Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Tortanidae ( Family )
            Tortanus ( Genus )
                Atortus ( Sub-Genus )
Tortanus (Atortus) processus  Mulyadi, Nishida & Ohtsuka, 2017   (M)
Mulyadi, Nishida & Ohtsuka, 2017 (p. 93, Descr. M, figs. M, Rem.)
Species Tortanus (Atortus) processus - Plate 1 of morphological figuresIssued from: Mulyadi, S. Nishida & S. Ohtsuka in Crustaceana, 2017, 90 (1). [p.94, Fig.9].
Male (from 1°23.291'N, 125°06.460'E): a, habitus (dorsal); b, pediger 5 and urosomites 1-2 (left lateral view); c, urosomotes 1-3 (dorsal); d, right A1 (number of ancestral segment indicated by Roman numerals); e, right P5; f, left P5.

- Prosome about 2.3 yimes as long as urosome.
- Posterior corners of prosome produced into symmetrical, rounded lobes.
- Left lateral side of pedigerous somite 5 with semicircular process on ventral margin.
- Genital somite asymmetrical, left margin more convex than right, and with semicircular process posteriorly.
- Urosomite 2 with 2 right posterolateral processes furnished with setule, larger one of which reaching anterior 193 of urosomite 3.
- Caudal rami asymmetrical, right ramus wider than left.
- Appendages as in male T. (A.) sulawesiensis, except right A1 and P5.
- P5: Right leg coxa broad and acute at its base without ornament; distal half of basis broad, semicircular, bearing digitiform process with proximal and terminal setules on medial margin; exopod stout and claw-like, furnished with 2 setules on medial margin. Left leg medial margin of coxa with large triangular process from its base to anterior 3/4; basis elongate, with proximomedial papilla with terminal setule and irregular, rounded processes along inner margin; exopodal segment 1 slightly curved medially with papilla bearing terminal setule at proximal 2/5 of medial margin; exopodal segment 2curved inwards with subterminal lateral spine, 3 (each proximomedial-, distomedial- and mid-lateral) setules, and 2 hairy rows on proximal half of medial margin.

NZ: 1

Distribution map of Tortanus (Atortus) processus by geographical zones
Indonesia (off Tanjung Merah, Sulawesi Is.).

Type locality: 1°23.491' N, 125°06.460' E.
N: 1
(1314) M: 1,87-1,89; {M: 1,87-1,89}
Rem.: For Mukyadi & al. (2017, p/95), Tortanus (A.) processus belongs to the brevipes species complex, but can not be assigned to either the rubidus or the longipes species group, since the posterior end of its prosome is symmetrical (as in the rubidus group), but the basis of the male right P5 is broad and semicircular and the medial margin of the basis of the male left P5 has a series of processes (as in the longipes group). Nevertheless, T. (A.) processus is distinguished from the other species of the species complex by the semicircular ventrolateral process of the fused Pdg5 and the large triangular process on the coxa of the left P5.
Last update : 05/04/2018
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2023. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed March 21, 2023]

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