The legs of copepods in the genus Hamaticolax have distinct composition in terms of the number of segments (proximal, medial and distal articulations) that form the endopodite and exopodite
During zoea I, the antennal exopodite
is long, with a small spine in the distal region.
of antenna (A2) 2-segmented with 4 setae, mandibular palp 1-segmented with 4 setae.
We observed a similar feeding behaviour as in benthic Leydigia, studied by Fryer (1968), and active use of the exopodite
Cephalic section of telson with two immovable spines in each caudolateral corner extending over exopodite
. Caudal margin of cephalic section of exopodite
with numerous fixed spines (21) and one large movable spine in caudolateral corner.
These data are used to validate several morphological metrics (relative exopodite
length, ovigerous condition) of functional sexual maturity.
However, the telson of each [IVA.sub.1] larva retained its stage Ill shape, with the uropodal exopodite
being underdeveloped, lacking both the spine located on the outer margin and the distal-most joint, and the endopodite being smaller than that of a normal postlarva in most cases (69.6% of those examined).
jarai; merus lacking spines or tubercules; exopodite
reaches distal end of merus.
Holotype, [male], body size: 1.15 mm; general aspect of male as in Figure 1; right antenna of male as in Figure 3a, 3b; 5th leg of male presents the terminal claw relatively short almost the same length as the second segment of exopodite
and the proximal margin of second segment of exopodite
is half the distal margin with a strong concavity in the inner margin (Figure 5a, 5b).
with 4+2, 2, 2 3 long and 1 short spines.
The Brazilian specimen features agree with those of the typical form (Figures 1-10): head and carapace surface covered with long hairs; head broad and without supraocular depression; antennule and antenna densely ciliated; anterior seta on the penultimate segment of the female's first trunk limb toothed; postabdomen with seven to ten lateral feathered teeth and one short bident tooth; ephippium with two eggs, and covered with brown polygonal cells; males hairy, with bent antennules, first trunk limb with large hook on the endopodite and long seta on the exopodite
. Body lengths of parthenogenetic females ranged from 880 to 1088 [micro]m (n = 12), sexual females from 928 to 1024 [micro]m (n = 10), and males from 656 to 768 [micro]m (n = 6).
A quantitative analysis of exopodite
beating in the larvae of the lobster Homarus gammarus (L.).