Method (Fig. H). Colour white, slightly opalescent, dirty white on posterior
Approach (Fig. H). Colour white, slightly opalescent, dirty white on posterior segments. Cuticle covered by minute papillae, in HA15 particular on segments seven and eight as well as the segments close to ventrocaudal shield. Body as much as 29 mm long, mm wide, 30 segments.Kelly Sendall Sergio I. PubMed ID:https://www.ncbi.nlm.nih.gov/pubmed/18686015 SalazarVallejo ZooKeys 286: 4 (203)Prostomium hemispherical, opalescent, light yellow in colour. Peristomium rounded, raised at position of mouth and with out papillae. Mouth oval, covered by minute papillae, extends from edge of second segment halfway to the border of prostomium. First three chaetigers with about 05 bronze, extensively separated, slightly falcate introvert hooks, every single with subdistal, narrow dark places. Genital papillae protrude ventrally from intersegmental groove amongst segments 7 and eight (Fig. I). Preshield area with 7 segments, in some cases with row of little, short fascicles of fine capillary chaetae, barely protruding from physique wall laterally. Ventrocaudal shield surface just about flat. Shield surface faintly ribbed with one particular larger oblique rib; suture indistinct, barely defined anteriorly, poorly defined posteriorly (Fig. I); larger syntype with faint concentric lines, smaller sized person with far more distinct concentric lines. Anterior margins rounded; anterior depression deep; anterior keels not exposed. Lateral margins straight, barely expanded posteriorly. Fan truncate, margin crenulated, with shallow median notch. Marginal chaetal fascicles incorporate ten lateral ones, and six posterior fascicles; all chaetae broken on both syntypes, except for first two lateral fascicles. Peg chaetae present as stubs. More chaetae broken. Branchiae lost; branchial plates visible, oriented close to parallel with respect to every other. Remarks. Selenka (885) indicated a shallow furrow operating along the middle in the ventral surface, dividing each and every half into a larger anterior triangle and a smaller posterior triangle. While he did not indicate this specifically, he was almost certainly referring towards the anterolateral and posterior portions on the shield. He also counted 40 tufts of chaetae along the margins in the shield. In the event the secondary groups of chaetae, including the delicate fascicles at the posterolateral edges are incorporated, you can find nonetheless only 34. Mainly because a single syntype is extremely substantial, and chaetal fascicles may perhaps be irregularly broken, he may possibly have inadvertently counted a number of from the fascicles more than when. There are five species possessing shields with straight posterior margins: S. princeps, S. rietschi, S. spinosa, S. thalassemoides and S. thorsoni sp. n. Sternaspis princeps is most similar to S. thalassemoides since both have deep anterior depressions and rounded anterior margins. Nevertheless, they differ mainly because in S. princeps only the bigger, radial rib is far more or much less visible, but concentric lines are certainly not, whereas in S. thalassemoides the shield has radial ribs and concentric lines. An added difference is the fact that in S. princeps the shield anterior keels are exposed whereas they are covered in S. thalassemoides. Distribution. Only known from the kind locality, off North Island, New Zealand, about 274 m depth. Sternaspis rietschi Caullery, 944 http:speciesid.netwikiSternaspis_rietschi Figure 2 Sternaspis rietschi Caullery, 944:680, fig. 54a ; Bleeker and van der Spoel 992:59.Revision of Sternaspis Otto, 82 (Polychaeta, Sternaspidae)Variety material. Indonesia. Holotype (ZMA 500), west of Wokam Island, 56’S, 340’E, 788 m, 899900, Stn. 27. Description. Holotype (ZMA 500) dam.