Paracalanus parvus   (Claus,  1863) (Copepod)
Organism information awaits expert curation
Class: Maxillopoda

Image copyrights: Susanna Knotz

Size: Length: female 0.70-1.20 mm; male 0.74-1.4 mm.

Female: The proportional lengths of the cephalothorax and abdomen are as 31 to 9; the abdomen being thus contained 3.44 times in the length of the anterior region of the body. The body is comparatively robust and the forehead is uniformly rounded, terminating below in a pair of long and delicate rostral spines. The head and 1st thoracic segment are incompletely fused, traces of the original line of separation being clearly visible across the dorsal surface. The posterior border of the thorax is slightly emarginated.
The 1st abdominal segment is armed with a row of small spinules that runs parallel to and close to the posterior margin, except on the ventral aspect. The genital aperture is somewhat angular.The 1st antenna reaches back to the 2nd abdominal segment. Segment 12 bears a short oblique row of minute spinules and segments 13 to 23 inclusive each bear a longitudinal row of spinules along the proximal half of the segment.
Cephalosome fused with the first pedigerous segment. Urosome around a third the length of the prosome, genital and anal segments about the same length.

Male: The proportional lengths of the cephalothorax and abdomen are as 28 to 11, the abdomen thus being contained 2.55 times in the anterior region of the body. The dorsal profile shows a uniform curve and there is present in the mid-dorsal line the same small transparent swelling. The 4th and 5th thoracic segments are fused but the line of fusion can clearly be seen in the lateral region. The posterior thoracic margin is somewhat sharply rounded. The abdomen consists of five segments. In the 2nd, 3rd and 4th swimming legs, the margin of the distal portion of the last segment, as well as the margin of the 2nd segment, of the exopod are fringed with small spines.

Synonym (s)
Calanus parvus Claus, 1863
Paracalanus parvus Norman and Scott, 1900
Paracalanus parvus var. perplexus Norman and Scott, 1906
Paracalanus parvus A. Scott, 1909
Paracalanus parvus Farran, 1910
Paracalanus parvus Steuer, 1910
Paracalanus parvus Sharpe, 1911
Piezocalanus lagunaris Grandori, 1912
Paracalanus parvus Sewell, 1912
Paracalanus parvus Brady, 1914
Paracalanus parvus Sewell, 1914
Paracalanus parvus With, 1915
Paracalanus parvus Fruchtl, 1920
Paracalanus parvus Fruchtl, 1924
Paracalanus parvus Sars, 1925
Paracalanus parvus Farran, 1926
Paracalanus parvus Gurney, 1927
Paracalanus parvus Farran, 1929
Paracalanus parvus (Claus, 1863)
(Senior synonym)

Common Name (s)
Economic Importance and Threats

Habitat:  Demersal, Estuarine, Coastal


• Kerala, Off Trivandrum Coast INDIA
• Maharashtra, Malad Creek (Lat: 20) (Long: 72) INDIA
• Tamil Nadu, Pichavaram (Lat: 11.48) (Long: 79.77) INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Maharashtra, Mumbai Harbour (Lat: 13.18) (Long: 80.38) INDIA
• Maharashtra, Bassein Creek INDIA
• Maharashtra, Thane Creek INDIA
• Gujarat, Jakhau-Babber Creek INDIA
• Gujarat, Sangi-Kharo Creek INDIA
• Gujarat, Medi-Sinthodi Creek INDIA
• Andaman and Nicobar Islands, Nicobars, Nankauri Harbour INDIA
• Tamil Nadu, Adyar Estuary (Lat: 13.01) (Long: 80.28) INDIA (Record: 04/1998-03/1999)
• Bay of Bengal INDIA (Record: 09/1997-08/1998)
• Tamil Nadu, Vellar Estuary (Lat: 11.48) (Long: 79.76) INDIA (Record: 09/1997-08/1998)
• Gujarat, Mahuva INDIA
• Tamil Nadu, Porto Novo INDIA
• Kerala, Alleppey INDIA
• Kerala, Kayamkulam INDIA
• Kerala, Neendakara INDIA
• Kerala, Paravur INDIA
• Kerala, Veli INDIA
• Andaman and Nicobar Islands, Andaman Islands INDIA
• Maharashtra, Versova INDIA
• Maharashtra, Mahim INDIA
• Maharashtra, Dharamtar Creek INDIA
• Goa, Off Aguada INDIA (Depth: 5 mts)
• Gujarat, Saurashtra Coast (Lat: 20.84) (Long: 68.83) INDIA
• Gujarat, Saurashtra Coast (Lat: 22.50) (Long: 70.33) INDIA
• 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)
• Maharashtra, Mumbai Harbour (Lat: 18.70) (Long: 72.85) INDIA (Record: 09/1984-11/1985) (Depth: 2.5-14 mts)
• Maharashtra, Dharamtar Creek (Lat: 18.86) (Long: 73.02) INDIA (Record: 09/1984-11/1985) (Depth: 2.5-14 mts)
• Tamil Nadu, Mandapam INDIA (Record: 07/2008-12/2008)
• Tamil Nadu, Keelakarai INDIA (Record: 07/2008-12/2008)
• Andhra Pradesh, Lawsons Bay INDIA
• Tamil Nadu, Point Calimere INDIA
• Gujarat, Off Okha Port INDIA (Record: 11/1972-10/1974)
• Gujarat, Off Rozi INDIA (Record: 11/1972-10/1974)
• Gujarat, Off Dwarka INDIA (Record: 11/1972-10/1974)
• Goa, Cumbarjua canal INDIA
• Tamil Nadu, Muttukadu (Lat: 12.78) (Long: 80.25) INDIA (Record: 02/2004-06/2006)
• West Bengal, South 24 Parganas INDIA
• Goa, Mandovi and Zuari Estuary INDIA

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Page last updated on:2011-10-28

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