Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Scolecitrichidae ( Family )
            Pseudoamallothrix ( Genus )
Pseudoamallothrix inornata  (Esterly, 1906)   (F,M)
Syn.: Scolecithrix inornata Esterly, 1906 a (p.67, Descr.F, figs.F); Bradford, 1973 (p.143, Rem.); Bradford & al., 1983 (p.78, Rem.); Hattori, 1991 (tab.1, Appendix);
Amallothrix inornata : Davis, 1949 (p.44, figs.F); Brodsky, 1950 (1967) (part., p.260, Descr.F,M, figs.F,M, Rem.); Minoda, 1958 (p.253, Table 2, abundance); Vaupel Klein, 1970 (p.20); Morioka, 1972 a (p.314); Marlowe & Miller, 1975 (p.839); Vives, 1982 (p.282); Yamaguchi & al., 2002 (p.1007, tab.1); Ikeda & al., 2006 (p.1791, Table 2); Homma & Yamaguchi, 2010 (p.965, Table 2); Homma & al., 2011 (p.29, Table 2, 3, abundance, feeding pattern: detritivores);
Vyshkvartzeva, 1999 (2000) (p.228, Rem.)
Species Pseudoamallothrix inornata - Plate 1 of morphological figuresissued from : C.O. Esterly in Univ. Calif. Publs Zool., 1906, 3 (5). [Pl.9, Fig.18]. As Scolecithrix inornata.
Female (from San Diego, California): 18, forehead (lateral).
Nota: Head without crest

Species Pseudoamallothrix inornata - Plate 2 of morphological figuresissued from : C.O. Esterly in Univ. Calif. Publs Zool., 1906, 3 (5). [Pl.11, Fig.37]. As Scolecithrix inornata.
Female: 37, last thoracic segment and urosome (lateral).
Nota: Last thoracic segment rounded at sides, but with an indentation above and below the middle of the posterior border. Genital segment as long as the next two; the 2nd as long as the 3rd and anal together; the anal segment is about half as long as the preceeding one; all of the abdominal segments are broader than long. Mx1 has 4 bristles on the 2nd basal, 8 on the exopod, and 7 on the endopod; 1st outer marginal lobe with 9. Mx2 has 3 vermiform and 5 penicillate sensory appendages

Species Pseudoamallothrix inornata - Plate 3 of morphological figuresissued from : C.O. Esterly in Univ. Calif. Publs Zool., 1906, 3 (5). [Pl.13, Figs.65, 73]. As Scolecithrix inornata.
Female: 65, P4; 73, P5.
Nota: P5 resemble those of S. auropecten Giesbrecht, but the bristling of Mx1 and the relative sizes of the animals are distinguishing characters.

Compl. Ref.:
in CalCOFI regional list (MDO, Nov. 2013; M. Ohman, comm. pers.)
NZ: 5

Distribution map of Pseudoamallothrix inornata by geographical zones
off Mauritania (in Vives, 1982, p.292), Japan (off Sanriku), off SE Hokkaido, Pacif. (N), Okhotsk Sea, Bering Sea (Aleutian Basin), S Aleutian Is., Station Knot, Station "P", S California (San Diego)
N: 15
(17) F: 4,3; (22) F: 4,3-3,8; M: 3,7-3,6; (59) F: 4,3-4,2; (205) F: 3,9; {F: 3,80-4,30; M: 3,60-3,70}

Prosome length (mm): (1038) F: 3.4; M: 2.6
Rem.: In vertcal haul: 0-730 m. Synonym probable of Pseudoamallothrix emarginata.
Last update : 08/02/2016
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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 18, 2024]

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Marine Planktonic Copepods

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