Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Aetideidae ( Family )
            Chiridiella ( Genus )
Chiridiella trihamata  Deevey, 1974   (juv. F)
Deevey, 1974 (p.454, Descr.juv.F, figs.juv.F)
Species Chiridiella trihamata - Plate 1 of morphological figuresissued from : G.B. Deevey in Bull. Mar. Sc., 1974, 24 (2). [p.455, Fig.9].
Immature Female (from 32°10'N, 64°30'W): a, habitus (lateral); b, A2; c, P1; d, P2; e, Mxp (endopod setae not shown); f, Mx1; g, P3; h, P4; i, Md; j, Mx2.
Scale beside a for part a; in center for parts b-j. Scales in mm.
Nota : Head and 1st thoracic segment separate, around 50 % of cephalothorax length, cephalothorax 82 % of total length ; urosome 22 % of cephalothorax length. A1 22-segmented, as long as cephalothorax.

Species Chiridiella trihamata - Plate 2 of morphological figuresChiridiella trihamata immature female ;
1 - Mx2 lobes without spines arranged as pincers.
2 - 3rd, 4th and 5th lobes of Mx2 with enlarged hooklike spines .
3 - A1 approximately cephalothorax length.
4 - Endopods of P1-P4 1-segmented.
5 - Exopod of P1 with no edge spines.

Compl. Ref.:
Deevey & Brooks, 1977 (p.256, tab.2, Station "S")
NZ: 1

Distribution map of Chiridiella trihamata by geographical zones
off SE Bermuda: Station "S" (32°10'N, 64°30'W)
N: 2
(224) juv.F: 2,45
Rem.: bathypelagic. Sargasso Sea: 500-1000 m (Deevey & Brooks, 1977, station "S");
For Deevey (1974, p.456) although only a single immature female was obtained, the structure of Mx2 is sufficiently distinctive, and would be identical in the mature female. This species is closely related to C. subaequalis, C. chainae, C. bispinosa, and has a brachydactyla type of Mx2. It differs from all others except the female of C. reducta Brodsky in lacking an outer edge spine on the exopod of P1. It is most closely related to C. subaequalis Grice & Hulsemann in the structure of Mx2, but it differs from this species in having fewer setae on the 1st basipod segment of Mxp, in lacking spinules on lobes of Mw2, and in having no edge spines on P1 (where C. subaequalis has 2 edge spines.
Last update : 26/07/2018
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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 May 25, 2024]

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Marine Planktonic Copepods

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