Serpula hartmanae Reish 1968

Serpula cf. hartmanae Reish, 1968 (Figures 11F–K) Serpula hartmanae Reish, 1968: 228–229, figs. 511–16. Type locality: Marshall Islands. Serpula hartmanae.— Imajima and ten Hove, 1984: 36–38, figs. 1a–d, Bikini, Truk, Ponape and Majuro Islands. Material examined. One specimen: Baja California (Mexico), LACM-AHF s.n. (28º52'55"N, 118º17'34"W, south-western tip of Isla Guadalupe, sta. 1519, H46–201, intertidal reef, Aug. 16, 1946, coll. C.L. Hubbs). Diagnosis. Tube white, rough, with two longitudinal ridges and one peristome (Figs 11H–I), lacks alveoli. Specimen missing left branchial lobe. Opercular peduncle smooth, white, with marked constriction. Operculum as a symmetrical funnel, deeper (operculum diameter equal to half its length); funnel with 18 radii with rounded tips (Figs 11F–G). Collar bayonet chaetae with two sharp-short teeth and three additional smaller teeth, distal blade smooth (Fig. 11J). Thorax with hooded (limbate) chaetae (Fig. 11K). Measurements. TL=22.5 mm, THL=2.0 mm, THW=0.6 mm, POL=5.3 mm, OL=1.2 mm, OD=0.6 mm, the radioles of right side are 18. Habitat. Depth: intertidal reef. Distribution. The nominal species is distributed in Western Pacific: Marshall Islands, Solomon Islands, Nouvelle Calédonie, Palau Islands, Truk Islands and Ponape Islands (Imajima & ten Hove 1984). Taxonomic remarks. The specimen agrees with the description of Serpula hartmanae, including the diagnostic bulbous end of the peduncle just below the constriction. Holotype and paratype (USNM 38400, 38401) have 21 and 18 radii respectively; while Imajima and ten Hove (1984) recorded opercula with 11–20 radii. The only difference between the specimen from Isla Guadalupe and tropical specimens of S. hartmanae is the shape of the distal section of the operculum that is not completely opened as in S. hartmanae, however, this maybe is an artefact of fixation. Serpula hartmanae live typically in coral reefs, while Isla Guadalupe is located in a temperate system, with strong upwellings and far from commercial routes of navigation.
Published as part of Bastida-Zavala, J. Rolando, 2008, Serpulids (Annelida: Polychaeta) from the Eastern Pacific, including a brief mention of Hawaiian serpulids, pp. 1-61 in Zootaxa 1722 on page 46
{"references":["Reish, D. J. (1968) The polychaetous annelids of the Marshall Islands. Pacific Science, 22, 208 - 231.","Imajima, M. & ten Hove, H. A. (1984) Serpulinae (Annelida, Polychaeta) from the Truk Islands, Ponape and Majuro Atoll, with some other new Indo-Pacific records. Proceedings of the Japanese Society Systematic Zoology, 27, 35 - 66."]}