Definition of Pygidium. Meaning of Pygidium. Synonyms of Pygidium

Here you will find one or more explanations in English for the word Pygidium. Also in the bottom left of the page several parts of wikipedia pages related to the word Pygidium and, of course, Pygidium synonyms and on the right images related to the word Pygidium.

Definition of Pygidium

Pygidium
Pygidium Py*gid"i*um, n.; pl. Pygidia. [NL., fr. Gr. ?, dim. of ? the rump.] (Zo["o]l.) The caudal plate of trilobites, crustacean, and certain insects. See Illust. of Limulus and Trilobite.

Meaning of Pygidium from wikipedia

- The pygidium (pl.: pygidia) is the posterior body part or shield of crustaceans and some other arthropods, such as insects and the extinct trilobites....
- based on the pygidium being micropygous (pygidium smaller than cephalon), subisopygous (pygidium sub equal to cephalon), isopygous (pygidium equal in size...
- Rhizosomichthys Bathophilus Miles, 1942 Bathypygidium Whitley, 1947 Of Rhizosomichthys totae Pygidium totae Miles, 1942 Trichomycterus totae (Miles, 1942)...
- trilobite. It has a headshield (or cephalon) wider than the tailshield (pygidium), and in between them three thoracic body segments (somites). The genus...
- segments, with the relatively large pygidium with a slender axis of 11 to 16 rings and 6 or 7 pleural ribs. The pygidium ends in a striking tail spike. Some...
- via blood vessels.   Prostomium   Peristomium O Mouth   Growth zone   Pygidium O **** In addition to Sipuncula and Echiura, also lineages like Lobatocerebrum...
- 19–21 segments and adorned with longish, recurved pleural spines. Its pygidium was comparatively small. Paradoxides is a characteristic Middle-Cambrian...
- shaped spines on the three rear thoracic segments. The tailshield (or pygidium) is typically small with an entire margin or pair of spines in Paradoxididae...
- Hatcheria macraei (Girard, 1855) Synonyms Thrichomycterus macraei Girard, 1855 Pygidium Burmeisteri Berg, 1895 Hatcheria patagoniensis Eigenmann, 1909 Hatcheria...
- The thorax is usually much longer than the pygidium, which is usually small. In some species the pygidium is outlined with a flat border. The Subclass...