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kutorginata
Science; General science
A small extinct class and one of the most primitive types of rhynchonelliformean brachiopods. The kutorginates were widely distributed from the Early Cambrian and became extinct ...
parablastoidea
Science; General science
A small extinct class of relatively advanced blastozoan echinoderms containing five genera (three named), ranging from the middle Early Ordovician to the early Late Ordovician in ...
obolellida
Science; General science
A small extinct order of articulated brachiopods that ranges in age from Early to Middle Cambrian and includes the earliest known calcitic brachiopods.
paterinida
Science; General science
A small extinct order of inarticulate brachiopods that ranges in age from Early Cambrian to Middle Ordovician. The shell is chitinophosphatic in composition, and its outline is ...
asteroxylales
Science; General science
A small extinct order of the class Lycopsida that bridges the evolutionary gap between the primitive Zosterophyllopsida and relatively advanced Lycopsida; hence the ...
gooseberry
Science; General science
A small fruit represented by about six species of the genus Ribes of the plant order Rosales. The gooseberry is a thorny, spreading bush which grows to a height of about 3 ...
anoplura
Science; General science
A small group of insects usually considered to constitute an order. They are commonly known as the sucking lice. All are parasites living in the covering hair of mammals. About ...
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