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sea urchin

(Encyclopedia)sea urchin, spherical-shaped echinoderm with movable spines covering the body. The body wall is a firm, globose shell, or test, made of fused skeletal plates and marked by regularly arranged tubercles...

mayfly

(Encyclopedia)mayfly, any insect of the order Ephemeroptera, so named because the adults live for a short time, often only a single day, during which they molt twice, mate, and lay their eggs in freshwater. The adu...

Morgan, Conwy Lloyd

(Encyclopedia)Morgan, Conwy Lloyd, 1852–1936, English psychologist. Professor of zoology at University College, Bristol (1887–1909), he served as first vice chancellor of the Univ. of Bristol (1909–10) and wa...

Lyman, Theodore

(Encyclopedia)Lyman, Theodore, 1833–97, American naturalist, b. Waltham, Mass., grad. Harvard, 1855, and Lawrence Scientific School, Harvard, 1858. He was in the Union army as an aide (1863–65) on the staff of ...

tunicate

(Encyclopedia)tunicate to͞oˈnəkĭt [key], marine animal of the phylum Chordata, which also includes the vertebrates. The adult form of most tunicates (also called urochordates) shows no resemblance to vertebrate...

Bütschli, Otto

(Encyclopedia)Bütschli, Otto ôˈtō büchˈlē [key], 1848–1920, German zoologist. He was professor of zoology at the Univ. of Heidelberg. His researches on invertebrate animals advanced knowledge of the develo...

bollworm

(Encyclopedia)bollworm, name for the larvae of two different moths. The pink bollworm is a serious pest of cotton, and the corn earworm, or cotton bollworm, attacks cotton, corn, and other crops. ...

browntail moth

(Encyclopedia)browntail moth, common name for a moth, Nygmia phaeorrhoea, of the tussock moth family. It is a serious pest of forest and shade trees, especially oak. It was introduced from Europe about the same tim...

Fabre, Jean Henri

(Encyclopedia)Fabre, Jean Henri zhäN äNrēˈ fäˈbrə [key], 1823–1915, French entomologist and author. He is known for his observations on insects and his study of their behavior. Fabre demonstrated the impor...

Dean, Bashford

(Encyclopedia)Dean, Bashford, 1867–1928, American zoologist and armor expert, b. New York City, grad. College of the City of New York, 1886, Ph.D. Columbia, 1890. He taught zoology at Columbia (1891–1927), serv...

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