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

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