Mediomastus californiensis Hartman 1944

• Main Authors: Magalhães, Wagner F., Bailey-Brock, Julie H.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Capitellidae; Mediomastus; Mediomastus californiensis; Ewing; Snug Harbor; Mamala; Ford Island
• Online Access: https://zenodo.org/record/6175617; https://doi.org/10.5281/zenodo.6175617

Mediomastus californiensis Hartman, 1944 Figures 18 A–B, 19 A–D, 20 A–B Mediomastus californiensis Hartman, 1944: 264 –265, pl. 26, figs. 64–65. Mediomastus californiensis.— Hartman 1947: 408, pl. 46, figs. 3–4. Hartman 1969: 387–388, figs. 1–4. Ewing 1984: 14 – 14 to 14–16, figs. 14 –9, 14– 10 a–c. Warren et al. 1994: 239 –241, figs. 2 b, 7 c–d, 9 a–d, 12, tables 1–2. Blake 2000: 78 –79, fig. 4.12. Material examined. Oahu Island: Paiko Lagoon, Maunalua Bay, 21 ° 17 ʹ 2.9 ʺ N, 157 ° 43 ʹ 21.9 ʺ W, Jan. 1980, coll. J.H. Bailey-Brock (4); Honolulu Harbor, Naval Undersea Center, coll. R. Brock (7); Honolulu Harbor, 13 Nov. 1997, coll. R.C. DeFelice, 10–12 m, Pier 20 (1, BPBM R 2629; 1, BPBM R 2630), Pier 27 (2, BPBM R 2637), Pier 29 (6, BPBM R 2639), Pier 41, dry dock (2, BPBM R 2648), Sea-Land Pier (10, BPBM R 2663), Snug Harbor (5, BPBM R 2665). Pearl Harbor, abandoned pier, Ford Island, 18 Mar. 1993, coll. R. Brock (15, BPBM R 3605); Sta. 9.1.0, Sept. 1997 (3, BPBM R 3606); Pearl Harbor, Environmental Monitoring and Assessment Program (EMAP), State of Hawaii estuaries and bays, Oct. 2002: Sta. 67, 21° 22 ʹ 22.8 ʺ N, 157 ° 56 ʹ 9.6 ʺ W (17, BPBM R 3607); Sta. 11, Pearl Harbor, 21 ° 22 ʹ 19.2 ʺ N, 157 ° 59 ʹ 9.6 ʺ W (4, BPBM R 3608). North Kaneohe Bay, Dec. 1993 (4). Mamala Bay, Jan. 2001, Sta. 25 (3). Description. Complete specimens 22–34 mm long, 0.3–0.5 mm wide for 89–134 chaetigers. Body elongate, slender, widest on mid-thoracic chaetigers, tapering from abdomen to pygidium. Color in alcohol pale yellow. Prostomium short with rounded palpode (Figs 18 A, 19 A). Nuchal organs and eyespots not observed. Proboscis everted with numerous short papillae (Fig. 18 A). Peristomium achaetous, slightly longer than anterior thoracic chaetigers (Figs 18 A, 19 A). Thorax with 10 chaetigers; chaetigers 1–4 slightly expanded, each with shallow inter-segmental groove and bilimbate capillaries (Fig. 18 A). Thoracic chaetigers 5–10 biannulate, with deep inter-segmental grooves and hooded hooks (Fig. 19 C). Notopodia inserted ...