Notodasus harrisae García-Garza, Hernández-Valdez & León-González, 2009

Magalhães, Wagner F. & Bailey-Brock, Julie H., 2012, Capitellidae Grube, 1862 (Annelida: Polychaeta) from the Hawaiian Islands with description of two new species, Zootaxa 3581, pp. 1-52 : 32-33

Notodasus harrisae García-Garza, Hernández-Valdez & León-González, 2009

Figures 23 A–D, 25 A–B

Notodasus harrisae García-Garza, Hernández-Valdez & León-González, 2009: 814 –815, figs 3a–d, 8c.

Material examined. Oahu Island: Waianae outfall, Sta. ZR3, 21°25ʹ22.9ʺ N, 158°11ʹ51.1ʺ W, 35 m, May 2001 (1 on SEM stub).

Description. Only specimen collected incomplete, 26 mm long, 2.5 mm wide for about 65 chaetigers. Color in alcohol light brown.

Prostomium conical with short palpode; nuchal organs and eyespots not observed. Proboscis partly everted and papillated distally ( Fig. 23 A). Peristomium achaetous, biannulated dorsally and slightly longer than chaetiger 1 ( Fig. 23 A).

Thorax with 11 chaetigers ( Fig. 23 A); strongly tessellated from chaetigers 1–6, and biannulate with deep intersegmental grooves almost as deep as intra-segmental grooves ( Fig. 23 A). First chaetiger biramous and thorax with short bilimbate capillaries only ( Fig. 23 A). Notopodia inserted dorso-laterally and neuropodia laterally. Lateral organs present throughout, between noto- and neuropodia but closer to notopodia. Genital pores not observed.

Transition between thorax and abdomen marked by change in shape of segments only ( Fig. 23 B); first two abdominal segments biannulate with capillaries only and distinct superior neuropodial lobe ( Fig. 23 B); subsequent abdominal segments multiannulated with hooded hooks only. Abdominal noto- and neuropodia without well separated glandular tori pads ( Fig. 23 B). Anterior abdominal notopodial glandular tori pads fused and becoming further separates after first four chaetigers ( Fig. 23 B). Notopodia with about 60 hooded hooks per fascicle, neuropodia with about 150 hooks. Noto- and neuropodial hooks similar; hoods exposing only tip of main fang ( Fig.

23C). Hooks with long anterior shaft, angled node and multiple teeth; in frontal view with at least 3 rows with multiple teeth ( Fig. 23 D).

Branchiae not observed but reported to begin after chaetiger 60 in original description.

Methyl green staining pattern. Thorax and first two abdominal segments stain more darkly than subsequent segments which have two dark dorso-lateral longitudinal bands separated by lateral organs ( Fig. 25 A, B). Lateral organs darkly staining throughout the abdomen ( Fig. 25 B).

Distribution. The type locality for this species is El Tesoro beach, La Paz Bay (Gulf of California) and it is here reported for the first time in the western Pacific Ocean in Oahu, Hawaii.

Remarks. The only specimen found agrees very well with the original description, mainly regarding the MGSP. Branchiae were not found although it may be retractile and the specimen was incomplete.

Figures

FIGURE 23. SEM of Notodasus harrisae: A, anterior end in dorsal view; B, transition between thoracic and abdominal segments; C, abdominal hooded hooks; D, detail of hooded hooks in frontal view.

FIGURE 25. Notodasus harrisae: A, MGSP of thorax and anterior abdominal segments; B, MGSP of anterior abdominal segments. Notodasus kristiani: C, MGSP of end of thorax and anterior abdominal segments; D, MGSP of abdominal segments.