Lineus bilineatus

Lineus bilineatus

Biological Flags

  • Ecosystem: Marine
Languages: English

Overview

General Description

(from Coe, W. R. (1905).  Nemerteans of the west and northwest coasts of America.. Bull. Mus. comp. Zool. Harv.. 1-318)
Body of moderate proportions for genus, rounded in esophageal region, flattened posteriorly; head short, broad, commonly a little wider than neck, often slightly emarginate in front,  moderately flattened. Cephalic furrows deep, of moderate length, and, in most states of contraction of head, well separated anteriorly; when strongly contracted, however, reaching nearly to proboscis pore.

Description

External Appearance

(from Coe, W. R. (1905).  Nemerteans of the west and northwest coasts of America.. Bull. Mus. comp. Zool. Harv.. 1-318)
General color of body, hath above and below, deep chocolate brown or olive brown, with a very conspicuous, sharply marked, white or very pale yellow median dorsal stripe extending whole length of body,and gradually enlarging on head to form a broad, pear-shaped whitish marking, often two thirds to three fourths as wide as head. Marking is broadest, and often slightly emarginate, near tip of snout, gradually becoming narrower through about half the length of the head, where it merges into the narrow dorsal stripe which continues throughout the body. Most individuals show a faint reddish line extending from each cephalic furrow backward along lateral margin of body. Cephalic furrows often slightly paler, and rosy; intestinal region inclining toward an olive brown shade. Colors and marking of body well retained after preservation.

Sensory Organs

(from Coe, W. R. (1905).  Nemerteans of the west and northwest coasts of America.. Bull. Mus. comp. Zool. Harv.. 1-318)
Ocelli apparently wanting.

Size

(from Coe, W. R. (1905).  Nemerteans of the west and northwest coasts of America.. Bull. Mus. comp. Zool. Harv.. 1-318)
Length commonly about 10-20 cm.; width 2 mm or more.

Ecology

Habitat

(from Coe, W. R. (1905).  Nemerteans of the west and northwest coasts of America.. Bull. Mus. comp. Zool. Harv.. 1-318)
Dredged in 30 fms., off San Pedro, California, the worms inhabiting strong, parchment-like tubes among broken shells. Found also in 20 ams. in Monterey Bay, California (J. F. Abbott). Not common.

References

Coe, W. R. (1904).  Nemerteans of the Pacific coast of North America. Part II. Harriman Alaska Series. 11, 111–220.
Gibson, R. (1995).  Nemertean species and genera of the world: an annotated check-list of original names and description citations, synonyms, current taxonomic status, habitats and recorded zoogeographic distribution. Journal of Natural History . 29, 271–562.
McIntosh, W. C. (Submitted).  A monograph of the British annelids. Part I. The nemerteans.. 214 pp..