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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Capilloventer

Capilloventer Harman & Loden, 1984 (ref. ID; 5859 original paper)

Family Capilloventridae (ref. ID; 5859 original paper, 6451)

ref. ID; 5859

Setae beginning in III, one hair and one bifid seta per bundle. Ventral setae of XII modified to form penial setae. Gland cells associated with terminal portion of male duct. (ref. ID; 5859)

Etymology

capillus L., hair; venter L., belly; refers to the ventral placement of hair setae. (ref. ID; 5859)

Type species

Capilloventer atlanticus sp. n. (ref. ID; 5859)
  1. Capilloventer atlanticus Harman & Loden, 1984 (ref. ID; 5859 original paper)
  2. Capilloventer australis (ref. ID; 6451)

Capilloventer atlanticus Harman & Loden, 1984 (ref. ID; 5859 original paper)

Descriptions

Length 2.5-3.8 mm (fixed), 19-32 segments. Diameter in whole-mounted, slightly compressed specimens: 0.09-0.14 mm. Prostomium rounded, slightly longer than width at peristomial junction. Clitellum thin, covering segments XI, XII, XIII. Somatic setae beginning in III, all bundles with 1 (occasionally 2) finely serrated hair, 133-185 um long; and 1 (occasionally 2) bifid crochet seta, 37-49 um long. Bifid crotchets all identical in structure, distal tooth much shorter and thinner than proximal. Ventral setae of XII modified to form penial bundles, each bundle with two types of setae: 3-4 thick setae, ca. 150 um long, hooked distally, elongate tip, coiled proximally in spherical setal pouch, ca. 50 um diameter; 1-2 thin hair setae closely associated with each thick seta, ca. 150 um long. Distal end of penial setal bundle protruding into small copulatory chamber. Male pores paired in XII, in somatic setal planes. Pharynx with dorsal pharyngeal plate composed of columnar cells. Paired salivary glands present. Esophagus covered with glandular tissue. Chlorogogue sparse. No pharyngeal, esophageal, or intestinal diverticula present. Esophagus and intestine finely ciliated. Spermathecae paired in VII, ca. 160 um long, up to 50 um, diameter, thin-walled, extending posteriorly to VIII. Spermathecal pores opening laterally in intersegmental furrow 6/7, with associated gland cells. Sperm cells diffuse, not organized in bundles. Male reproductive system with all structures paired. Sperm funnels conical, 20 um diameter, 40 um long, on septum 11/12. Sperm duct ca 180 um long, 10 um diameter, not ciliated; without distensions, loops, or coils. Granular, elongate gland cells associated with termination of sperm duct at copulatory chamber. Testes in XI. Anterior sperm sac formed from septum 10/11, extending anteriorly to septum 8/9. Posterior sperm sac formed from septum 11/12, extending posteriorly to XIII. Ovaries in XII. Female pores in XIII, posterior to intersegmental furrow 12/13. (ref. ID; 5859)

Habitat

Marine, 22 m depth, coarse sand. (ref. ID; 5859)

Etymology

Refers to the type-locality, the Bay of Rio de Janeiro, an inlet of the Atlantic Ocean. (ref. ID; 5859)

Type locality

Brazil: Bay of Rio de Janeiro, 23 degrees 03'S, 43 degrees 17.3'W; August 6, 1975. C. Jouin. (ref. ID; 5859)