Megokris narrow, roughly hornlike projections extending laterally and with

 

 

Megokris granulosus (Haswell, 1879) 

 

Common
name : Coarse shrimp

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Synonyms : Penaeus granulosus Haswell,
1879; Trachypenaeus granulosus (Haswell,
1879);
Trachypeneus furcilla Hall, 1961; Trachypeneus
salaco de Man, 1907 

Distribution
: Indo-West
Pacific: Saudi Arabia to Taiwan and Australia

Environment
: Tropical,
Benthic; depth range 5 – 81 m.

Size
: Female
9 cm male 5.1 cm

Collection
site : Neendakara

Species
examined :

Description : Body thickset. Integument thick, densely pubescent.
Rostrum short, reaching between distal margin of fIrst antennular segment and
about end of peduncle; armed with dorsal teeth only; epigastric tooth
distinctly separated from first rostral. Carapace with orbital angle sharp or
armed with small spine; antennal and hepatic spines present; pterygostomian
angle blunt or acute; postocular sulcus shallow or obsolete; gastro-orbital
carina lacking; orbito-antennal sulcus feeble or lacking; cervical sulcus
short; hepatic sulcus extending just ventral to hepatic region or farther anteroventrally;
branchio.cardiac carina usually absent, occasionally clearly distinct;
longitudinal suture short, ending well anterior to hepatic spine; transverse
suture usually clearly distinct. Abdomen with sixth somite lacking cicatrix.
Telson with 3 pairs of movable lateral spines. Antennule lacking parapenaeid
spine; antennular flagella shorter than carapace. Palp of first maxilla entire,
distally tapering to acute apex, produced into small setose proximolateral,
broad, setose proximomesial and small acute distomesial lobules, latter bearing
1-3 sharp spines and armed with distoventral row of spinules. Fourth and fifth
pereopods with dactyl neither elongate nor subdivided. Basial spine lacking on
third maxilliped, present on first and second pereopods; small ischial spine on
first pereopod, lacking on second. Epipod on first to third pereopods2, or on
third only. Petasma

 

 

 

 

 

symmetrical, semiclosed, variable in shape, with
lateral lobes distolaterally produced into either moderately broad to narrow,
roughly hornlike projections extending laterally and with hook-like tips
curving distally or distoniesially, or extremely broad basally but narrowing
rapidly, ending in distally directed tips. Appendix masculine subquadrangular
with rounded corners. Thelycum closed, with plate of stemite XIV deeply
excavate anteriorly, extremely short posteromedially, expanding laterally,
flanking strikingly large, sometimes tongue-like, caudal extension of median protuberance;
mesial margins of plate in contact with, or narrowly separated from
protuberance, or forming narrow flaps; anterior sternal invagination

(other than seminal receptacles) lacking, thus
neither transverse groove nor median pocket present; median protuberance
uniquely extending caudally for almost entire length of sternite XIV. Seminal
receptacles consisting of paired bilobed sacs, large posterior lobe and small
anterolateral one, with strongly curved slitlike opening lying on anteromesial
sideoflarge lobe, joining cavity dorsal to and at about midlength of median
protuberance, near base of fourth pereopod. In
males, distolateral projections of petasma widely apart; in females, anterior
plate of thelycum with a backwardly directed
projection.

 

Remarks
:

 

Original description : Haswell, W.A., 1879. On the Australian species of Penaeus, in the
Macleay Museum, Sydney.— The Proceedings of the Linnean Society of New South
Wales 4: 38-44.