Identities of three taxa of the hippolytid shrimp genus Heptacarpus (Crustacea: Decapoda: Caridea), with description of a new species from East Asian waters Author Komai, Tomoyuki Author Ivanov, Boris G. text Zootaxa 2008 1684 1 34 journal article 50109 10.5281/zenodo.180453 62cb965f-2144-4449-8276-e61141e7a041 1175-5326 180453

TABLE 5. Summary of major morphological differences among four species of Heptacarpus.

Characters	H. camtschaticus	H. acuticarina- tus n. sp.	H. geniculatus	H. longirostris
RL/CL Female Male	1.09–1.37 1.24–1.42	1.22–1.53 1.42–1.57	1.11–1.57 1.33–1.57	1.03–1.39 0.97–1.13
Unarmed part of dorsal margin of rostrum	0.28–0.57	0.16–0.28	0.40–0.72	0.40–0.74
Ventral margin of rostrum	usually with 3–6 teeth	with 5–8 teeth	usually with 6–9 teeth	with 4–7 teeth
Rostral lateral carina	blunt	sharp	blunt	blunt
Pterygostomial tooth	variable	always present	variable	usually present
Third pleonal tergite	convex posteriorly, making pleon weakly gibbous	slightly convex	strongly elevated pos- teriorly, making pleon notably gibbous	evenly convex, making pleon weakly gibbous
Fifth pleonal pleuron	with posteroventral tooth	with posteroven- tral tooth	with posteroventral tooth	unarmed
Antennal scale length/ width	3.40–4.00	3.30–3.70	5.50–6.00	3.90–4.50
Length of third maxilliped	reaching distal 0.30– 0.40 of antennal scale	reaching distal 0.15–0.30 of antennal scale	not reaching midlength of antennal scale	not reaching midlength of antennal scale
Number of ungues of first pereopod (dactylus+fixed finger)	2+1	2+1	2+1	3+3
Extension of third pereo- pod (by tip of propodus)	reaching distal 0.20– 0.30 of antennal scale	nearly reaching distal margin of antennal scale	falling short of midlength of antennal scale	falling short of midlength of antennal scale
Meral spines on third pere- opod	usually 3–5	7–10	5–8	2–4