Valdiviella brevicornis   Sars G.O,  1905 (Copepod)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Arthropoda
Class: Maxillopoda
Order:Calanoida
Family:Aetideidae

Description
Size (male): length 5.0 mm.

The abdomen consists of five segments.

The 1st antenna shows the usual tendency to the fusion of certain segments; segments 8 and 9 are completely fused and 9 and 10 partially so; segments 24 and 25 are fused and in the appendage of the right side segments 20 and 21 are completely fused.

The mouth-parts are very much reduced. The mandible possesses no biting edge and consists merely of the palp and a rounded basal plate. The two maxillae are also reduced. The maxilliped is not so greatly affected as the preceding appendages, but it is more slender than in the female and the 1st basal segment bears only a spine-like seta at its distal end, while the 2nd basal is devoid of the row of spines on the anterior margin.Segmentation of the swimming legs is more clearly demarcated in the male than in the female.
In the first pair of legs the exopod is composed of three distinct segments, having the proportional lengths of 9: 7: 8. The endopod consists of only a single segment and reaches to the level of the joint between segments 2 and 3 of the exopod.

In the 2nd leg the exopod is three-jointed, a clear line of division occurring between segments 1 and 2. The endopod consists of a single segment.
In the 3rd and 4th legs both exopod and endopod consist of two segments, the proximal joint in each ramus consisting of the fused 1st and 2nd segments; in both limbs traces of the line of separation between these proximal segments can be detected but this partial separation is much more noticeable in the 4th pair.

The 2nd basal segment of the 2nd, 3rd and 4th legs bears on its outer margin a minute denticle or spine.



Synonym (s)
Valdiviella brevicornis Sars, 1905
Valdiviella brevicornis A. Scott, 1909
Valdiviella brevicornis Wolfenden, 1911
Valdiviella brevicornis Sewell, 1913
Valdiviella brevicornis Sars, 1925

Common Name (s)
Economic Importance and Threats

Ecology

Biogeography


• Bay of Bengal INDIA (Record: 21-10-1911)
• INDIA (Record: 28/04/1925)

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
  • Boltovskoy, D (Ed.) Zooplankton of the South Atlantic Ocean Marine Species Identification Portal Available at - http://species-identification.org/species.php?species_group=Zsao&menuentry=inleiding

Page last updated on:2011-09-12

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