Nd the posterior corners. Sternaspis costata is special among the species
Nd the posterior corners. Sternaspis costata is exclusive amongst the species inside the genus simply because its shield fan is decreased along its TCS-OX2-29 site median line, in particular in larger specimens, such that the lateral fan portions are longer, reaching the posterior corners, however the median portion is extremely brief, as if obtaining a wide, deep median notch. Distribution. Southern Sakhalin Island (Russia), Japan, and PubMed ID:https://www.ncbi.nlm.nih.gov/pubmed/11836068 the Philippines, 2070 m depth. The record for estuarine environments in India (Southern 92:6495, Pl. 20, fig. 5a, b) is questionable; the illustration resembles the species but there are some subtle differences. Therefore, we are doubtful in regards to the distribution extending to estuarine waters inside 
the Bay of Bengal. Sternaspis fossor Stimpson, 853, restricted http:speciesid.netwikiSternaspis_fossor Figures B, 9 Sternaspis fossor Stimpson, 853:29, fig. 9; Verrill 873:606, Pl. four, fig. 74; Webster and Benedict 884:725, 887:32; von Marenzeller 890:five, Pl. , fig. 4A ; Moore 909:44; Hartman 944:82, Pl. 33, fig. five; Hartman 965:92. Sternaspis scutata: Pettibone 954:3090, fig. 35 a, b (partim, non Ranzani 87) Variety material. Northwestern Atlantic Ocean, Canada. Neotype (USNM 5543), 88 km E Cape Sable, Nova Scotia, 53 m, mud, 6 Oct. 909, O. Bryant, coll. Additional material. Canada, Brunswick. spec. (HMCS 9953670), Bocabec Bay, 450’N, 672’W, 22 m, 20XII976. spec. (HMCS 995367), L’Etang Estuary, 454’30″N, 667’39″W, 20VIII975. 37 spec. (HMCS 9953672), Letite Passage, 453’N, 665’W, 73 m (in codfish stomach), 7V976. 5 spec. (HMCS 9953673), Passamaquoddy Bay, Loring Cove, 456’N, 669’W, 274 m, 22V973. 2 spec. (HMCS 9953676), Bocabec Bay, 450’N, 672’W, 3III977. spec. (HMCS 9953677), Passamaquoddy Bay (WolvesLepreau), 966. four spec. (USNM 7872), East of Grand Manan, 08 m, mud, 872. U.S.A. 3 spec. (ANSP 247), off Newport, Rhode Island. Description. Neotype (USNM 5543) full, most body papillae eroded but transverse rows still noticeable; introvert exposed (Fig. 9C); 9.7 mm long, 3.5 mm wide, 3 segments. Body colour in alcohol typically tan to light brown, in some cases ashen or cinereous (Fig. 9A, C). Cuticular papillae evenly distributed over many of the physique particularly posteriorly, beginning at segment eight. Single transverse dorsal rows of clusters of papillae per segment, especially towards posterior finish. First seven segments ordinarily a great deal cleaner and translucent, specifically in smaller sized individuals. Body up to 5 mm extended, 8 mm wide, about three segments.Revision of Sternaspis Otto, 82 (Polychaeta, Sternaspidae)Figure 9. Sternaspis fossor Stimpson, 853 A Juvenile (HMCS 9953670), anterior finish exposed, ventral view B Yet another specimen (HMCS 995367), ventrocaudal shield, frontal view C Neotype (USNM 5543), anterior finish exposed, ventral view D Same, ventrocaudal shield, frontal view e Ventrocaudal shields of three other specimens (USNM 7872). Bars: A, F mm B 0.six mm C, E 0.8 mm D 0.7 mm G .two mm.Prostomium hemispherical, opalescent, without eyespots, minutely granular in appearance. Peristomium rounded, with no papillae, slightly raised close to mouth. Mouth slightly oval, totally covered by papillae, extends from prostomium practically to edge of segment two. Initially 3 chaetigers with 62 bronze, widely separated, slightly falcate hooks per ramus, with subdistal dark locations, transparent in juveniles, opaque in larger specimens (Fig. 9C). Genital papillae protrude ventrally from intersegmental groove among segments 7 and eight. Preshield region with 7 segments, with small, short fascicles of fine ca.