Stenostomum virginianum Nuttycombe, 1931

Noreña, Carolina, Damborenea, Cristina & Brusa, Francisco, 2005, A taxonomic revision of South American species of the genus Stenostomum O. Schmidt (Platyhelminthes: Catenulida) based on morphological characters, Zoological Journal of the Linnean Society 144 (1), pp. 37-58 : 50

publication ID	https://doi.org/10.1111/j.1096-3642.2005.00157.x
DOI	https://doi.org/10.5281/zenodo.5113626
persistent identifier	https://treatment.plazi.org/id/8C6887DA-3077-C475-FFBD-A04FD3E4ABB8
treatment provided by	Carolina (2021-03-24 20:42:53, last updated 2024-11-29 11:10:41)
scientific name	Stenostomum virginianum Nuttycombe, 1931
status

Treatment

Stenostomum virginianum Nuttycombe, 1931 View in CoL

( Fig. 3F View Figure 3 )

Stenostomum carnivorum Jones, 1932 View in CoL

Description: Individuals with 1–4 zooids up to 5 mm long, solitary individuals 0.4–1 mm long. Mobile tapering anterior end. Small, rounded ciliated pits lateral or latero-ventrally placed. Truncate caudal end without intestine-lacking region. Vacuolar epidermic cells and short rhabdites. Long semi-rigid cilia concentrated in the anterior and posterior ends of the body. Vacuolar epidermal cells. Colour in life whitish.

Anterior brain lobes forming small independent masses (‘metameric’). A pair of light-refracting bodies, with fewer than ten spheres (type 2), associated with an extension of the posterior brain lobes.

Small rounded oral pore. Long tubular pharynx (1/4 body length) with isolated pharyngeal glands (type a) distributed along the entire pharynx. Excretophores regularly arranged in two lateral bands, or irregularly in the North American specimens. Nephridiopore subterminal.

Distribution: Virginia ( Nuttycombe, 1931; Nuttycombe & Waters, 1938), Georgia, North Carolina ( Nuttycombe & Waters, 1938; Kolasa, 1991), USA; Nova Scotia, Canada ( Jones, 1932); São Paulo State and Paraná State, Brazil ( Marcus, 1945b); Los Talas, Berisso, Buenos Aires, Argentina, July 1999. This species has not been previously recorded in Argentina.

Stored material: One sagittally sectioned specimen in the CHMLP No. 5307.

Discussion: Marcus (1945b) and Luther (1960) refer to the similarity between this species and Stenostomum unicolor O. Schmidt, 1848 .

The largest sized specimens correspond to those mentioned by Marcus (1945b)

References

Jones EJ Jr. 1932. Stenostomum carnivorum n. sp. Zoologischer Anzeiger 97: 292 - 295.

Kolasa J. 1991. Flatworms: Turbellaria. In: Thorp JM, Covich AP, eds. Ecology and classification of North American freshwater invertebrates. New York: Academic Press, 145 - 171.

Luther A. 1960. Die Turbellarien Ostfennoskandiens. Fauna Fennica 7: 1 - 155.

Marcus E. 1945 b. Sobre Microturbelarios do Brasil. Comunicaciones Zoologicas del Museo de Historia Natural de Montevideo 1 (25): 1 - 74. Est I - XI.

Nuttycombe J. 1931. Two new species of Stenostomum from the Southeastern United States. Zoologischer Anzeiger 97: 80 - 85.

Nuttycombe J, Waters A. 1938. The American species of the genus Stenostomum. American Philosophical Society 79: 213 - 301.

Schmidt EO. 1848. Die rhabdocoelen Strudelwurmer des sussen Wassers. Jena: Fr. Mauke.