Valdiviella minor   Wolfenden,  1911 (Copepod)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Arthropoda
Class: Maxillopoda
Order:Calanoida
Family:Aetideidae

Description
Size (female): length 4.0 mm.

The head and the 1st thoracic segment are completely fused but traces of the line of fusion of the 4th and 5th thoracic segments can be detected. The posterior thoracic margin is rounded.The proportional lengths of the cephalothorax and abdomen are as 88 to 47, so that the abdomen is rather more than half the length of the anterior region.

The abdomen consists of 4 segments.

The 1st segment is crossed on its dorsal aspect by a thickened ridge of chitin; the 1st, 2nd and 3rd segments are all armed across their dorsal aspect with rows of fine spines running along the posterior margins.
The 1st antenna reaches to a little beyond the posterior margin of the 1st thoracic segment. This appendage has only 20 separate segments; the 8th and 9th are fused, so also are the 24th and 25th. The 10th, 11th and 12th segmentsa are very short but the lines of division between them can be clearly made out.

The 2nd, 4th, 6th and 8th segments are armed with a single spine each.
The 1st pair of swimming legs show a distinct trace of division between the 1st and 2nd segments of the exopod and each part is armed with a marginal spine.

The 2nd pair of legs, shows also a line of demarcation between the 1st and 2nd segments of the exopod and similar traces of the line of separation between the 1st and 2nd segments of the endopod can equally be detected. The 2nd basal segment is armed on its outer margin with a small spine.
In the 3rd leg the proximal segments of the exopod are completely fused but the endopod consists of three segments, the division between the 1st and 2nd segments being quite clearly marked, if not actually functioning as a joint.

In the 4th pair of legs the two proximal segments of the exopod are incompletely fused and again the endopod consists of three segments.
5th pair of legs is missing in this sex.



Synonym (s)
Valdiviella minor Wolfenden, 1911

Common Name (s)
Economic Importance and Threats

Ecology

Biogeography


• Bay of Bengal 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:2011-03-11

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