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Fig. 3 | Frontiers in Zoology

Fig. 3

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

Fig. 3

Distinguishing morphoanatomical characteristics of the shell and head-foot . External, species-specific, morphological features include: a the lengths and arrangement of primary (1°), secondary (2°) and tertiary (3°) periostracal bristles; b the architecture and diameter of the columella where arrowheads indicate the columellar fold (absent in A. boucheti) and; c head-foot coloration (arrowheads indicate neck furrows). Abbreviations: CT Cephalic tentacles; Ft Foot; Mo Mouth; PF Pallial fringe; Sn Snout

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