A flap of the
urosome can add strength to the leg movement.
Urosome with four segments, genital double somite subquadrate, lacking lateral medial protrusions and with rounded integumental window on each side of posterior half (arrows in Fig.
Abdomen with a broad white stripe close to thorax,
urosome with a narrow grayish-yellow stripe.
About this same length was found for the two spines on the anterior third of the long
urosome. The caudal rami have an inner and outer setose margin.
Antennule (A1), fifth leg (P5), genital somite complex and
urosome somites usually contain distinguishable sexual characters that display dimorphism in the order Calanoida.
Females of this species can be distinguished by 1) the distal digitiform process on the outer lobe of the fifth leg; 2) the genital double somite being longer than wide, representing about 55% of length of
urosome length; 3) the extremely slender body; and 4) the relatively short antennule, which equals only 22% of the total body length.
Urosome comprising P5-bearing somite, genital double-somite, and anal somite (Fig.
R III: in copepods it corresponds to the
urosome with caudal ramus, whereas in cladocerans it includes the posterior part of the carapace and the postabdomen.
During the escape, the antennules are folded against the body sides with legs flattened against the
urosome and the caudal rami folded shut like a closed fan (Fig.
The female carried 4-5 eggs of 0.09 mm diameter that were loosely attached to the
urosome. Nearly complete nuclear 18S and 28S rRNA gene sequences and a partial mitochondrial cytochrome c oxidase subunit 1 (C01) gene sequence were obtained and are made available for future phylogenetic and systematic work.