A propodus spine (a pair of distinct spines) and weak polygonal patterning on chelipeds and legs were considered for S.
After matching morphological characteristics from a large number of samples identified with molecular markers, we believe the number of spines at the outer margin of the carpus of chelipeds may be useful for identification instead of polygonal patterning or differences in the size of the frontal lobe spine and the contour of propodus spine.
Basis longer than propodus including fixed finger, divided unequally by triangular sclerite, with 1 dorsodistal seta and a small, inner dorsodistal process extending beyond carpus.
Ventral margin of propodus including fixed finger, shorter than merus, with 1 spiniform seta at dactylus insertion.
The dactyl formula ranges from 0, 4-8, I, 3-4 (5), while the propodus formula is 0, i, 3-6, I, (2) 3-4.
The formula is derived by counting the number of denticles on distal edge of the dactyl and propodus (see example in Fig.
1J) not chelate; 3 long terminal spines on dactylus; dactylus short; propodus longer than carpus; exopod without natatory setae; endopod of 2nd pereiopod chelated (Fig.
6H) Propodus armed with many spines; dactylus with 2 spines.
is abbreviate distally and does not form a normal palm.
The carapace width (CW) and carapace length (CL), the abdominal width (AW; measured at the junction between the fourth and fifth abdominal segment), the length of the propodus
of the major cheliped (ChL), the length of the second right pleopod (2PL), and the length of the merus of the second and third left pereopod (first [1L] and second [2L] walking leg, respectively) of each crab were measured using an SPI 2000 series dial caliper (precision, 0.
The length and height of the propodus
of the largest cheliped, the length of the merus of the second walking leg, and the length of the primary pleopod of each male crab in Cockburn Sound and Shark Bay were measured to the nearest 0.
becoming shorter proportionally, with mat of dense spinules extending to midlength of flexor surface, followed by two rows of spinules in proximal half; merus unarmed or one or two spines; ischium with one or two spines.