Micropodarke dubia ( Hessle, 1925 )

Pleijel, Fredrik & Rouse, Greg, 2005, A revision of Micropodarke (Psamathini, Hesionidae, Polychaeta), Journal of Natural History 39 (17), pp. 1313-1325 : 1315

Micropodarke dubia ( Hessle, 1925)

( Figures 1–6 )

Kefersteinia dubia Hessle 1925, p 32 –34, Figure 11 (lectotype UUZM 674a1; this study). Micropodarke amemiyai Okuda 1938, p 89 –90, Figure 10A–E (type material appears to be absent); Uschakov and Wu 1965, p 71, figure 19.

Micropodarke dubia: Imajima and Hartman 1964, p 83 ; Banse and Hobson 1968, p 13 –14, Figure 11.

Micropodarke trilobata Hartmann-Schröder 1983, p 125 –126, Figures 1–3 (holotype

HZM P-17394); 1986, p 36; 1989, p 17.

Micropodarke A Pleijel 1998 , Figure 13A–F.

Micropodarke sp. Mackie et al. in press.

Figures

Figure 1. Relationships between number of segments and length in Micropodarke dubia. Specimens from (•) the Great Barrier Reef; (Z) Papua New Guinea; (O) California; (.) western Canada; (m) Hong Kong; (n) Japan.

Figure 2. SEM pictures of Micropodarke dubia from Sagami Bay, Japan. (A) Anterior end, dorsal view; (B) median neurochaetae, showing blade with prolonged basal teeth; (C) adhesive papillae, left side, ventral view; (D) close-up of adhesive papilla. Scale bars: 0.1 mm (A, C); 10 mm (B); 50 mm (D).

Figure 3. SEM pictures of Micropodarke dubia from Hong Kong. (A) Anterior end, dorsal view; (B) anterior end, ventral view; (C) terminal part of everted proboscis; (D) adhesive papilla; (E) chaetae from median parapodium, blades with prolonged teeth in the middle; (F) posterior end, ventral view. Scale bars: 0.1 mm (B, A same scale); 0.05 mm (C, D, F); 10 mm (E).

Figure 4. LM pictures of Micropodarke dubia from Hong Kong. (A) Anterior end, showing proboscis diaphragm, eyes visible as dark spots on top of picture; (B) Chaetae, median parapodium; (C) median parapodium, ventrolateral view. Scales unknown.

Figure 5. SEM pictures of Micropodarke dubia from California. (A) Anterior end, dorsal view; (B) anterior end, left side; (C) median parapodia, left side, dorsal view; ventral cirri segment 3 is regenerating; first adhesive papilla visible behind neuropodium segment 3; (D) median parapodia, ventral view; (E) adhesive papilla; (F) posterior end, ventral view; the elongated, attached object on the right side is an unknown commensal. Scale bars: 100 mm (A, C, D); 50 mm (B, E, F).

Figure 6. Geographical distribution of Micropodarke dubia. (.) Represents records based on examined specimens and (Z) records from the literature.