Fig. 4 in The genus Ophelina Örsted, 1843 (Annelida: Opheliidae) in the coast of Kuwait (northern Indian Ocean), with the description of a new species

Fig. 4. Ophelina arabica sp. nov., paratype (MNCN 16.01/17003), SEM micrographs. A. CH14. B. CH21. C. CH28. D. Posterior end, ventral view. E. Last chaetigers, detail (framed in D). F. Pair of basal papillae and unpaired anal cirrus, detail (framed in E). Abbreviations: ata = anal tube annulations; atvdf = anal tube ventro-distal fusion line; atvpf = anal tube ventro-proximal fusion line; lclc = last chaetigers long chaetae; neu = neurochaetae; not = notochaetae; pbp = pair of basal papillae; pcl = parapodial prechaetal lobe; pdc = parapodial dorsal cirrus; pvl = parapodial ventral lobe; uac = unpaired anal cirrus; vg = ventral groove.