Pillai: Serpulid polychaetes from the Australian Kimberleys 
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Figure 61. A-H, Spirobranchus tenhovi n.sp., BMNH 1941.3.3.1476, B.A.N.Z.A.R. Expedition, Tasmania Stn. 115,128 m, labelled Spiro- 
branchus latiscapus (Marenz.), but actually containing two genera/species. (A) one of the 8 orange coloured tubes of a Serpula crenata- 
like species mistakenly included with the new species of Spirobranchus, which also has yellowish-orange tubes. B-H, from holotype and 
paratype of Spirobranchus tenhovi n.sp; ( B ) tube of holotype (from which the worm was extracted during the present study); MLR high 
and consists of forwardly directed fin-shaped sections, most anterior one projecting conspicuously forward beyond the aperture; a row of 
oblique, forwardly-directed foramina present on either side, at its base. Two, low, narrow, LLRs present on either side of MLR; each also 
possesses a row of foramina on either side, at its base; (C) dorsolateral view of anterior end of holotype, with a two-tiered operculum; ( D ) 
ventrolateral view of latter; (E) left ventrolateral view of paratype showing its four-tiered operculum; (F) part of radiolar crown showing 
unfringed inter-radiolar membranes; (G) ventral view of thorax of specimen figured in C, showing a dark pigment-spot at the ventral 
end of each uncinal torus; (H) special collar chaeta; its boss is not squarish but merges gradually between distal end of chaetal shaft and 
blade; blade is longer than serrated distal part of chaetal shaft plus boss. 
