Abstract
Two new species of Japanese Syllidae (Polychaeta) belonging to the genera Haplosyllis Langerhans, 1879 and Syllis Lamarck, 1818 are described. Haplosyllis crassicirrata n. sp. is characterized by its distinctly spindle-shaped thick dorsal cirri, with yellow granular inclusions, two unequal simple chaetae per parapodium, and the shape of the chaetae. Syllis marugani n. sp. is characterized by its distinct orange colour (in ethanol preserved specimens), long and broad dorsal cirri, compound chaetae having robust shafts in the posterior part of the body, and short blades strongly bidentate.
Highlights
The family Syllidae is one of the most diverse families comprising about 667 valid species and 55 genera (San Martín, 2003). It is a widely distributed group found from the intertidal zone to the abyssal plains all over the world (Pleijel, 2001; Glasby, 2000); yet they are more diversified and abundant in shallow waters (San Martín, 2003)
The specimens were found in two intertidal samples (M1 and M15), where M1 was collected on algal substrata in Manazuru Peninsula (35o10’22’’N, 130o41’E) and M15 collected on rocky shore in Yoshio, Katsuura City, Boso Peninsula (35o08’10’’N, 140o18’16’’E)
Description of the morphology of the largest chaetae of Haplosyllis crassicirrata n. sp. follows the terminology proposed by Martín et al (2003) for species of the genus Haplosyllis
Summary
The family Syllidae is one of the most diverse families comprising about 667 valid species and 55 genera (San Martín, 2003). It is a widely distributed group found from the intertidal zone to the abyssal plains all over the world (Pleijel, 2001; Glasby, 2000); yet they are more diversified and abundant in shallow waters (San Martín, 2003). Utinomi (1956) studied syllid commensals on gorgonaceans, and Imajima and Hartman (1964) published a monograph on the polychaetous annelids of Japan that included the family Syllidae. Syllids have been studied in Korea by Wui Lee and Jo Rho (1994), in China and surrounding areas by Jing and Baoling
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