Description of a new species, crangon handi, and new genus, lissocrangon, of crangonid shrimps (crustacea: caridea) from the california coast, with notes on adaptation in body shape and coloration

TLDR: Crangon handi is a specialist for shallow-water coarse sand substrates and here exhibits remarkable crypsis, and L. stylirostris are squat shrimps in restricted habitats probably adapted for short quic...

Abstract: 1. Crangon handi, new species. is described and compared with five other California crangonid shrimps; it occurs from the littoral zone to 55 m from Sonoma County to Bahia Colnett. northern Baja California. Crangon handi is a specialist for shallow-water coarse sand substrates and here exhibits remarkable crypsis. Crangon handi eats small gammarid amphipods and has in turn been found in the stomach of the thornback skate.2. Lissocrangon, new genus, is proposed to accomodate C. stylirostris, a species lacking gastric spination; Crangon is restricted to shrimp with one gastric spine; Steiracrangon Kinahan, is revived for shrimp with bicarinate sixth abdominal segments; and Neocrangon Zarenkov is revised and amended to include shrimp with two gastric spines and bicarinate sixth abdominal segments.3. Morphological analyses and relative growth are presented and discussed for all six crangonids considered. Crangon handi and L. stylirostris are squat shrimps in restricted habitats probably adapted for short quic...