Pontellopsis scotti   Sewell,  1932 (Copepod)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Arthropoda
Class: Maxillopoda
Order:Calanoida
Family:Pontellidae

Image copyrights: Biotech Books

a. The female from the dorsal side; b. The male from the dorsal side

Description
Size (female): Length1.511-1.97 mm; (male): Length 1.419 mm.

Female: The proportional lengths of the cephalothorax and abdomen are as 2.09 to 1. The segments of the cephalothorax are devoid of any hirsute covering. The posterior thoracic segment bears on each side a small marginal spine; these spines are slightly asymmetrical, that on the left side being appreciably larger and longer than that on the right.The abdomen consists of two segments with the furcal rami.The proximal segment is somewhat asymmetrical; at its proximal end it bears on each side a rod-like spine, that on the right side being usually considerably longer than that on the left; at the distal end there is a swelling on the left side, that in some examples is produced in a small papilla, while in others it is produced into a long and tapering process. Certain examples bear a rod-like spine on the right side, but in the majority of individuals this is absent. The posterior segment of the abdomen is considerably longer. The furcal rami are short and the furcal setae plumose. The right furcal ramus extends slightly further backwards than the left, owing to a slight degree of asymmetry in their point of origin from the anal segment.The 1st antenna consists of 16 free segments. Segments 2 to 5 are completely fused; segments 6, 7 and 8 are partially fused, the lines of separation, however, being visible; segments 9 to 11, and 13 and 14 are respectively fused; and segments 24 and 25 are, as usual, fused. The 14th segment bears a stout and thick spine that extends beyond the distal end of the 15th segment.

Male: The proportional lengths of the cephalothorax and abdomen are as 2.286 to 1. As in the female, the 4th and 5th thoracic segments are fused together, though the line of fusion can be detected running across the middle line of the dorsal aspect. The 5th thoracic segment is asymmetrical; on the left side there is a short and blunt spine but on the right side the segment is produced into a large stout spine that extends back to the level of the middle of the 4th abdominal segment. About half way along its length this spine becomes suddenly attenuated and there is a short projection on its inner aspect. The thoracic segments are devoid of any hirsute covering.
The abdomen consists of five segments. The 1st segment bears a small spine on its right side; the 2nd and 3rd segments are each produced on the right side in a rounded swelling, that is crowned with numerous small spines; the 4th segment is also slightly produced in certain specimens but has no spines. The furcal rami are about twice as long as broad and the furcal setae appear for the most part to be devoid of hairs, though in some there are traces of the usual plumose condition near their base. The 1st antennae are, as usual, asymmetrical, that on the right side being modified into a powerful grasping organ. The left antenna is unmodified and consists of 15 free segments. Segments 2-5 and 6-8 are fused, as in the female; segments 9 to 13 are all fused, though the dividing line between segments 11, 12 and 13 can be detected. In the manner of fusion of these proximal segments the male thus differs slightly from the female. The 2nd antenna and mouth-parts closely resemble those of other members of the genus. In the 5th pair of legs, the projection at the base of the 1st segment of the right exopod is not nearly so long and terminates in a flattened lamella.



Synonym (s)
Pontellopsis herdmani Sewell, 1912

Common Name (s)
Economic Importance and Threats

Ecology
Habitat:  Coastal

Biogeography


• West Coast INDIA
• Andaman Sea
• Gujarat, Jakhau-Babber Creek INDIA
• Gujarat, Sangi-Kharo Creek INDIA
• Gujarat, Medi-Sinthodi Creek INDIA
• Bay of Bengal INDIA
• Gujarat, Saurashtra Coast (Lat: 20.84) (Long: 68.83) INDIA
• Gujarat, Saurashtra Coast (Lat: 22.50) (Long: 70.33) INDIA
• Goa, Off Aguada INDIA (Depth: 50 mts)
• Arabian Sea (Lat: 16) (Long: 62) INDIA (Record: 12/09/1991-23/09/1991) (Depth: 200-500 mts)
• Arabian Sea (Lat: 23) (Long: 73) INDIA (Record: 12/09/1991-23/09/1991) (Depth: 200-500 mts)
• Andhra Pradesh, Lawsons Bay INDIA

Literature Source(s)
  • Othman, BHS and Toda, T (2006) Pontellid copepods from Singapore Coastal Marine Science 30(1) 305-319
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Saravanakumar, A; Rajkumar, M; Serebiah, JS and Thivakaran, GA (2007) Abundance and seasonal variations of zooplankton in the arid zone mangroves of Gulf of Kachch-Gujarat, Westcoast of India Pakistan Journal of Biological Sciences 10(20) 3525-3532 Available at - http://docsdrive.com/pdfs/ansinet/pjbs/2007/3525-3532.pdf
  • Sewell, RBS (1999) The copepoda of Indian seas Biotech Books, Delhi, India 407 pp Available at - NIO, Goa
  • Fernandes, V (2008) The effect of semi-permanent eddies on the distribution of mesozooplankton in the central Bay of Bengal Journal of Marine Research Sears Foundation for Marine Research 66 465–488 Available at - NIO,Goa
  • Patel, MI (1975) Pelagic copepods from the inshore waters off Saurashtra Coast. Journal of the Marine Biological Association of India Marine Biological Association of India, Cochin 17(3) 658-663 Available at - NIO, Goa
  • Goswami, SC and Padmavati, G (1996) Zooplankton production, composition and diversity in the coastal waters of Goa Indian Journal of Marine Sciences NISCAIR, CSIR 25 91-97 Available at - http://drs.nio.org/drs/handle/2264/2133
  • Goswami, SC and Srivastava, Y (1996) Zooplankton standing stock, community structure and diversity in the northern Arabian Sea Proceedings of the Second Workshop on Scientific Results of FORV Sagar Sampada Department of Ocean Development, New Delhi, India 127-137p Available at - http://drs.nio.org/drs/handle/2264/2147
  • Ganapati, PN and Shanthakumari, K (1961) The systematics and distribution of planktonic copepods in the Lawson's bay, Waltair Journal of the marine biological association of India The marine biological association of India 3(1&2) 6-18 Available at - NIO, Goa

Page last updated on:2011-05-19

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