Family  : Pandalidae

            Genus   : Heterocarpus
A. Milne Edwards, 1881

 

Heterocarpus woodmasoni
Alcock,
1901

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            Common Name: Indian nylon shrimp,
mulaku chemmeen

Synonymy :
Heterocarpus wood-masoni Alcock, 1901 

Distribution:
East African coast, Indian seas, Kei Islands. In India in Andamans, and Arabian
sea off Kerala coast.

Environment:
Marine, depths of 220 to 640 m on soft sand and mud, abundant between 300 to
400m depth.

Size:
Average total length 125mm-133mm

Collection       site : Sakthikulangara,
Neendakara, Munambam,Kalamukku, Azheekkal, Ponnani

Specimens examined : 32
females and 5 males of average total length 125mm-133mm

 Description :
Rostral measurements  varying from more than twice as long as
carapace in juveniles to slightly longer than carapace in adults, no  lateral carina,  dorsal teeth with 7-12, usually 10 or 11,
teeth extending upto anterior end of rostrum and including 1 or, usually, 2 on
carapace above or posterior to level of orbital margin, and ventrally with 4-9,
usually 7 or 8, teeth; carapace somewhat 
with complete carinae on antennal and lateral, branchiostegal spine does
not overreach antennal spine; abdomen with dorsally rounded  2 anterior somites, 3rd , 4th
, and 5th  mesially carinate,
6th  with paired longitudinal
carinae, 3rd  somite having
near midlength  with median tooth, no
somites with posteromesial teeth; antennal scale decreasing in relative length
from about 2/s or more of carapace length in juveniles to little more than ½
as long as carapace in adults, distally convex blade and reaching  beyond distolateral spine;  2nd pair  of pereopods with longer member  having 20-26, 22- 26, articles

 

 

 

 

 

 

 in carpus,
shorter one with 9-12, most commonly 10, articles, carpus of 3rd pair armed
with

0-7, usually 4 or 5, spines, of 4th pair with 1-7,
usually 2-5, and of 5th pair, 0-7, merus of 3rd

pair armed with 8-18, usually 10-14, spines, of 4th
pair with 6-18, usually 12-15, and of 5th

pair, 3-12, usually 9-11, ischium of 3rd pair armed
with 1-4, usually 2, spines, of 4th pair with 2 or 3, usually 2, and of 5th
pair, invariably unarmed; maximum length of carapace about 35 mm.

 

Remarks
: Potential commercial importance, in deep
sea trawling this was a predominant species obtained from Sakthikulangara,
caught in otter trawlers. Usually caught along with Heterocarpus chaini.

Original description : Alcock, A., 1901. A descriptive catalogue of the
Indian deep-sea Crustacea Decapoda Macrura and Anomala, in the Indian Museum.
Being a revised account of the deep-sea species collected by the Royal indian
marine survey ship Investigator: 1-286, i-iv.,Plates.1-3.Indian Museum,
Calcutta.  

 

 

 

 

 

 

 

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