Species Card of Copepod
Calanoida ( Order )
    Arietelloidea ( Superfamily )
        Augaptilidae ( Family )
            Pseudaugaptilus ( Genus )
Pseudaugaptilus orientalis  Tanaka, 1964   (F)
Tanaka, 1964 b (p.85, Descr.F, figs.F); Matthews, 1972 (p.55, Rem.); Chihara & Murano, 1997 (p.729, Pl.58: F)
Species Pseudaugaptilus orientalis - Plate 1 of morphological figuresissued from : O. Tanaka in Publs Seto Mar. Biol. Lab., 1964, XII (1). [p.85, Fig.216].
Female: a, habitus (dorsal); b, foreheas (left lateral side); c, last thoracic segment and urosome (right lateral side); d, urosome (dorsal); e, distal segments of A1; f, mandibular palp of Md; g, biting blade of Md and masticatory edge; h, Mx1; i, P1; j, P5.

Nota: Head and 1st thoracic segment separate, 4th and 5th thoracic segments fused.
Frontal margin of the head slightly truncate, with median papilla; in lateral aspect the head is narrowly rounded.
Rostrum with 2 long filaments.
A1 extends beyond the end of the furca by distal 2 segments; segments 23 and 24 carries each a very heavy seta on the posterior distal margin; the distal segment is 1.3 times as long as the penultimate one.
A2: exopod and endopod slender; exopod 8-segmented, 1.1 times as long as endopod.
Md: exopod and endopod of about equal lengths; masticatory lobe slender and small.
Mx1: 7 spines on the 1st inner lobe; 2nd and 3rd lobes with each 1 long seta; 2nd basal segment represented by a long strong seta; endopd with 2 small setae; exopod cylindrical with 2 strong setae of about equal lengths.
Mx2 and Mxp resemble those of P. longiremis figured by Sars.
The abdomen segments and furca are in the proportional lengths as 50:11:11:11:17 = 100. The furcal rami about as long as wide.

Compl. Ref.:
Itoh, 1970 (tab.1); Shih & Young,1995 (p.68)
NZ: 2

Distribution map of Pseudaugaptilus orientalis by geographical zones
China Seas (South China Sea), E Japan (Sagami)
N: 3
(69) F: 3,89; {F: 3,89}
Rem.: Depth: ? i(n (vertical haul 0-1000 m).
The specimen comes very near to Pseudaugaptilus longiremis. For Matthews (1972, p.55) the main character distinguishing this species from P. longiremis is the presence or absence of a spine on the 2nd segment of the exopodite of P1, is one which in Euaugaptilus at least shows intraspecific variation.
For Itoh (1970 a, fig.2, from co-ordonates) the Itoh's index value from mandibular gnathobase = 1520.
Last update : 29/01/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2022. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed December 08, 2022]

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Marine Planktonic Copepods

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