FIGURE 12 in Serpulidae (Annelida: Polychaeta) from the Suez Canal- From a Lessepsian Migration Perspective (a Monograph) 2848

FIGURE 12. Variability in opercula of Hydroides homoceros from different regions. A—Operculum characterized by "single-anchor-shaped" (or T-shaped) marginal radii (see also "D") from Great Bitter Lake population (sample SLC 117, see App. Table 2C), B—Specimen with "spur-tipped-T-shaped" marginal radii from the Persian (Arabian) Gulf, leg. anon., sample sent to NBE for identification via the late T. Holthe, C—Specimen with "double-anchor" marginal radii from the Dahlak Archipelago (Israel South Red Sea Expedition sample ISRSE 65-TAU-MO-Malleidae 1814), D— Enlarged tip of marginal radius from Fig. A—5th radius from left—from Bitter Lake, Suez Canal—resembles that of specimens from Mediterranean population, E—Lessepsian migrant specimen from the coast of Israel (legit E. Gilat, Gilat sample 1821B, 10.XI.1969, Ashqelon, 22 m). Scale: 100 µm.