Search results
Results From The WOW.Com Content Network
The damage to books that is commonly attributed to "bookworms" is often caused by the larvae of various types of insects, including beetles, moths, and cockroaches, which may bore or chew through books seeking food. The damage is not caused by any species of worm. Some such larvae exhibit a superficial resemblance to worms and are the likely ...
Phyllodocida is an order of polychaete worms in the subclass Aciculata. [1] These worms are mostly marine, though some are found in brackish water.Most are active benthic creatures, moving over the surface or burrowing in sediments, or living in cracks and crevices in bedrock.
Spirorbis spirorbis or Spirorbis borealis is a small (3–4 mm) coiled sedentary marine polychaete worm in the Serpulidae family that lives attached to seaweeds and eel grass in shallow saltwater. It is commonly called the sinistral spiral tubeworm and is the type species of the genus Spirorbis .
[4] [5] [6] Some species are bioluminescent, and produce a yellow light. [7] Their sperm differ from other annelids in having two tails. [8] Females produce gelatinous egg cases that floats in the water column. [9] [10] The animals use a type of propulsion called metachronal paddling, a sequential movement of multiple appendages.
Spirorbis borealis is a sedentary marine polychaete worm in the Serpulidae family. It is commonly called the sinistral spiral tubeworm and is the type species of the genus Spirorbis. [2] Polychaetes, or marine bristle worms, have elongated bodies divided into many segments. Each segment may bear setae (bristles) and parapodia (paddle-like ...
Free-living worm species do not live on land but instead live in marine or freshwater environments or underground by burrowing. In biology, "worm" refers to an obsolete taxon, Vermes, used by Carolus Linnaeus and Jean-Baptiste Lamarck for all non-arthropod invertebrate animals, now seen to be paraphyletic. The name stems from the Old English ...
For example, in George O. Poinar Jr's 1990 book on Nematodes and Biological Control, he describes Heterorhabditis, a genus of nematodes that harbors symbiotic bacteria that are highly pathogenic to hosts, but completely harmless to them. After the bacteria kill the host, they proliferate on the host's dead body.
Consequently, estimates of the number of nematode species are uncertain. A 2013 survey of animal biodiversity suggested there are over 25,000. [4] [5] Estimates of the total number of extant species are subject to even greater variation. A widely referenced 1993 article estimated there might be over a million species of nematode. [6]