Lophothrix frontalis f. major     (Copepod)
Organism information awaits expert curation
Class: Maxillopoda

Size: length 5.812-6.125

The proportional lengths of the cephalothorax and abdomen are as 42 to 11, so that the abdomen is contained 3.82 times in the length of the anterior region of the body.
The abdomen consists of four segments
The 1st antenna reaches back to the 3rd abdominal segment.
The 1st and 2nd segments are partially fused and segments 8 and 9 completely so.
In the 2nd antenna, there is a well-marked row of hairs on basal 1. The terminal segment of the exopod is short. The terminal segment of the endopod is fringed with a clump of curved hairs and there are 8 setae on the outer lobe and 6 on the inner.
The mandibular palp is well-developed and the exopod and endopod are sub-equal in length; the endopod consists of two segments, of which the proximal bears 2 setae and the distal 9.
The 1st maxilla has the usual structure. The 1st inner or masticatory lobe bears 13 setae. The 2nd inner lobe has only 2 setae and the 3rd lobe 4. The basal segment bears 5 setae and the endopod 7. The exopod carries 9 setae and there are 9 setae on the outer lobe.
The 2nd basal segment of the maxilliped is armed along its anterior margin with a row of spinules; the arrangement of these spinules differs in different parts of the row. Extending from theproximal part of the segment to half-way between the 1st and 2nd seta the row is a compound one and consists of several lines of spines, but from this point to beyond the 2nd seta and nearly to the base of the 3rd the line of spines consists of a single row of smaller spines. At this point there is a break in the armature of the segment, but just beyond the 3rd seta there is another linear row of spines extending to the distal end of the segment.

Synonym (s)

Common Name (s)
Economic Importance and Threats



• INDIA (Record: 1910-1925)

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

Page last updated on:2009-08-05

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