Burukovsky R.N. 2011. Parastylodactylus matsuzawai sp.n. (Caridea: Stylodactylidae), a new shrimp from Japanese waters // Invertebrate Zoology. Vol.8. No.2: 115–119 [in English].

Kaliningrad State Technical University, Kaliningrad 236000, Russia; e-mail: burukovsky@klgtu.ru

KEY WORDS: Parastylodactylus matsuzawai sp.n., new species, Japan.

ABSTRACT: Parastylodactylus matsuzawai sp.n., is described from Japanese waters and is close to P. semblatae Cleva, 1990. Both species feature rounded pleura of abdominal somites, a tiny supraorbital spine, and five pairs of dorsal spines on telson. It differs from P. semblatae by the armature of the dorsal side of the rostrum (30–39 spines in P. semblatae vs. 23 in P. matsuzawai sp.n.), by the length of the antennular peduncles (1/3 of scaphocerite length in P. semblatae vs. 1/2 in P. matsuzawai sp.n.), as well as by the morphology and armature of the pereiopods 3–5. In P. semblatae the ischio-meral suture is only present in pereipods 5, while in P. matsuzawai sp.n. it is present in pereiopods 4 and 5. P. matsuzawai sp.n. lacks a proximal spine on the ischiomerus of the 3rd pereipods, which are armed with a single subdistal spine; the ischiomera of 4th pereiopods have 3 spines, those of 5th pereiopods 2 spines (subdistal and median), whereas P. semblatae has only one subdistal spine on the 4th pereiopods and 3 spines in the distal Ѕ of ischiomerus of the 5th pereiopods. The new species is also more reddish than P. semblatae.

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