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Fig. 1 | BMC Zoology

Fig. 1

From: Ultrastructure and functional morphology of the appendages in the reef-building sedentary polychaete Sabellaria alveolata (Annelida, Sedentaria, Sabellida)

Fig. 1

S. alveolata from Saint-Efflam, France. SEM. Body regions and diversity of appendages, whole specimen, lateral view. Ring of opercular papillae (op) directly behind the opercular paleae (pa). Ventral side of operculum with numerous tentacular filaments (tf) protruding from the body and surrounding the mouth; first thoracic segment more or less fused with operculum, 2nd thoracic segment bears 1stpair of branchiae; three parathoracic segments with capillary chaetae-bearing notopodia (not) followed by abdomen with paddle-shaped notopodia; abdominal neuropodia (neu) with simple capillary chaetae. Branchiae (br) present dorsally on the anterior segments except for the first thorax segment; last branchiae on 14th abdominal chaetiger. The posterior end forms the unsegmentated cauda (cauda). Inset: Ventral view of opened operculum. Tentacular filaments partly removed to show pair of palps (pp) and protruding anteriorly. Abbreviations: br - branchia, neu - neuropodium, not - notopodium, op - opercular papilla, pa - opercular palea, pp - palp, tf - tentacular filament

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BMC Zoology

ISSN: 2056-3132

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