Image
from article Sphaeractinoidea
Sphaeractinoid Actinostromaria rhodaclada, Cretaceous, Jura Mountains: (a) tangential and (b) longitudinal section, ×6. (From A. Steiner, 1932)
Search Results
Search Results
Refine this search
Search result paging links
864 results
Image
from article Arthropoda
The insects are the largest group within the phylum Arthropoda. Some of the most visually appealing insects are the butterflies (order Lepidoptera). (Credit: Shutterstock)
Image
from article Arthropoda
Crustaceans constitute some of the most notable arthropods. The Chesapeake blue crab (Callinectes sapidus) is native to the western Atlantic Ocean and Gulf of Mexico. (Credit: Sandy Franz/Getty Images)
Image
from article Arthropoda
Body segmentation is a fundamental characteristic of the arthropods. The Madagascan fire millipede (Aphistogoniulus corallipes) has numerous leg-bearing segments. (Copyright © McGraw-Hill Education)
Image
from article Arthropoda
Diagram of the position of principal internal organs in a typical arthropod. (Copyright © McGraw-Hill Education)
Image
from article Arthropoda
Fossil of a trilobite, showing its distinctive flattened oval shape and crosswise division of the body (into a head, a thorax, and a pygidium). (Credit: Shutterstock)
Image
from article Lissamphibia
Pedicellate teeth in Lissamphibia: (a) salamander; (b) apodan; (c) frog. Teeth are from the lower jaw (a, b) or upper jaw inverted (c) and are viewed from inside the mouth. (After T. Parsons and E. E. Williams, The teeth of Amphibia and their…
Image
from article Lissamphibia
Operculum-stapes complex of a primitive salamander (skin removed to show internal structures).
Image
from article Crustacea
Some crustaceans in their respective habitats, mostly reduced but not to same scale. Orders are in parentheses. (a) Marine forms and common names: Pollicipes, goose barnacle; Balanus, acorn barnacle; Mysis, opossum shrimp; Orchestia, sand hopper;…
Image
from article Crustacea
Diagram of the fifth pleonal somite of the crayfish, with its paired fifth pleopods.
