Sessilia is an unranked
clade of
barnacles, comprising the barnacles without stalks, or acorn barnacles. They form a
monophyletic group
A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, ...
and are probably derived from stalked or
goose barnacles
Goose barnacles, also called stalked barnacles or gooseneck barnacles, are filter-feeding crustaceans that live attached to hard surfaces of rocks and flotsam in the ocean intertidal zone. Goose barnacles formerly made up the taxonomic order Pe ...
.
[ Sessilia is divided into two orders. The ]Verrucomorpha
Verrucomorpha is an order of asymmetrical sessile barnacles in the class Thecostraca. They are typically found in deeper and deep-sea habitats. There are 2 families and more than 100 described species in Verrucomorpha.
Families
These families be ...
contain two families, Verrucidae
Verrucidae is a family of asymmetrical sessile barnacles in the order Verrucomorpha. There are about 14 genera and more than 90 described species in Verrucidae.
Genera
These genera belong to the family Verrucidae:
* '' Altiverruca'' Pilsbry, 1 ...
and Neoverrucidae
Neoverrucidae is a family of crustaceans belonging to the order Scalpellomorpha
Scalpellomorpha is an order of acorn barnacles in the class Thecostraca
Thecostraca is a Class (biology), class of marine invertebrates containing over 2,200 des ...
, and the remaining 14 families are in the order Balanomorpha.[
]
References
External links
*
Barnacles
Crustacean orders
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