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By Shravan Kumar Sharma
LOBSTERS IDENTIFICATION
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General morphology of Lobsters Body consists of two main partsa) Cephalothorax with its appendages.
b) Abdomen with its appendages.
Cephalothorax consists of 14 segments (6
cephalon and 8 thorax)a) Somite 1 ophthalmic somite, carries the eyes,
usually movable and consists of a stalk.
b) Somite 2 antennular spine carries antennules
c) Somite 3
antennal somite, carries the antennaed) Somite 4 to 9 carry mouth parts.
e) Somite 10 to 14 carry 5 pairs of Periopods.
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Abdomen consists of 6 segments (15 to 20)
Dorsal part
tergite Ventral part sternite
Lateral part pleura
From 15 to 19 5 pairs of pleopods are there.
Somite 20 bears the tailfan, which consists of a
pair of uropods and unpaired telson.
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Panulirus homarusAbdomen segments with anterior margins of
transfer grooves.
Antennal plates with 2 pairs of large spines and a
few spinules.
Legs with inconspicuous, irregular spots and
short stripes.
Body with greenish to blackish with numerous
very small, white spots without transfer bands. White and greenish bands present in antennules.
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Panulirus ornatus (Ornate spiny lobster)
Abdomen segments smooth, without a transfergroove with a broad transfer band of a brown
color over the middle and only 2 white blotches
on either side.
Antennular plate with 2 pairs of large spines.
Legs conspicuously and irregularly spotted.
Bluish or greenish spines on carapace yellow.
Anterior part of carapace on and near bases ofthe frontal horns and the anterior spines with a
vermicular patter of pale and dark lines.
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Panulirus polyphagus (Herbst,
1793)
Abdomen smooth, without a transverse groove, a
transverse white band present along posterior
margin of segments.
Antennular plate with 2 large spines, without
spinules.
Legs irregular and inconspicuously blotched.
Antennules broad banded.
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Panulirus versicolor
Abdominal segments without a transfer groove
with a white band along posterior margin,
flannked at either side by a dark band.
Antennular plate with 4 large spines.
Legs and antennules longitudinally striped.
Carapace with a characteristics pattern of dark
blue areas with white lines.
Bases of antennal bright pink not extending on toantennular plate.
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Panulirus penicillatus
Abdomen segments with distinct transverse
grooves and numerous, very small white spots,
but without a pale band along posterior margin.
Two pairs of almost equal spines joined at their
bases on the antennular plate.
Males usually darker than females.
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Genus puerulus First pair of legs not enlarged with no trace of a
pincer without cross bands.
Carapace without a scale-like sculpture.
Tail variously coloured, smooth or with at most 2
transverse grooves.
Two distinct. Widely separated tooth-like frontal
horns, between which the anterior margin of the
carapace is visible.Antennal flagella, although large and firm, quite
flexite.
Flagella of antennules short, shorter than last
segment of antennular peduncle.
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Puerulus sewelli
Carapace angular, with a median and 2 lateral
tuberculate longitudinal ridges behind the transfer
cervical groove and 3 pairs of ridges in front
median postcervical ridge wth 8 small teeth
frontal horns.
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The most common genus coming under the family
Scyllaridae is Thenus
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Thennus orientalis
Widest in front and distinctly narrowing porteriorly
Lateral margin straight with only two teeth.
Fifth segment with a sharp spiniform tooth in themiddle of posterior margin.
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