053800), with body cream to light tan, from time to time greyish (Fig. 5A, B053800),

053800), with body cream to light tan, from time to time greyish (Fig. 5A, B
053800), with body cream to light tan, from time to time greyish (Fig. 5A, B). First six segments smooth using a few minute cuticular papillae broadly and evenly spaced. Remaining segments a lot more papillate and opaque in appearance. Segments seven and eight slightly much more opaque and dense than preceding ones, with stout cuticular papillae particularly near genital papillae, some cuticular papillae with modest PubMed ID:https://www.ncbi.nlm.nih.gov/pubmed/11836068 grains of sediment adhered to bases. Physique 5.5 mm long, 5.0 mm wide (other specimens as much as 22 mm extended, 7 mm wide), about 29 segments. Prostomium hemispherical, opalescent, translucent, at times with crescent shaped red eyespots laterally on smaller individuals (Fig. 5C, insert). Peristomium round, with out papillae. Mouth oval, covered by papillae, extending from base of prostomium to anterior edge of second segment. Very first 3 chaetigers with 84 light bronze, extensively separated, slightly falcate introvert hooks per bundle, each with subdistal dark areas (Fig. 5C). Genital papillae protrude ventrolaterally from intersegmental groove between segments 7 and 8. Preshield region with 7 segments, with papillae evenly spaced, slightly denser than on anterior segments, while significantly less so ventrally, and in single rows of clusters of short filaments closer to ventrocaudal shield, specifically on dorsal surface, hardly ever displaying delicate short capillary chaetae protruding laterally from body wall. Ventrocaudal shield with concentric lines, slightly ribbed; suture extended throughout shield (restricted for the anterior region in bigger specimens). Anterior margins rounded; anterior depression deep; anterior keels not exposed (Figs B, two, 5B, D). Lateral margins gently rounded (straighter in bigger specimens), not expanding posteriorly. Fan truncate, almost straight in juveniles, in some cases with MedChemExpress Sinensetin median notch, becoming crenulated in larger specimens. Marginal chaetal fascicles include 0 lateral ones (Fig. 5E), chaetae ovally arranged, and 5 posterior fascicles, chaetae in a linear arrangement. Peg chaetae on conical extensions emerging below most prominent oblique rib of the shield. Peg chaetae with stout base in cross section; a small fascicle of delicate capillary chaetae (pegassociated capillary chaetae) involving peg chaetae and initially fascicle of posterior chaetae. Branchiae several, thick, coiled, slender, lengthy, protruding from two oval plates, separated by a wide angle, on either side of anus. Added fine, long filamentous papillae extending to lateral and posterior margins of shield.Revision of Sternaspis Otto, 82 (Polychaeta, Sternaspidae)Figure five. Sternaspis affinis Stimpson, 864, neotype (RBCM 0053800) A Dorsal view B Ventral view C Anterior end, frontal view (insert: juvenile, prostomium with eyes) D Ventrocaudal shield, frontal view e Posterior area, lateral view. Bars: A mm B . mm C 0.8 mm D 0.6 mm E 0.7 mm.Neotype locality. British Columbia, Canada, Strait of Georgia. Remarks. It appears that S. affinis has not been reported since 875. Having said that, numerous collections hold specimens collected over the final hundred years of what appears to become the only species present along the northeast Pacific coast of North America, in the Beaufort Sea to California, and in to the Gulf of California. These have already been labelled either as S. scutata or S. fossor. The original description by Stimpson is brief and only includes a scant comparison on the cuticle with all the Atlantic species, S. fossor. As Stimpson’s description agrees together with the characters from the specimens located alo.