Markhaseva, 1983a
Short Description:
Chiridiella sarsi is an aetideid calanoid copepod known after female (4.40-4.50 mm in length) from Arctic Basin in bathypelagic.
Taxonomic Description:
Female. Total length 4.40-4.50 mm. Cephalothorax 3.1-3.3 times longer than abdomen. Anterior part of skeleton structures of the genital field not wavy (ventral view). A1 24-segmented, reaching Abd2. Ri A2 is two thirds of Re length. External lobe of Ri2 A2 with 6, internal with 5 long and 2 short setae, coxo- and basipodite with 1 seta. Ri2 Md with 8-9 setae. Mx1 gnathobase with 8-10 setae, second internal lobe reduced, the third with 3, Ri with 4, Re with 5 setea, more often with 8 setae, on external lobe 7 setae (studied specimens had differences in structure of Mx1). Mx2 as in Ch. abyssalis , its first endite with 2 setae. In the distal group of setae at Mxp protopodite - 2 setae and nipple, Ri1 Mxp with 3 medial setae. P1 with one-segmented rami, on Re 1 external terminal spine. P2-P4 with one-segmented Ri, on P3-P4 there are weak traces of subdivision between Ri1 and Ri2 , and also Ri2 and Ri3 are visible.
Male unknown.
Remarks. Species is very close to Ch. macrodactyla Sars; Ch. abyssalis Brodsky; Ch. gibba Deevey; Ch. ovata Deevey but differs in: larger size of the body; length of A1, also higher number of setae on Ri2 Md and Re Mx1.
Vertical distribution:
The species was found in hauls 750-4350 m and 1110-4300 m (Markhaseva, 1983).
Geographical distribution:
Arctic Ocean: the central part (Markhaseva, 1983a).
Type locality: 86°34'N 94°20'E.
Material examined:
2 females from samples: 510, 515. See examined samples module.
Holotype: female, N 1/64783; "SP-5"; 1955/1956; 86°34'N 94°20'E; 18 March 1956; stratum of sampling 4350-760 m.
Paratypes: 1 female, N 2/64784; "SP-5"; 1955/1956; 86°29'N 99°32'E; 21 December 1955; stratum of sampling 4330-1100 m.