Table 1 Morphological differences in descriptions of the first larval stage of the genus Periclimenes
First zoeal stage morphological features | P. agag (Gurney 1938) | P. diversipes (Gurney 1938) | P. grandis (Gurney 1938) | P. calmani (Gurney 1927) | P. pandionis (Gore et al. 1981) | P. sagittifer (present study) | |
|---|---|---|---|---|---|---|---|
Total length (mm) | 1.63–1.80 | 1.9 (G) 1.70 (K) | 1.60 | 1.63–1.80 | 1.65–1.7 | 1.70 | 2.14–2.21 |
Carapace length (mm) | NAa | 0.54 | NA | NA | NA | 0.54 | 0.58–0.60 |
Rostrum | Minute; downturned | Minute (G), long (K); upturned | Long; downturned | Minute; downturned | Long | Long; downturned | Long; downturned |
Lateral spines on abdominal somite 5 | Absent | Absent | Absent | Absent | Present | Absent | Absent |
Antenna, number of distal segments | 3 | 4 (G), 5 (K) | 3 | 3 | 4 | NA | 4 |
Antenna, exopod outer setae | 2 | 2 | 2 | 2 | 2 | 2 | 1 |
Maxillule, distal spines on endopod | 1 | 1 (G), 2 (K) | 1 | 1 | 2(?) | 1 | 2 |
Maxilla, basal lobe of endopod | Present | Present | Absent | Present | Absent | Absent | Absent |
Maxilliped 1, endopod segments | Unsegmented | 2 (G) | Unsegmented | Unsegmented | NA | 3 | 4 |
Maxilliped 2, endopod segments | 3 | NA | NA | 3 | 4 | 3 | 3 |
Maxilliped 3, endopod segments | 3 | NA | NA | 3 | 3 | 3 | 3 |
Pereiopod 1, biramous bud | Present | Present | Present | Present | Present | Present (?) | Present |
Pereiopod 2, biramous bud | Present | Present | Present | Present | Present | Present (?) | Present |
Telson, posterior margin | Nearly straight | Nearly straight | Nearly straight | Nearly straight | Small median notch | Small median notch | Small median notch |