Tetreres oscari Chávez-López 2022, sp. nov.

• Main Author: Chávez-López, Yessica
• Format: Other/Unknown Material
• Language: unknown
• Published: 2022
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Sabellida; Sabellariidae; Tetreres; Tetreres oscari; North Atlantic
• Online Access: https://zenodo.org/record/6885940; https://doi.org/10.5281/zenodo.6885940

Tetreres oscari sp. nov. urn:lsid:zoobank.org:act: 080B2BD8-DA8B-4E30-B51C-AC79F6ED37DA Figs 20–21 Diagnosis Outer paleae oblong, compressed with acute tips. Inner paleae slightly oblong, smooth, with blunt tips. Five tentacular filaments. First thoracic segment with a pair of long tapered cirri. Etymology This species name is after my brother Oscar Chávez-López. It is a noun in the genitive case (ICZN 1999, Art. 31.1.2). Material examined Holotype FLORIDA STRAIT • complete spec.; southwest of Marquesas Keys; RV Gerda, stn 968; 24°17′ N, 82°34′ W; depth 378 m; 2 Feb. 1968; UMML-22.1197. Paratypes FLORIDA • 1 spec.; southeastern Miami; RV Gerda, stn 265; 25°40′ N, 80°00′ W; depth 332 m; 28 Mar. 1964; UMML-22.1198 • 1 spec. (body fragmented in two parts after the operculum); same collection data as for preceding; ECOSUR-305. Additional material NORTH ATLANTIC – Florida Strait • 1 dry spec.; southeastern Key West; RV Gerda, stn 15; 25°05′ N, 80°00′ W; depth 288 m; 30 May 1962; UMML-22.1199. Description BODY. Holotype complete (UMML-22.1197) 12 mm long, 0.5 mm wide, four parathoracic segments, 22 abdominal segments, 4 mm caudal peduncle (Fig. 20). OPERCULUM. Opercular disc oblique (Fig. 20A–B, F). Outer paleae arranged in semicircles, 22 paleae on each lobe (Fig. 20F). Inner paleae in short ventral line on each inner margin of opercular lobes, three paleae on each lobe (Fig. 20F). Outer paleae pale yellow, oblong, compressed, 1 mm long. Blade three times as long as wide, with thecae transverse, compact; tips acute (Fig. 21A–B). Inner paleae pale yellow, slightly oblong, smooth, tips blunt (Fig. 21C–D). Opercular stalk pale yellow, three times as long as wide (Fig. 20B–D). Opercular papillae in one row peripheral to outer paleae, 11 papillae on each lobe. Papillae conical and tapered, 3–4 times as long as wide (Fig. 20F). One pair of yellow nuchal hooks, long, robust, with short limbation, tips falcate (Figs 20B, 21E–G). In lateral view, nuchal hook distally curved at angle of ~135° (Fig. 21E). Palps pale yellow, ...