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Table 4 Summary of readily discernible features characterising the larvae and decapodid of M. lar

From: Complete larval development of the Monkey River Prawn Macrobrachium lar (Palaemonidae) using a novel greenwater technique

Stage Eyes Rostrum (Teeth) Antennal flagellum (Segments) Antennal flagellum (Segments) Uropod Telson Pleopods Pereiopods
I Sessile 0 0 0   Non-articulating join with 6th abdominal somite   
II Stalked 0 0 0 Simple exopods present Partially articulating join with 6th abdominal somite   
III   1 3 0 Exopods emerge Fully articulating join with 6th abdominal somite   
IV   2 3-4 0 Endopods emerge    
V   2 4 1   Shape changes from a fan-like to rectangular   5th pair emerge
VI*   2 5 1    Buds for 3rd and 4th pair emerge, with 5th pair also present on some individuals  
VII**   2-3 6-8 1    Buds for 2nd and 5th pair emerge, already emergent buds for 3rd and 4th pair elongate  
VIII*   3 8 2    3rd and 4th pleopod pairs now biramous, with 5th pair also biramous on some individuals. Buds for 1st pair emerge  
IX*   3-4 9 3    All pleopods now biramous and possess setae. Buds of appendices internae seen on 3rd and 4th pleopods  
X*   4-5 10 4     Chelae on 2nd pair visible
XI**   5-6 or 6-7 14-18 6-8    Appendices internae well developed on 3rd and 4th pleopods Chelae on 2nd pair larger.
XII*   7-8 15-20 9-12     Chelae on 1st pair visible
XIII*   8-9 29+ 14+     
Decapodid   8-9 (v.c.#) + 1 (d.c.#) 40+ 16+     Exopods with natatory setae absent or greatly reduced. Chelae on 2nd pair prominent
  1. *Indicates stages which may have at least 2–3 instars and **indicates stages which may have 3–4 instars. #V.c. refers to the ventral carina and d.c. the dorsal carina of the rostrum.