Myrianida pachycera ( Augener, 1913 )

Rodríguez, Yolanda Lucas, Martín, Guillermo San & Fiege, Dieter, 2019, A new species and nine new records of Syllidae (Annelida) from the Socotra Archipelago (Indian Ocean), Zootaxa 4651 (2), pp. 235-258 : 253-254

publication ID	https://doi.org/ 10.11646/zootaxa.4651.2.2
publication LSID	lsid:zoobank.org:pub:A90D52DC-727E-4723-B205-47B3C4F0C3A7
DOI	https://doi.org/10.5281/zenodo.5241250
persistent identifier	https://treatment.plazi.org/id/03F187B1-FFE2-243F-FF6F-A308FF3BFDA0
treatment provided by	Plazi
scientific name	Myrianida pachycera ( Augener, 1913 )
status

Treatment

Myrianida pachycera ( Augener, 1913) View in CoL

Autolytus pachycerus Augener, 1913: 257–260 View in CoL , pl. 2, fig. 11, 12, text-fig. 40A–C; 1927: 157–158.— Nygren & Sundberg 2003: GenBank sequences, 16S rDNA partial sequence AF474258 View Materials , and 18S rDNA partial sequence AF474304 View Materials .

Myrianida pachycera Imajima 1966b: 79–82 View in CoL , fig. 26A–L.— Imajima 1967: 417.

Myrianida pachycerus Hartman 1966: 362–363 View in CoL , fig. 1A–B.

Autolytus purpureimaculata Okada 1933: 332–338 View in CoL , figs. 6–11; 1937.— Imajima & Hartman 1964: 100.

Myrianida crassicirrata Hartmann-Schröder, 1965: 119–121 View in CoL , 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).