Hemirhabdus grimaldii   (Richard,  1893) (Copepod)
Organism information awaits expert curation
Class: Maxillopoda

a. The proximal segment of the 1st antenna.
b. The 1st maxilla.
c. The 2nd maxilla.
d. The 1st swimming leg.
e. The 4th swimming leg.
f. The 5th leg.

Size: Female total length 9.21 mm.

The proportional lengths of the cephalothorax and abdomen are as 265 to 121, so that the abdomen is contained 2.19 times in length of the anterior region of the body. On the segments of the abdomen are several series of pores connected with gland cells lying within the segments. A single pore is situated in the middle dorsal line and on either side are least 16 others. On the 2nd free segment (segment 3) three pores, two close together anteriorly and a single one more posterioly, lie in the lateral line and on the dorsal-lateral aspect are three pairs arranged antero-posteriorly. On the 4th segment near the posterior margin is a line of six pores, three on either side of the middle line, and a single pore lies on each side at the junction of about the anterior and middle thirds of the segment, while a pair open on each side laterally. In the 5th segment there are two pores near the anterior margin, one on either side of the middle line, and an antero-posteriorly arranged pair is situated on the lateral aspect. Two pores open on the dorsal aspect of the furcal ramus.
The 1st antenna reaches to beyond the posterior end of the abdomen by the last four segments.
The proximal segments bear numerous pores for small glands situated within the segment; of these there are 8-10 on segments 1; 3 on segments 2 ; 1 and 3 on segment 4 ; 3 on segment 5 ; 2 on segment 6 ; 2 on segment 7 and 1 on segment 8 and 1 on segment 12.

Synonym (s)
Heterochaeta grimaldii Richard, 1893
Heterorhabdus grimaldii Giesbrecht and Schmeil, 1898
Heterorhabdus grimaldii Wolfenden, 1905
Heterorhabdus grimaldii Farran, 1908
Hemirhabdus grimaldii Wolfenden, 1911
Heterorhabdus grimaldii Sewell, 1913
Macrorhabdus grimaldii Sars, 1920
Hemirhabdus grimaldii Sars, 1925
Hemirhabdus grimaldii Farran, 1926

Common Name (s)
Economic Importance and Threats



• Bay of Bengal (Lat: 7.35) (Long: 85.12) INDIA (Record: 21/10/1911)

Literature Source(s)
  • Sewell, RBS (1999) The copepoda of Indian seas Biotech Books, Delhi, India 407 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org

Page last updated on:2011-03-17

Back to Search