The Collaborative International Dictionary
Sphaeridium \Sph[ae]*rid"i*um\, n.; pl. Sph[ae]ridia. [NL., fr. Gr. ??? a sphere.] (Zo["o]l.) A peculiar sense organ found upon the exterior of most kinds of sea urchins, and consisting of an oval or sherical head surmounting a short pedicel. It is generally supposed to be an olfactory organ.
Wiktionary
n. (context zoology English) A sense organ found on the exterior of most sea urchins, consisting of an oval or spherical head surmounting a short pedicel. It is generally supposed to be an olfactory organ.
Wikipedia
Sphaeridium is a genus of beetles in the family Hydrophilidae, the water scavenger beetles. They occur in Europe, and some species have been introduced to North America.
The adults are 4 to 7.5 millimeters long. They have short antennae with hairy clubs at the tips.
These beetles live in cow dung. The adults feed on the dung and other organic matter, but the beetle larvae are predators of the maggots of the flies that breed in the dung, such as the face fly (Musca autumnalis). Two or more Sphaeridium beetle species may coexist in one pat, and the larvae may feed on each other. The female beetle deposits several eggs encased in a cocoon.
Species include:
- Sphaeridium bimaculatum
- Sphaeridium bipunctatum
- Sphaeridium bipustulatum
- Sphaeridium inquinatum
- Sphaeridium lunatum
- Sphaeridium marginatum
- Sphaeridium pellucidum
- Sphaeridium plagiatum
- Sphaeridium punctiforme
- Sphaeridium rubrum
- Sphaeridium ruficolle
- Sphaeridium rufipes
- Sphaeridium scarabaeoides
- Sphaeridium substriatum
- Sphaeridium testudineum
- Sphaeridium vaccarium