A new species and nine new records of Syllidae (Annelida) from the Socotra Archipelago (Indian Ocean) Author Rodríguez, Yolanda Lucas Author Martín, Guillermo San Author Fiege, Dieter text Zootaxa 2019 2019-08-05 4651 2 235 258 journal article 26091 10.11646/zootaxa.4651.2.2 1184b85a-5699-4722-968e-58834f3c1273 1175-5326 3363175 A90D52DC-727E-4723-B205-47B3C4F0C3A7 Myrianida pachycera ( Augener, 1913 ) Autolytus pachycerus Augener, 1913: 257–260 , pl. 2, fig. 11, 12, text-fig. 40A–C; 1927: 157–158.— Nygren & Sundberg 2003 : GenBank sequences, 16S rDNA partial sequence AF474258 , and 18S rDNA partial sequence AF474304 . Myrianida pachycera Imajima 1966b: 79–82 , fig. 26A–L.— Imajima 1967: 417 . Myrianida pachycerus Hartman 1966: 362–363 , fig. 1A–B. Autolytus purpureimaculata Okada 1933: 332–338 , figs. 6–11; 1937.— Imajima & Hartman 1964: 100 . Myrianida crassicirrata Hartmann-Schröder, 1965: 119–121 , figs. 47–49. Material examined. Socotra , Samhah Island , intertidal, amongst algae, 12º10’99N / 53º04’23E , algae, 07.04.2000 , 1 specimen ( SMF 24995) . Remarks. One female specimen with 28 segments up to beginning of the stolons, 3.8 mm long, 0.64 mm wide, yellowish coloration, cirri with same length along the body up to formation of stolon. A line of five stolons attached in different stages of maturation. Specimen very fragile. Four red eyes arranged in open trapezoidal arrangement. Nuchal epaulettes not visible. Palps fused along all their length. No ciliation observed in dorsal view. Median antenna thick, flat reaching almost chaetiger 10. Lateral antennae and ventral tentacular cirri 1/2 length of median antenna. Lateral antennae and tentacular cirri cylindrical, annulated. Almost all cirri lost on left side. First dorsal cirri similar in length to lateral antennae. Second dorsal cirri ¾ length of median antenna, thick and flat. Cirri 3 to 8 alternate in length short/long and in thick/flat shape. Schizogamous reproduction by gemmiparity, behind either chaetiger 31 or 34 ( Nygren, 2004 ). Habitat. Intertidal, shallow depths, together with rich epifauna ( Nygren, 2004 ); in Socotra also amongst algae. Distribution. East Indian Ocean, Pacific, West Atlantic. Australia , Japan , Hawaii, California, Florida ( Nygren, 2004 ).