The female reproductive system consists of paired ovaries (dorsum-lateral to the digestive system, and connected in the middle, as an "H" shape) and oviducts, which are connected to gonopores located on the ventral surface of the exopodites of the second pereiopods
Discrimination of the different stimuli is mediated by peripheral chemoreceptors grouped within a varied array of cuticular sensory organs called sensilla, which are located mainly on the cephalothoracic appendages including antennae, maxillipeds (mouthparts), antennules, and pereiopods
(walking legs) (Schmidt and Mellon, 2011; Thiel and Breithaupt, 2011).
Armases species have a flattened and slightly broader than long carapace, long propodi, and short dactyli in the legs for climbing the tree stem (VANNINI et al., 1997), mobile fingers often extended into the base with granules scattered on the dorsal surface, a second pair of pereiopods
without pubescence on the dorsal surface of the propodus (ABELE, 1992).
Sex of lobsters was determined by the location of the gonopores on the base of the 3rd or 5th pair of pereiopods
in males and females, respectively (Abele, 1982; Hardwick and Cline, 1990).
In males, a larger carapace can mean a larger size, or even a more robust basis for the insertion of muscles of pereiopods
and chelipeds , essential in agonistic encounters in the competition for territory or females [15, 51-53].
The target tissue located at the base of the fifth pereiopods
(the approximate location of the AG in male F.
After this acclimation period to laboratory conditions, females were weighed and a sample of hemolymph (100 [micro]L) was withdrawn from the base of the fifth pair of pereiopods
, by means a 1mL syringe, provided with a 25G needle.
Differences in the morphology and structure of mouthparts and pereiopods
of crayfish are useful in classifying them for systematic purposes.
First and second Pereiopods
: Endopod 5-segmented, completely developed, distal segment ending in a strong spine, dorsal and ventral sub-exopodal spines absent, coxal spine present but not elongated (disposition of setae as illustrated); exopod with 5 pairs of long and plumose setae.
Endobenthic crabs like those mentioned typically have pereiopods
with distal podomeres with a sharp edge, mechanically appropriated for an infaunal mode of life.
2A, C), the similar morphology of pereiopods
3-5 but the distinctly different dactylus of pereiopod
2, the well developed suture on both uropods, and other characters of the genus (see Goy and Provenzano 1979; Alvarez et al.
Ischia of third pereiopods
of males with hooks: hooks over reaching basioischial articulation in form I males only.