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

053800), with physique cream to light tan, from time to time greyish (Fig. 5A, B
053800), with body cream to light tan, occasionally greyish (Fig. 5A, B). First six segments smooth using a couple of minute cuticular papillae extensively and evenly spaced. Remaining segments far more papillate and opaque in look. Segments seven and eight slightly a lot more opaque and dense than preceding ones, with stout cuticular papillae specifically close to genital papillae, some cuticular papillae with compact PubMed ID:https://www.ncbi.nlm.nih.gov/pubmed/11836068 grains of sediment adhered to bases. Body 5.five mm lengthy, five.0 mm wide (other specimens up to 22 mm extended, 7 mm wide), about 29 segments. Prostomium hemispherical, opalescent, translucent, often with crescent shaped red eyespots laterally on smaller individuals (Fig. 5C, insert). Peristomium round, devoid of 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, broadly separated, slightly falcate introvert hooks per bundle, each and every with subdistal dark regions (Fig. 5C). Genital papillae protrude ventrolaterally from intersegmental groove involving segments 7 and eight. Preshield area with 7 segments, with papillae evenly spaced, slightly denser than on anterior segments, though much less so ventrally, and in single rows of clusters of quick filaments closer to ventrocaudal shield, especially on dorsal surface, rarely displaying delicate short capillary chaetae protruding laterally from physique wall. Ventrocaudal shield with concentric lines, slightly ribbed; suture extended throughout shield (restricted towards the anterior area in bigger specimens). Anterior margins rounded; anterior depression deep; anterior keels not exposed (Figs B, two, 5B, D). Lateral margins gently rounded (straighter in larger specimens), not expanding posteriorly. Fan truncate, pretty much straight in juveniles, from time to time with median notch, becoming crenulated in larger specimens. Marginal chaetal fascicles involve 0 lateral ones (Fig. 5E), chaetae ovally arranged, and five posterior fascicles, chaetae in a linear arrangement. Peg chaetae on conical extensions emerging under most prominent oblique rib in the shield. Peg chaetae with stout base in cross section; a smaller fascicle of delicate capillary chaetae (pegassociated capillary chaetae) amongst peg chaetae and first fascicle of posterior chaetae. Branchiae many, thick, coiled, slender, lengthy, protruding from two oval plates, separated by a wide angle, on either side of anus. More fine, lengthy filamentous papillae extending to lateral and posterior margins of shield.Revision of Sternaspis Otto, 82 (MedChemExpress AN3199 Polychaeta, Sternaspidae)Figure 5. 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 seems that S. affinis has not been reported given that 875. Having said that, lots of collections hold specimens collected more than the final hundred years of what seems 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 been labelled either as S. scutata or S. fossor. The original description by Stimpson is short and only contains a scant comparison with the cuticle together with the Atlantic species, S. fossor. As Stimpson’s description agrees together with the characters with the specimens discovered alo.