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Fig. 2 | Frontiers in Zoology

Fig. 2

From: Classical and computed tomographic anatomical analyses in a not-so-cryptic Alviniconcha species complex from hydrothermal vents in the SW Pacific

Fig. 2

Aspects of gross morphology and explanation of certain malacological terms. Example is A. boucheti: a i) abapertural view with shell dimensions, ii) comparison of bare (PBr) and adorned periostracum (P) in lateral-left view, iii) spiral distance from the apex, measured in whorls, iv) spiral and axial lines in relation to the apex (Ap) and shell margin (SM) and v) apertural view with only a slight parietal callus (PC) and siphonal notch (SN) present; b lateral-left, anterior, lateral-right and near-posterior views of a specimen with a whorl removed. An equivalent micrograph plate for A. kojimai may be found in Additional file 3. NB. the ctenidium (Ct) in A. boucheti is darker in appearance than that of A. kojimai and A. strummeri. Additional abbreviations: 1° ABV Primary afferent branchial vessel; 1° EBV Primary efferent branchial vessel; CM Columellar muscle; Co Columella; CT Cephalic tentacle; Ft Foot; HF Head-foot; NF Neck furrow; Op Operculum; PF pallial fringe; Re Rectum; Sn Snout

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