ON RECENT SPECIES OF SPIRASERPULA REGENHARDT, 1961 



65 



Fig. 11 Serpulu karpalensis sp. nov. A, Tube with granular overlay, erect part and funnel-shaped peristome. B & C, Substrata! view of two 

 tubes, opened to show internal serrated ventral ridge along convex wall, but absence of dorsal ridge. D, Aggregation of tubes, some 

 sections showing a very short crescentic dorsal ridge. E, Erect part from same aggregation showing somewhat thickened distal end; granular 

 overlay. F, Anterior end of holotype showing collar and thoracic membrane. G & H, Two views of zygomorph operculum. I-K, Bayonet 

 chaetae. 



F) and the fourth on the right. It is not certain whether 

 ventral thoracic glands are present, but see note on live 

 material below. 



Each collar fascicle bears 3 bayonet chaetae (Fig. 11, I-K), 

 with moderately long, finely serrated blades, a moderately 

 long unserrated notch, and 3 teeth on the basal boss; the third 

 tooth may sometimes be difficult to observe and may be 

 reduced to a scar. Thoracic uncini have 6 (exceptionally 7) 

 teeth, anterior abdominal uncini 5, arranged in a single row. 

 The middle abdominal uncini are rasp-shaped, with 3-5 teeth 

 above the single anterior tooth. At least 35 abdominal 

 chaetigers are present, the last 7 with capillary chaetae. 

 Abdominal flat trumpet chaetae number 2-3 per bundle. 



The specimen from Curasao agrees in most details with the 



type material. Its numbers of radioles are 5/5, a long filamen- 

 tous rudimentary operculum is present opposite the opercu- 

 lum, and it has 38 abdominal chaetigers. 



Live material. As observed in material collected in 1990, 

 radioles are transparently lemon. Thorax ventrally with 5 

 bright red globules arranged in a V, presumably thoracic 

 glands. 



Etymology, named after the type locality, the coral reef in 

 front of the Sentro Ekologiko, Karpata. 



Habitat and distribution. A shallow water cryptic reef 

 dweller. Has hitherto been recorded only from its type 

 locality in Bonaire, and Curacao. 



