Adeonidae Busk, 1884

Hirose, Masato, 2016, Diversity and distribution of adeonid bryozoans (Cheilostomata: Adeonidae) in Japanese waters, European Journal of Taxonomy 203 (203), pp. 1-41 : 4

Family Adeonidae Busk, 1884

Remarks

This family consists of approximately 10 genera and 106 species ( Bock & Gordon 2013). Most genera form erect colonies with flat, dichotomous branches (e.g., Adeonella and Adeonellopsis ) or are cribrate in form (e.g., Adeona ), although some genera form encrusting colonies (e.g., Reptadeonella Busk, 1884 ). Adeonella and Adeonellopsis differ in the type of frontal shield: Adeonella has a lepralioid shield in which a spiramen leads into the space above the sinus, and a distinct primary orifice, while Adeonellopsis is thought to have an umbonuloid frontal shield and the spiramen leads into the space above the frontal membrane ( Cook 1973; Lidgard 1996; Berning et al. 2014). Adeonella and Adeonellopsis are also different in the arrangement of the spiramen and frontal/suboral avicularia; Adeonella generally has a monoporous spiramen and frontal avicularia in various positions, whereas Adeonellopsis has a monoporous or multiporous spiramen, with a suboral avicularium situated distal to the spiramen, directed distally or distolaterally.