FIGURE 1. A in Acanthotetilla celebensis sp. nov., a new species from North Sulawesi, Indonesia (Porifera: Demospongiae: Spirophorida: Tetillidae)

FIGURE 1. A. Acanthotetilla celebensis sp.nov., in situ photograph of holotype photo N.J. de Voogd; B. Acanthotetilla celebensis sp.nov., preserved specimen of holotype showing the choanosome (scale bar = 3 cm); C. sigmaspire, (scale bar = 2 μm); D. megacanthoxea, (scale bar = 20 μm); E. megacanthoxea, (scale bar = 50 μm); F, G. detail of same, (scale bar = 10 μm); H. oxea, (scale bar = 20 μm); I. protriaene, (scale bar = 10 μm); J. anatriaene, (scale bar = 20 μm).