Nd the posterior corners. Sternaspis costata is exclusive amongst the species
Nd the posterior corners. Sternaspis costata is one of a kind amongst the species within the genus mainly because its shield fan is reduced along its median line, particularly in bigger specimens, such that the lateral fan portions are longer, reaching the posterior corners, however the median portion is very quick, as if having 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 you will discover some subtle differences. For that reason, we are doubtful regarding 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) Type material. Northwestern Atlantic Ocean, Canada. Neotype (USNM 5543), 88 km E Cape Sable, Nova Scotia, 53 m, mud, six Oct. 909, O. Bryant, coll. More 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. 4 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) comprehensive, most physique SBI-0640756 supplier papillae eroded but transverse rows still noticeable; introvert exposed (Fig. 9C); 9.7 mm long, three.five mm wide, 3 segments. Body colour in alcohol generally tan to light brown, in some cases ashen or cinereous (Fig. 9A, C). Cuticular papillae evenly distributed over the majority of the body in particular posteriorly, beginning at segment eight. Single transverse dorsal rows of clusters of papillae per segment, specially towards posterior finish. Very first seven segments commonly substantially cleaner and translucent, especially in smaller sized folks. Physique as much as five mm lengthy, 
8 mm wide, about three segments.Revision of Sternaspis Otto, 82 (Polychaeta, Sternaspidae)Figure 9. Sternaspis fossor Stimpson, 853 A Juvenile (HMCS 9953670), anterior end exposed, ventral view B An additional specimen (HMCS 995367), ventrocaudal shield, frontal view C Neotype (USNM 5543), anterior finish exposed, ventral view D Very 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.eight mm D 0.7 mm G .two mm.Prostomium hemispherical, opalescent, without eyespots, minutely granular in look. Peristomium rounded, devoid of papillae, slightly raised close to mouth. Mouth slightly oval, entirely covered by papillae, extends from prostomium almost to edge of segment 2. Very first three chaetigers with 62 bronze, extensively separated, slightly falcate hooks per ramus, with subdistal dark areas, transparent in juveniles, opaque in larger specimens (Fig. 9C). Genital papillae protrude ventrally from intersegmental groove involving segments 7 and 8. Preshield area with 7 segments, with smaller, brief fascicles of fine ca.
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