Aged; integument removed from various body regions; ventrocaudal shield previously removed.
Aged; integument removed from a number of physique regions; ventrocaudal shield previously removed. Introvert without having integument more than the very first chaetigers, abdomen with integument and physique wall broken laterally. Body papillae hard to ascertain on account of the poor situation PubMed ID:https://www.ncbi.nlm.nih.gov/pubmed/18686015 of holotype (Fig. 2A). Physique 8 mm extended, 5 mm wide, about 29 segments. Prostomium hemispherical, opaque, tan in colour. Peristomium rounded, slightly raised at position of the mouth, without papillae. Mouth oval, covered by papillae, extends from anterior edge of segment 2 practically to prostomium (Fig. 2B). Initially three chaetigers with about six to ten large, and five or far more smaller sized, bronze, widely separated, slightly falcate hooks; each with subdistal darker location (Fig. 2A, B). Genital papillae flattened, short protrude ventrally from intersegmental groove in between segments 7 and 8. Preshield region 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 probably indistinct (Fig. 2C). Anterior margins rounded; anterior depression shallow; anterior keels likely not exposed. Lateral margins medially expanded, reduced posteriorly. Fan truncate, margin crenulated, median notch shallow, or indistinct (shield plates 
previously separated). Marginal shield chaetal fascicles incorporate ten lateral ones, chaetal pattern unknown, and 5 posterior fascicles, chaetal pattern unknown. Peg chaetae quick, having a broad base in cross section, emerge from cuticle on a slightly raised mound. Added chaetae delicate, amongst peg chaetae and initially bundle of posterior chaetae. Branchiae lost; nature of branchial plates not determined. Remarks. The holotype is in poor condition with most of the cuticle missing, exposing the musculature under. It really is a sizable specimen which exaggerates a few of the attributes which include these from the shield and colouring of your introvert hooks. Caullery reported six chaetal fascicles in total with 8 located posteriorly; on the other hand, because the shield was separated, it seems he counted the groups of chaetae as they appeared below the shield. Further it would have been hard to determine properly whether the delicate fine group is part of posterior or lateral fascicles. The shield of S.rietschi includes 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 others in that its shield is a great deal wider than long and by obtaining exposed its anterior keels. Further, S. thorsoni has more abundant, strawcoloured, delicate introvert hooks, whereas the remaining species have fewer, thicker, darker hooks. Also, you will find no concentric lines on the shield of S. princeps in contrast to S. thalassemoides and S. rietschi. These two species differ simply because in S. rietschi the shield lateral margins are rounded, markedly Endoxifen (E-isomer hydrochloride) chemical information expanded medially, whereas in S. thalassemoides they’re rather straight, not markedly expanded medially. Distribution. Only identified from the kind locality, off Wokam Island, Indonesia, in about 788 m depth.Kelly Sendall Sergio I. SalazarVallejo ZooKeys 286: 4 (203)Figure two. Sternaspis rietschi Caullery, 944, holotype (ZMA 500) A Comprehensive specimen, oblique, lateral view (insert: hooks from chaetiger three) B Identical, anterior end, frontal view C Ventrocaudal shield, pieces previously broken, frontal view. Body up to 35 mm lengthy, eight m.
