Parasabella pallida Moore, 1923

Yanez-Rivera, Beatriz, Tovar-Hernandez, Maria Ana, Galvan-Villa, Cristian Moises & Rios-Jara, Eduardo, 2020, Tubicolous polychaete worms (Annelida) from Bahia de Chamela Islands Sanctuary, Mexico, with the description of a new bamboo worm, Biodiversity Data Journal 8, pp. 57572-57572 : 57572

Parasabella pallida Moore, 1923

Parasabella pallida in Moore 1923: 241, 242.- Loi 1980: 144.- Bastida-Zavala et al. 2016: 407-408, figs. 2, 10D.- Tovar-Hernández et al. 2019: 5, fig. 2B.

Sabella media .- Hartman 1944b: 285 [in part, not pl. 23, fig. 42].

Demonax medius .- Hartman 1969: 675, 676 [in part, not figs. 1-5].

Demonax pallidus .- Perkins 1984: 313-315, figs. 15-16.- Tovar-Hernández et al. 2009: 325-326, figs. 2b, f, 3c-d, 4c-e.

Materials

Type status: Other material. Occurrence: catalogNumber: LEMA-PO167 ; recordedBy: Beatriz Yáñez-Rivera; individualCount: 1; Taxon: phylum: Annelida; class: Polychaeta; order: Sabellida; family: Sabellidae; genus: Parasabella; Location: higherGeographyID: Pacific Ocean; higherGeography: Tropical Eastern Pacific; continent: America; islandGroup: Islas de Chamela; island: Isla Cocinas; country: México; countryCode: MX; stateProvince: Jalisco; municipality: La Huerta; maximumDepthInMeters: 7; verbatimLatitude: 19°32 ’45’’ N; verbatimLongitude: 105°06 ’27’’ W; Identification: identifiedBy: María Ana Tovar-Hernández; Event: samplingProtocol: Scuba dive; eventDate: June 25, 2013; year: 2013; month: 6; day: 25; habitat: On rock-coral; fieldNumber: Site 15; Record Level: language: Spanish; institutionID: Universidad de Guadalajara; collectionID: Colección Biológica del Laboratorio de Ecosistemas Marinos y Acuicultura; institutionCode: UDG; collectionCode: LEMA

Description

Solitary fan worm with soft tubes, composed of fine sand and covered by algae and bryozoans. Body length 14-26 mm, 1.5-2.3 mm width. Radiolar crown length 6-10 mm with 12-14 pairs of radioles. Thorax with eight chaetigers and abdomen with 63-67 chaetigers. Radioles with brownish maculae (no eyes or ocelli) along radiolar length (Fig. 12 D-F). Radiolar tips with broad flanges. Ventral shields well developed, contacting tori. Ventral collar margin incised, forming two rounded lappets with triangular tips.

Taxon discussion

Members of Parasabella seem like Acromegalomma at first view, but the latter have subdistal compound eyes in radioles (absent in Parasabella ). Common in fouling from the Gulf of California ( Tovar-Hernández et al. 2009; Tovar-Hernández et al. 2019; Bastida-Zavala et al. 2016).

Figures

Figure 12. Notaulax californica (Treadwell, 1906) and Parasabella pallida Moore, 1923. Notaulax californica: A) crown and thorax, dorsal view, B) same, ventral view, C) radiolar ocelli. Parasabella pallida: D) crown, thorax and anterior abdomen, E-F) radiolar maculae. Scale bars: A-B, D) 2 mm, C, E-F) 0.3 mm.