External Descriptive Characters

1. Colour of Body : Greyish greenish
2. Decoration : Absent
3. Body shape : straight
4. Rostral shape : straight
5. Rostral Size : Small
6. Rostral Condition : Teeth only dorsal side
7. Rostal formula : D/V -8/0
8. Carapace : a)Size of Carpace : Moderate b) spines of carpace : Branchiostegal spine -Absent hapatic spine -Present Antennal spine -present Post orbital spine -absent Supra hepatic spine -Absent c) Carina of Carapace : Post rostral carina : Present Hepatic Carina: Present Adrostral Carina : present Branchiocardial Carina : present Longitudinal Carina : Absent d) Slcus of Carapace : Branchiocardiac sulcus - Present Hapatic sulcus : present Post rostral sulcus - presnt Adrostral sulcus - present Longitudinal sulcus - present
9. Eye Condition : Stalked and Compound Antennules : a) number of antennular Flagella : one pair b) Size of antennular Flagella : Short
10. Antenna : a)Size of antennular flagella : Short b)condition of antennular flagella : very smooth c)Size of antennal Scale : short
11. Condition of abdomen : Straight
12. Abdominal Pleura : Simply previous absominal pleura overloped abdominal pleura
13. Abdominal Carina : Absent
14. uropods : a) Size : Small b) Conditiion : Smooth
15. Telson : a)Condition : Non-spiny b) Size : Small c) Groove on dorsal surtface : Absent d) Spine : Absent
16. External genital organ : Petasma Absent , so it is female .

Morphometeric Characteristics

a. Total Length : 11cm
b. Stander Length : 7.8cm
c. Carapace Lenght : 3.1cm
d. Rostral Length : 3.4 cm
e. Abdominal lenght :
f antennal scalle legthe :

Specific Characters Grouped in to differnt taxa

a. Join Footed Animal Hence the specimen Belongs to the phylum:Arthropoda
b. 5 segment of head fused so the specimen belongs to the class : Crustacea
c. Tall walking legs so the specimen belongs to order : Dcapoda
d. Last two pairs walking legs are cephalopode so the specimen belongs to the Family : Penadeae
e. Teeth on upper side only so hence the specimen belongs to the Genus : Metapenaeus
f. Rsotral formula p/v 8/0 So this Species: M. Monocerus

Classification

Phylum: Arthopoda
Class : Crustacea
Order: Decapoda
Family : peaedea
Sub family : peaenae
Genus : Metapenaeus
Species :M. monocerros

Conclusion

on the basis of external characters monophometric characters meristric characters and finally specific characters grouped into different taxa the speciment is Metapenaeus monoceros

References :

Bandhopaddhey A 2004 " matsya srenibinnash taltya o proyog" kabir publication, Bnglabazar Dhaka

You can also learn here much wikipedia

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