Genus: Sicyonia H. Milne Edwards, 1830
Sicyonia parajaponica Crosnier,
site : Neendakara
examined : Single specimen collected.
Colour of the body
usually red or pink ; sometimes with pale markings on antennular flagella and
tips of uropods.Well developed rostrum which extends to middle of the eye, with more than 3 upper
teeth includes those present on
carapace; at base of eyestalk no
styliform projection, on the inner
border a tubercle is present; upper and lower antennular flagella which is of the same length, attached to tip of antennular peduncle with postantennal or postorbital spine on carapace;
long cervical groove reaches to about
dorsal carapace. Well developed periopods, fourth leg bearing 2
well-developed arthrobranchs (hidden beneath carapace). In males, endopod of second pair of pleopods (abdominal appendages) with appendix masculina, appendix
interna, and lateral projection. The pleopods 3rd and 4th
divided into two branches. Atleast a pair of lateral spines(fixed) present in
the telson. Have to fill the species character.
not overarching scaphocerite, with its tip bidentate. The dorsal carina of the
carapace bears 5-8 teeth, with posterior 4 or 5, large and strong. One tooth is
present on the ventral side of the rostrum. The hepatic spine is strong and
well developed. Infraorbital lobe is rounded or slightly biangular. A blunt
spine like out-growth is present behind the hepatic spine. The scaphocerite is
triangular and with the disto-lateral tooth overreaching the lamella. The third
maxillipeds are strong and reach beyond the tip of the scaphocerite. Process of
distal ventrolateral lobes of petasma stretched transversely. Thelycum with
rear part considerably enlarged. The dorsal tooth of first abdominal segment
well developed, tip pointing upwards. The tooth of the second abdominal segment
well developed, strong and acute. The anterior three abdominal segments are
usually with single spine on the postero-ventral margin, whereas the fourth has
three spines and fifth with two spines.
economic importance; not abundant.
Original description : Crosnier, A., 2003. Sicyonia (Crustacea,
Decapoda, Penaeoidea, Sicyoniidae) de l’indo-ouest Pacifique.— Zoosystema 25: