Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Acartiidae ( Family )
            Acartia ( Genus )
                Acanthacartia ( Sub-Genus )
Acartia (Acanthacartia) fossae  Gurney, 1927   (F,M)
Syn.: ? Acartia hamata Mori, 1937 (1964) (p.104, figs.F); 1942 (p., Figs.M); Kos, 1972 (Vol. I, figs. F, M, Rem.); Peterson, 1975 (p.28, Rem., abundance); Ueda & al., 1983 (p.165, table 1, 2, 4, swarms); Park & Choi, 1997 (Appendix); Kazmi, 2004 (p.228, Rem.: p.232); Jungbluth & Lenz, 2013 (p.630, Table I);
A. ransoni : Vaissière, 1954 (p.358)
Gurney, 1927 (p.156, figs.F,M, Rem.); Grice, 1964 (p.262, figs.F,M, Rem.); Lakkis, 1984 (p.298, figs.F,M, Rem.); Nishida, 1985 (p.136, figs.F,M, Rem.); Dussart, 1989 (p.14, 116: figs.F,M); Chihara & Murano, 1997 (p.670, Pl.18,19: F,M); Bradford-Grieve, 1999 (N°181, p.5, figs.F,M); Barthélémy, 1999 (p.858, 864, 869: Rem., figs.F); 1999 a (p.9, Fig.24, A-F); Conway & al., 2003 (p.102, figs.F,M, Rem.); Vives & Shmeleva, 2007 (p.431, figs.F,M, Rem.); Al-Yamani & al., 2011 (p.82, figs.F,M)
Species Acartia (Acanthacartia) fossae - Plate 1 of morphological figuresissued from : G.D. Grice in Crustaceana, 1964, 6 (4). [p.260, Figs.38-40].
Female: 38, P5.

Male: 39, P5; 40, idem (other side).

Species Acartia (Acanthacartia) fossae - Plate 2 of morphological figuresissued from : S. Nishida in Publ. Seto Mar. Biol. Lab., 1985, 30 (1/3). [p.135, Fig.6, a-d].
Female (from Kabira Bay, Ishigaki Is.): a, 5th thoracic segment and urosome (dorsal); b, P5.

Male: c, 5th thoracic segment and urosome (dorsal); d, P5.

Species Acartia (Acanthacartia) fossae - Plate 3 of morphological figuresissued from : T. Mori in The pelagic Copepoda from the neighbouring waters of Japan, 1937 (2nd edit., 1964). [Pl.51, Figs.1-5]. ? As Acartia hamata; (Cf. Acartia bispinosa)
Female: 1, forehead (ventral); 2, anal segment and caudal rami (dorsal); 3, P5; 4-5, habitus (lateral and dorsal, respectively).

Species Acartia (Acanthacartia) fossae - Plate 4 of morphological figuresissued from : R.-M. Bathélémy in J. Mar. Biol. Ass. U.K., 1999, 79. [p.862, Fig.5, A-C].
Scanning electon miccrograph. Female (from Tahiti): A, genital double-somite (ventral), note the fragmented genital area with lateral genital stuctures (arrows); B, idem (left lateral); C, detail of the left genital structure; note the anterior thickening (arrow) prolonged by a small cuticular flap similar to an operculum (*).
Scale bars: 0.050 mm (A, B); 0.010 mm (C).

Species Acartia (Acanthacartia) fossae - Plate 5 of morphological figuresissued from : T. Mori in Palao trop. biol. Stn Stud., 1942, 2 (3). [Pl.X, Figs.1, 2]. As Acartia hamata.
Male (from Palao Island): 1, habitus (dorsal); 2, P5 (posterior view).

Species Acartia (Acanthacartia) fossae - Plate 6 of morphological figuresIssued from : M. Chihara & M. Murano in An Illustrated Guide to Marine Plankton in Japan, 1997. [p.676, Pl. 18, fig.7 a-c].
Female: a, habitus (dorsal); b, P5; c, last thoracic segment and urosome (dorsal).

Nota: numbers show characteristics of this species to compare with A. tumida, A. steueri.

Species Acartia (Acanthacartia) fossae - Plate 7 of morphological figuresIssued from : M. Chihara & M. Murano in An Illustrated Guide to Marine Plankton in Japan, 1997. [p.677, Pl. 19, fig.7 a-d].
Male: a, habitus (dorsal); b, last thoracic segment and urosome (dorsal) c, P5.

Nota: numbers show characteristics of this species to compare with A. steueri, A. tumida.

Species Acartia (Acanthacartia) fossae - Plate 8 of morphological figuresIssued from : R. Gurney in Trans. zool. Soc. London, 1927, 22. [p.157, Fig.22].
Female (Suez Canal): A, habitus (dorsal); B, abdomen (dorsal); C, P5.

Male: D, abdomen (dorsal); E, abdomen (lateral); F, P5.

Nota female:
- Body slender.
- last thoracic somite rounnded, with a row of 4 to 5 small teeth (as in A. clausi).
- Proportion of thorax to abdomen (included furca) 84 : 24.
- Abdomen 3-segmented.
- Genital somite (= double-somite) longer than somites 2 and 3 combined, and as wide as long. This double-somite has a few small lateral hairs, but there are no dorsal spines on this or succeeding somites.
Rostral filaments present, very slender.
- A1 reaches to end of 2nd abdominal somite.
- P5P5 basal segment short and broad; length 16, breadth 12. Terminal spine rather stout and curved, smooth.

Nota male:
- Abdomen and thorax 58 : 110.
- last thoracic somite rounded and with teeth as in female.
- Abdomen 5-segmented
- 1st abdominal somite with lateral hairs.
- Abdominal somites 2, 3, 4 with posterior row of very minute denticles, dorsally.
- Furcal rami [= caudal rami] short and broad, with inner hairs.
- A1 reaches nearly to end of thorax.
- Right P5: exopod with a process on posterior side bearing a slender seta; 2nd exopodal segment produced into a large inner lobe. 2nd exopodal segment of left leg with a stout terminal spine and a curved anterior seta.

For Gurney, this species very closely resembles A. bifilosa, from which it is separated only by some minute details.

Compl. Ref.:
Sewell, 1948 (p.441); Lakkis, 1976 (p.84); Kovalev & Shmeleva, 1982 (p.85); Kimmerer & McKinnon, 1985 (p.149); M. Lefèvre, 1986 (p.33, 40); Yen & al., 1992 (p.495, tab.1, mechanorecptors); 25); Ueda, 1985 (p.1McKinnon & Ayukai, 1996 (p.595); Go & al., 1997 (tab.1, comme Acarita: lapsus calami); Mauchline, 1998 (tab.8, 65, 78); Lenz & al., 2000 (p.338); Belmonte & Potenza, 2001 (p.173); El-Serehy & al., 2001 (p.116, Table 1: abundance vs transect in Suez Canal); Zenetos & al., 2005 (p.63, Rem.: p.82, casual occurrence); McKinnon & al., 2008 (p.843: Tab.1); Zenetos & al., 2010 (p.397); Saitoh & al., 2011 (p.85, Table 4, 5); El-Serehy & al., 2013 (p.2099, Rem.: p.2101); Mojib & al., 2014 (p.2740, blue-pigment); Ohtsuka & Nishida, 2017 (p.565, Table 22.1); Abo-Taleb & Gharib, 2018 (p.139, Table 5, occurrence %).
NZ: 6 + 1 doubtful

Distribution map of Acartia (Acanthacartia) fossae by geographical zones
Species Acartia (Acanthacartia) fossae - Distribution map 3
Chart of 1996
Species Acartia (Acanthacartia) fossae - Distribution map 4Issued from : N. Mojib & al. in Molecular Ecology, 2014, 23. [p.2742, Fig.1 (part.)
Photomicrograph of the blue-pigmented copepod Acartia fossae from the Red Sea: 22.4575°N, 39.0305°E in May 2012, to analyse carotenoid-protein complexes responsible for blue coloration.
Species Acartia (Acanthacartia) fossae - Distribution map 5issued from : J. Yen, P.H. Lenz, D.V. Gassie & D.K. Hartline in J. Plankton Res., 1992, 14 (4). [p.502, Fig. 4].
Neural activity from the A1 of Acartia fossae from Kaneohe Bay, Hawaii.
Left side: spontaneous background activity. Right side: responses to a variety of mechanical stimuli (tap). All recordings are 40 ms long.
Compare with Labidocera madurae, Euchirella curticauda, Undinula vulgaris, Pleuromamma xiphias.
Species Acartia (Acanthacartia) fossae - Distribution map 6issued from : J. Yen, P.H. Lenz, D.V. Gassie & D.K. Hartline in J. Plankton Res., 1992, 14 (4). [p.504, Fig. 5B].
Neural activity recorded from the A1 of Acartia fossae (from Kaneohe Bay, Hawaii) in response to an increase in the amplitude of the stimulus displacement from 0.14 to 2.2 µm.
Form of the stimulus (output of displacement gauge) is depicted as the bottom displacement trace
Compare with Labidocera madurae.
Species Acartia (Acanthacartia) fossae - Distribution map 7issued from : J. Yen, P.H. Lenz, D.V. Gassie & D.K. Hartline in J. Plankton Res., 1992, 14 (4). [p.508, Fig. 10].
Neural activity recorded from the A1 of Acartia fossae (from Kaneohe Bay, Hawaii) in response to a single-cycle, 1.76 µm displacement of the entire A1.
(A) Initial distal bend followed by a proximal bend of all setae. (B) Proximal followed by distal bend of all setae.
The lower trace depicts the stimulus.
Medit. (Lebanon), Suez Canal, Bitter Lakes, El Kantara, Lake Timsah Hurghada, Port Taufik Red Sea, Arabian Gulf (Kuwait), Indian (Madagascar, Nosy Bé), Arabian Sea, China Seas (East China Sea), Ishigaki Is., Okinawa (Kabira Bay, Lagoon), ? Japan (Tanabe Bay ! (inYamazi, 1958), Palau Is., SE & W Australia (Melbourne, Exmouth Gulf), Pacif. (Hawaii, Kanneohe Bay, Society Is., Tuamotu, Moorea Is.: lagoon), Okinawa, S Korea.
N: 36
(91) F: ±1,06; (178) F: 1,03; M: 1-0,91; (325) F: 1,4-1,03; M: 1,3-0,91; (866) F: 1,1-1,3; M: 1,2; (991) F: 1,03-1,4; M: 0,91-1,3; (1085) F: 0,9-1,2; M: 0,9-1,1; {F: 0,90-1,40; M: 0,91-1,30}
Rem.: The presence of this species in the eastern Mediterranean is possibly a result of lessepsian migration (across the Suez Canal from the Red Sea to the Mediterranean Sea).
According to Nishida (1985, p.36) the Pacific distribution of this species and A. hamata supports the opinion of Grice (1964) that these two species may be conspecific.
Any confusion appears in the literature between A. hamata, A. fossae and A. bispinosa.
After Ueda & al., 1983 (p.167, Table 2 & p.169: Table 4, as Acartia hamata) at Shijiki Bay (Japan): (1)-Shape and diameter of swarm, (2)-depth (m), (3)- swarming position, (4)-number of samples examined, (5)-Mean % of adults, (6)- Mean % of females among adults.
(1)- ovoid (20 cm); (2)- 0.5 m; (3)- over sandy bottom among coral reefs; (4)- 1; (5)- 73.1; (6)- 83.1

See in DVP Conway & al., 2003 (version 1)
Last update : 18/11/2022
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