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Calanoida ( Order ) |
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Clausocalanoidea ( Superfamily ) |
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Scolecitrichidae ( Family ) |
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Mixtocalanus ( Genus ) |
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Mixtocalanus alter (Farran, 1929) (F,M) | |
| | | | | | | Syn.: | Amallophora altera (F) Farran, 1929 (p.209, 252, Descr.F, figs.F); Sewell, 1948 (p.574); non Vervoort, 1957 (p.94, figs.F); no Bradford, 1973 (p.144, figs.3a,b);
Racovitzanus antarcticus (M) : Vervoort, 1957 (p.97, figs.M); Bradford & al., 1983 (p.91, Rem.); Park, 1983 (p.172);
? Scolecithricella auropecten : Vervoort, 1951 (p.101, figs.F);
? Scolecithricella (Amallothrix) altera : Vervoort, 1965 (p.69, figs.F, Rem.);
Amallothrix altera : Roe, 1975 (p.330, figs.F, Rem.); Vives, 1982 (p.292); Lozano Soldevilla & al., 1988 (p.58);
Scolecithricella altera : Park, 1980 (p.70, figs.F, Rem.); Roe, 1984 (p.357); Shih & Young, 1995 (p.73); Schnack-Schiel & al., 2008 (p.1046: Tab.2); Park & Ferrari, 2009 (p.143, Table 4, Appendix 1, biogeography) | | | | Ref.: | | | Vyshkvartzeva, 1989 (p.7, 22, 23, Rem.); Vives & Shmeleva, 2007 (p.815, figs.F,M, Rem.) |  issued from : G.P. Farran in British Antarctic (\"Terra Nova\") Expedition, 1910. Natural History Reports. Zoology. Vol. VIII. Crustacea, 1929. [p.253, Fig.19]. As Amallophora altera. Female: a, habitus (dorsal view); b, idem (right lateral view); c, distal part of prosome and urosome (dorsal view); d, idem (right lateral view); e, Mxp.; f, first foot; g, second foot; h, fifth feet.
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 issued from : H.S.J. Roe in Bull. British Mus. (Natural History) Zool., London, 1975, 28 (7). [p.331, Fig.18]. As Amallothrix altera. Female: a, habitus (dorsal); b, rostrum (right lateral side); c, idem (ventral); d, last thoracic segment and urosome (right lateral side); e, A2; f, mandibular palp; g, Mx1; h, Mx2; i, Mxp; j, P1; k, P2; l, P3; m, P4; n, P5. Bar scale 0.1 mm unless indicated.
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 issued from : T. Park in Antarct. Res. Ser. Washington, 1980, 31 (2). [p.68, Fig.22]. As Scolecithricella altera. Female: a, habitus (dorsal); b, idem (lateral right side); c, last thoracic segments and urosome (lateral left side); d, forehead (lateral); e, rostrum (anterior); f, A2; g, Md; h, Mx1; i, distal part of Mx2; j, Mxp; k, P1 (anterior); l, P2 (posterior); m, P3 (posterior); n, P4 (posterior); o, P5 (posterior). Nota: Cephalosome and 1st metasomal segment fused, 4th and 5th partially separated by an articulation suture.Urosome about 1/4 length of prosome. A1 reaching close to distal end of prosome.
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 Issued from : W. Vervoort in Atlantide Report, 1965, 8. [p.70, Fig.14]. As Scolecithricella (Amallothrix) altera.. Female (from off Angola-Sierra Leone): a, habitus (lateral right side); b, idem (dorsal)
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 Issued from : W. Vervoort in Atlantide Report, 1965, 8. [p.71, Fig.15]. As Scolecithricella (Amallothrix) altera. Female: a, c, posterior part cephalothorax and urosome (dorsal and lateral right side, respectively); b, forehead (ventral); d, P1; e, P5.
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 Issued from : W. Vervoort in Atlantide Report, 1965, 8. [p.73, Fig.16]. As Scolecithricella (Amallothrix) altera. Female: a, Mx2; b, P2 (posterior); c, P3 (posterior); d, P4 (posterior). Nota: Mx2 with endopodite 2-segmented, carries 7 sensory appendages of two types (fairly short, thick brush-shaped appendages and slender, filiform appendages with a narrowed, curved apical portion); 1st endopodal segment with 1 brush-shaped and 2 filiform sensory appendages, 2nd endopodal segment (apical) with 1 brush-shaped and 3 filiform sensory appendages.
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 issued from : W. Vervoort in B.A.N.Z. Antarctic Reseach Expedition, Reports - Ser. B, Vol. III, 1957 [Fig.81]. As Racovitzanus antarcticus. Male (from 61°44'S, 77°59'E): a, habitus (lateral); b, posterior part cephalothorax and urosome (lateral); c, forehead (lateral).
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 issued from : W. Vervoort in B.A.N.Z. Antarctic Reseach Expedition, Reports - Ser. B, Vol. III, 1957 [Fig.82]. As Racovitzanus antarcticus. Male: a, frontal part of head (lateral); ; b, posterior part cephalothorax and urosome (dorsal); c, left P4 (posterior); d, P5 (rt = left leg; rt = right leg); e, forehead (dorsal); f, right Mx2.
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 issued from : W. Vervoort in B.A.N.Z. Antarctic Reseach Expedition, Reports - Ser. B, Vol. III, 1957 [Fig.83]. As Racovitzanus antarcticus. Male: a, right A2; b, right A1; c, left Md (manducatory plate); d, left Md (mandibular palp); e, left Mx1.
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 issued from : W. Vervoort in B.A.N.Z. Antarctic Reseach Expedition, Reports - Ser. B, Vol. III, 1957 [Fig.84]. As Racovitzanus antarcticus. Male: a, left P1 (posterior); b, right P2 (posterior); c, right P3 (posterior); d, right Mxp.
| | | | | Compl. Ref.: | | | Razouls & al., 2000 (p.343, Appendix); Kuriyama & Nishida, 2006 (p.299: Tab.II, fig. 10, vertical distribution). | | | | NZ: | 5 + 1 doubtful | | |
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Distribution map of Mixtocalanus alter by geographical zones
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| | | | | | | | |  Chart of 1996 | |
| | | | Loc: | | | Antarct. (Ross Sea, W Peninsula, ? Croker Strait, W Weddell Sea, Indian), sub-Antarct. (Indian), ? G. of Guinea, Cape Verde Is., off Morocco-Mauritania, Canary Is., off W Cape Finisterre, China Seas (South China Sea in Shih & Young, 1995; W. Zhang & al., 2010), Japan (Sagami Bay) | | | | N: | 9 | | | | Lg.: | | | (8) F: 2,2-1,98; ? (16) F: 3,00; (25) M: 2,3; (35) F: 2,76-2,67; (523) F: 2,8-2,56; (1000) F: 2,0; {F: 1,98-2,76; M: 2,30} | | | | Rem.: | Mesopelagic.
Sampling depth (Antarct., sub-Antarct.) : 100-1000 m.
For Vervoort (1965, p.72) Farran's drawing of Mxp (Farran, 1929, fig.19e) is not correct. the female found from the Gulf of Guinea (not indicated in his list from the station 139) has mutilated legs, but a comparison of the various appendages with those of the Antarctic specimens (Vervoort, 1957) leaves no doubt about its identity. This species is very closely related, if not identical with Xanthocalanus incertus Sars, 1920 (cf. Sars, 1925, p.139, Pl.38, figs.19-23; Rose, 1933, p.132, fig.122).
The report of this species in the Chinese Sea needs confirmation. W. Zhang confirms the presence of this species in the Chinese Seas (pers. comm., 2006) | | | Last update : 18/01/2021 | |
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 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 April 26, 2024] © copyright 2005-2024 Sorbonne University, CNRS
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