs]

[24] Tortanus (Atortus) lophus  Bowman, 1971   (F,M)    [Figs]

[25] Tortanus (Atortus) lukmani  Mulyadi, Nishida & Ohtsuka, 2017   (M)    [Figs]

[26] Tortanus (Atortus) manadoensis  Mulyadi, Nishida & Ohtsuka, 2017   (M)    [Figs]

[27] Tortanus (Atortus) magnonyx  Ohtsuka & Conway, 2005   (F,M)    [Figs]

[28] Tortanus (Atortus) minicoyensis  Francis & Bijoy Nandan, 2019   (F,M)    [Figs]

[29] Tortanus (Atortus) murrayi  A. Scott, 1909   (F,M)    [Figs]

[30] Tortanus (Atortus) nishidai  Ohtsuka, El-Sherbiny & Ueda, 2000   (M)    [Figs]

[31] Tortanus (Atortus) omorii  Mulyadi, Nishida & Ohtsuka, 2017   (M)    [Figs]

[32] Tortanus (Atortus) processus  Mulyadi, Nishida & Ohtsuka, 2017   (M)    [Figs]

[33] Tortanus (Atortus) recticaudus  (Giesbrecht, 1889)   (F,M)    [Figs]

[34] Tortanus (Atortus) rubidus  Tanaka, 1965   (F,M)    [Figs]

[35] Tortanus (Atortus) ryukyuensis  Ohtsuka & Kimoto, 1989   (F,M)    [Figs]

[36] Tortanus (Atortus) scaphus  Bowman, 1971   (F,M)    [Figs]

Tortanus (Atortus) scaphus variant       
Ref.: McKinnon, 1993 (p.1, figs.F, Rem.)
Loc: (860) F: 2,62; { F: 2,6

[37] Tortanus (Acutanus) setacaudatus  Williams, 1906   (F,M)    [Figs]

[38] Tortanus (Eutortanus) sheni  Hulsemann, 1988   (F,M)    [Figs]

[39] Tortanus (Atortus) sigmoides  Nishida, Anandavelu & Padmavati, 2015   (M)    [Figs]

[40] Tortanus (Atortus) sinicus  Chen, 1983   (F,M)    [Figs]

[41] Tortanus (Eutortanus) spinicaudatus  Shen & Bai, 1956   (F,M)    [Figs]

[42] Tortanus (Atortus) sulawesiensis  Mulyadi, Nishida & Ohtsuka, 2017   (F,M)    [Figs]

[43] Tortanus (Atortus) taiwanicus  Chen & Hwang, 1999   (F,M)    [Figs]

[44] Tortanus (Eutortanus) terminalis  Ohtsuka & Reid, 1998   (F,M)    [Figs]

[45] Tortanus (Atortus) tropicus  Sewell, 1932   (F,M)    [Figs]

[46] Tortanus (Atortus) tumidus  Chen, Hwang & Yin, 2004   (F,M)    [Figs]

[47] Tortanus (Eutortanus) vermiculus  Shen, 1955   (F,M)    [Figs]

Tortanus (Atotus) sp.    Ohtsuka, 1992   
Ref.: Ohtsuka, 1992 b (p.265, nom. nud.)
Loc: Sud Yemen

[48] Tortanus (Atortus) vietnamicus  Nishida & Cho, 2005   (F,M)    [Figs]

[49] Tortanus sp.  Mulyadi, 2004   (F)    [Figs]

 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 March 19, 2024]

© copyright 2005-2024 Sorbonne University, CNRS

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

 

Version française
English version

 

Search

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