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Copépodes planctoniques marins
Bestiolina similis  Sewell, 1914   (F,M)
Taxonomy
Ordre Calanoida
Superfamille Calanoidea
Famille Paracalanidae

Synonymie

Acrocalanus similis Sewell, 1914 a (p.211, figs.F,M) ; Wellershaus, 1969 (p.253, figs.F, M); Silas, 1972 (p.646); Sreekumaran Nair & al., 1981 (p.493, fig.2cont.), Gajbhiye & al., 1991 (p.188); Gouda & Panigrahy, 1995 (p.206);
Bestiola similis : Andronov, 1972 a (p.292); Greenwood, 1976 (p.20, figs.F); Kimmerer & al., 1985 (p.426); Kimmerer & McKinnon, 1985 (p.149); Madhupratap & Haridas, 1986 (p.105, tab.1); Nishida, 1989 (p.173, table 1, 2, 3, dorsal hump); Othman & al., 1990 (p.561, 563, Table 1); McKinnon, 1991 (p.471); Ramaiah & al., 1996 (p.2); Ramaiah & Nair, 1997 (tab.1); Madhu & al., 2007 (p.54, Table 4, abundance vs monsoon);
?Bestiolina sp. Sterza & Fernades, 2006 (p.95, Table 1, occurrence, Rem.:p.103)

Références

Connell, 1981 (p.498); Bradford-Grieve, 1994 (p.51, figs.F,M); Chihara & Murano, 1997 (p.846, Pl.133: F,M); Ali, Al-Yamani & Prusova, 2007 (p.203: Tab.II, Rem.); Mercier & al., 2013 (p.760, neural ultrastructure)

Figures

Planche 1 issued from : J.G. Greenwood in Proc. R. Soc. Qd, 1976, 87. [p.21, Fig.7]. As Bestiola similis.
Female (from Moreton Bay, E Australia): a, head (lateral); f, P5; g, P1; h, P2; i, endopod of P3; j, endopod of P4.
Male: b, head (lateral); c, posterior metasomal border with P5 in situ and urosome (lateral left side); d, P5; e, terminal region of P5.
Nota: Tis species differs from B. inermis in absence of spine-rows on posterior exopodal segments 1 and 2 of P2 to P4; absence of spinules on 5th thoracic segment,; smaller size and having longer rostral filaments. .
Planche 2 Issued from : R.B.S. Sewell in Spolia Zeylanica, 1914, 9. [Pl.XVII, Figs.3-5]. As Acrocalanus similis.
Female (from Gulf of Mannar): 3, P3; 4, P4.

Male: 5, P5.
Planche 3 issued from : S.Y. Moon, W. Lee & H.Y. Soh in Proc. Biol. Soc. Washington, 2010, 123 (1). [p.44, Table 1].
Presence and number of spinules on the anterior surface of the exopods and endopods of swimming legs 2 - 4 from (Sewell, 1914).
These characteristics were taken from Ali & al. (2007).
Planche 4 Issued from : S. Wellershaus in Veröff. Inst. Meeresforsch. Bremerh., 1969, 11 (2). [p.252, Figs.10-20]. As Acrocalanus similis.
Female (from Cochin Backwater, S. India): 10, habitus (lateral; spot on 5th thoracic segment indicates red pigmentation); 11, forehead (lateral); 13, last thoracic segments and urosome (lateral right side); 15, left P4 and P5 (anterior); 16, A1; 19, Mxp; 20, Md.

Male: 12, forehead (anterior and lateral); 14, 3th to 5th thoracic segments and urosome (lateral right side); 17, A1; 18, urosome (dorsal; somewhat crushed).
Scale : single line = 0.1 mm ; double line = 0.05 mm.

Nota female:
- Ratio thorax : abdomen = 3.3-3.5 (for 7 animals).
- A1 reaches the caudal rami (or is even longer); segments 1-2 to 7 without spinules.
- P5 rudimentary.

Nota male: Ratio thorax : abdomen = 2.5-2.6;
- Head of many males bears a transparent swelling above A2.
- A1 symmetrical.

Remarks: Some animals bear a red patch in thoracic segment 5.
Planche 5 Issued from : S. Wellershaus in Veröff. Inst. Meeresforsch. Bremerh., 1969, 11 (2). [p.253]. As Acrocalanus similis.
Proportions of the abdominal segments in female (for 7 animals) and male (for 2 animals).

Références complémentaires

Ohtsuka & al., 1995 (p.159); McKinnon & Klumpp, 1998 (tab.1); Lenz & al., 2000 (p.338); McKinnon & Duggan, 2001 (p.121); Ueda, 2001 (p.96, occurrence); Greenwood & al., 2002 (p.17, Table 2); Rezai & al., 2004 (p.486, tab.2, 3, abundance, Rem.); Rezai & al., 2005 (p.157, Table 2: spatial & temporal variations); McKinnon & al., 2008 (p.844: Tab.1, fig.7); VanderLugt & Lenz, 2008 (p.69, production); C.-Y. Lee & al., 2009 (p.151, Tab.2); Ohtsuka & al., 2008 (p.115, Table 5); Camus & al., 2009 (p.189, feeding); Gusmao & McKinnon, 2009 (p.1101, Table I, sex ratios); Fazeli & al., 2010 (p.153, Table 1, as Bestiulina similis); Maiphae & Sa-ardrit, 2011 (p.641, Table 2, 3, as similes); Saitoh & al., 2011 (p.85, Table 4, 5); Chew & Chong, 2011 (p.127, fig.4, 5, Table 2, 3, abundance vs location); Johan & al., 2012 (p.647, Table 1, fig.2, salinity range); Johan & al., 2012 (2013) (p.1, Table 1); Gusmao & al., 2013 (p.279, Table 7, sex ratio); Cornils & Blanco-Bercial, 2013 (p.861, Table 1, molecular analysis, figs.3, 4, 5); Jungbluth & Lenz, 2013 (p.630, Table I); Nakajima & al., 2015 (p.19, Table 3: abundance); Araujo & al., 2016 (p.1, Table 3, 5, abundance, %, Rem.: p.7); Buskey & al., 2017 (p.754, myelinate fiber vs escape response); Ohtsuka & Nishida, 2017 (p.565, Table 22.1)

Distribution

Localisations

South Africa (SE), Indian Ocean, Gulf of Oman, Arabian Sea, Oman Sea, Bombay, Cochin, G. of Mannar, Burhabalanga estuary, Rushikulya estuary, Kerala, G. of Bengal, Burma, Perai River estuary (Penang), Straits of Malacca, Sangga estuary (mainly lower estuary and off shore), G. of Thailand, Malaysia (Sarawak: (Bintulu coast), Tioman Is., NW Taiwan (rare), Okinawa Island: Lagoon, Palau Is., Australia (G. of Carpentaria, North West Cape, Darwin Harbour, Shark Bay, Melbourne, Great Barrier Reef, Brisbane River estuary, Moreton Bay, Haughton River, Mouth of Ross River), N Pacif. (Hawaii, Kaneohe Bay), Brazil (Macaé, Vitoria Bay estuary, Sao Joao, Perequê-Açu, Bracui)

Data from: Cornils & Blanco-Bercial (2013): 21°26'N; 157°47'W.

Citations

N: 44

Dimensions (mm)

(82) F: 0,8-0,75; M: 0,8; (172) F: 0,72-0,81; M: 0,79-0,81; (196) F: 0,81-0,72; M: 0,8; (866) F: 0,7-1; M: 0,7-0,9; {F: 0,70-1,00; M: 0,70-0,90}

Remarques

estuaire, côtière.
Sewell (1929, p.81) considère cette espèce comme un synonyme de Acrocalanus inermis (= Bestiolina inermis), mais n’est pas suivi par Greenwood (1976) qui en souligne les différences.

Voir aussi les remarques en anglais
Dernière mise à jour : 22/10/2025