FIGURE 8 in Carlgren's hesitation allayed: redescription and systematics of Heteranthus verruculatus Klunzinger, 1877 (Cnidaria, Actiniaria), with a redefinition of Heteranthidae Carlgren, 1900

FIGURE 8 Longitudinal sections of Heteranthus verruculatus at distalmost end illustrating varying sphincter muscle forms, internal morphology. A. conspicuous and circumscribed (NHM 1954.6.28.23). B. restricted and inconspicuous (MTG59392). C. conspicuous with many folds (WAM Z33604). Abbreviations: fo, fosse; mp, marginal projection; mt, marginal tentacle; sph, sphincter muscle. Scale = 1 mm. Photographs by NWL Yap.