Aged; integument removed from numerous body regions; ventrocaudal shield previously removed.
Aged; integument removed from many Naringin physique regions; ventrocaudal shield previously removed. Introvert with out integument over the very first chaetigers, abdomen with integument and body wall broken laterally. Body papillae difficult to establish because of the poor condition PubMed ID:https://www.ncbi.nlm.nih.gov/pubmed/18686015 of holotype (Fig. 2A). Physique eight mm lengthy, five mm wide, about 29 segments. Prostomium hemispherical, opaque, tan in colour. Peristomium rounded, slightly raised at position of your mouth, without having papillae. Mouth oval, covered by papillae, extends from anterior edge of segment 
two virtually to prostomium (Fig. 2B). Initially three chaetigers with about six to ten huge, and five or more smaller, bronze, extensively separated, slightly falcate hooks; every with subdistal darker location (Fig. 2A, B). Genital papillae flattened, brief protrude ventrally from intersegmental groove amongst segments 7 and eight. Preshield area with 7 segments, without the need of fine capillary chaetae. Ventrocaudal shield previously removed, broken into three pieces; surface pale brown; ribs barely visible, concentric lines visible; suture most likely indistinct (Fig. 2C). Anterior margins rounded; anterior depression shallow; anterior keels in all probability not exposed. Lateral margins medially expanded, lowered posteriorly. Fan truncate, margin crenulated, median notch shallow, or indistinct (shield plates previously separated). Marginal shield chaetal fascicles involve ten lateral ones, chaetal pattern unknown, and five posterior fascicles, chaetal pattern unknown. Peg chaetae quick, having a broad base in cross section, emerge from cuticle on a slightly raised mound. More chaetae delicate, among peg chaetae and very first bundle of posterior chaetae. Branchiae lost; nature of branchial plates not determined. Remarks. The holotype is in poor situation with most of the cuticle missing, exposing the musculature under. It truly is a sizable specimen which exaggerates a few of the functions for example those of the shield and colouring from the introvert hooks. Caullery reported six chaetal fascicles in total with 8 located posteriorly; nonetheless, because the shield was separated, it appears he counted the groups of chaetae as they appeared under the shield. Additional it would happen to be tough to establish properly regardless of whether the delicate fine group is a part of posterior or lateral fascicles. The shield of S.rietschi features a posterior margin straight, at exact same level as margin of shield resembling S. princeps, S. spinosa, S. thalassemoides and S. thorsoni sp. n. As indicated above, S. spinosa differs in the other folks in that its shield is considerably wider than lengthy and by getting exposed its anterior keels. Additional, S. thorsoni has far more abundant, strawcoloured, delicate introvert hooks, whereas the remaining species have fewer, thicker, darker hooks. Also, there are actually no concentric lines on the shield of S. princeps in contrast to S. thalassemoides and S. rietschi. These two species differ since in S. rietschi the shield lateral margins are rounded, markedly expanded medially, whereas in S. thalassemoides they are rather straight, not markedly expanded medially. Distribution. Only recognized from the kind locality, off Wokam Island, Indonesia, in about 788 m depth.Kelly Sendall Sergio I. SalazarVallejo ZooKeys 286: four (203)Figure two. Sternaspis rietschi Caullery, 944, holotype (ZMA 500) A Total specimen, oblique, lateral view (insert: hooks from chaetiger 3) B Very same, anterior finish, frontal view C Ventrocaudal shield, pieces previously broken, frontal view. Body up to 35 mm extended, 8 m.