FIG. 3. — Hornera frondiculata (Lamarck, 1816), frontal side: A, part of colony with five bifurcations; B, growing tip of a branch; C, initial stage of secondary calcification with ridges encircling autozooids with typically notched peristomes and frontal wall pierced with large mural pores; D, intermediate stage of secondary calcification; E, older stage of secondary calcification; F, part of colony with several lateral branches. Origin: A-D, Greece, Scarpanto Strait, 29-33 m, 29.VIII.1967; E, Marseille, Riou Is., 70 m, 3.VII.1971; F, Riou Is., 90 m, 2.III.1972. Scale bars: A, F, 500 µm; B, 200 µm; C-D, 100 m; E, 150 µm. Photos: Jean-Georges Harmelin.

Published as part of Harmelin, Jean-Georges, 2020, The Mediterranean species of Hornera Lamouroux, 1821 (Bryozoa, Cyclostomata): reassessment of H. frondiculata (Lamarck, 1816) and description of H. mediterranea n. sp., pp. 525-545 in Zoosystema 42 (27) on page 531, DOI: 10.5252/zoosystema2020v42a27, http://zenodo.org/record/4134444