Sternaspis princeps (Sendall, Kelly & Salazar-Vallejo, Sergio I. 2013)
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- Sternaspis princeps Sendall, Kelly, 2013, ZooKeys 286: 39-40.
Description. Syntypes (NHM 18188.8.131.52) body smooth, except for longitudinal wrinkles starting on segment eight, probably an artefact of fixation and/or preservation process (Fig. 11H). Colour white, slightly opalescent, dirty white on posterior segments. Cuticle covered by minute papillae, especially on segments seven and eight and the segments near ventro-caudal shield. Body up to 29 mm long, 11 mm wide, 30 segments. Prostomium hemispherical, opalescent, light yellow in colour. Peristomium rounded, raised at position of mouth and without papillae. Mouth oval, covered by minute papillae, extends from edge of second segment halfway to the border of prostomium. First three chaetigers with about 10-15 bronze, widely separated, slightly falcate introvert hooks, each with subdistal, narrow dark areas. Genital papillae protrude ventrally from intersegmental groove between segments 7 and 8 (Fig. 11I). Pre-shield region with 7 segments, sometimes with row of small, short fascicles of fine capillary chaetae, barely protruding from body wall laterally. Ventro-caudal shield surface almost flat. Shield surface faintly ribbed with one larger oblique rib; suture indistinct, barely defined anteriorly, poorly defined posteriorly (Fig. 11I); larger syntype with faint concentric lines, smaller individual with more distinct concentric lines. Anterior margins rounded; anterior depression deep; anterior keels not exposed. Lateral margins straight, barely expanded posteriorly. Fan truncate, margin crenulated, with shallow median notch. Marginal chaetal fascicles include ten lateral ones, and six posterior fascicles; all chaetae broken on both syntypes, except for first two lateral fascicles. Peg chaetae present as stubs. Additional chaetae damaged. Branchiae lost; branchial plates visible, oriented close to parallel with respect to each other.
Distribution. Only known from the type locality, off North Island, New Zealand, about 1274 m depth.