Anokkostenostomum saliens ( Kepner & Carter, 1931 ) Noreña & Damborenea & Brusa, 2005

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 : 54

Anokkostenostomum saliens ( Kepner & Carter, 1931) comb. nov.

( Fig. 5C )

Stenostomum saltatum Kepner & Carter, 1931

S. saliens Kepner & Carter, 1931

Description: Solitary individuals 0.15–0.62 mm long. Two- (0.29 mm) or three- (0.54 mm) zooid chains. Anterior and posterior ends noticeably tapering. The intestine reaches the posterior end of body. Small, lateral ciliated pits. Dense ciliated epidermis, long cilia. Thin and rigid longer sensory cilia, irregularly arranged on the whole body. Uniform rhabdites. Yellowish-white colour in life.

Elongated anterior brain lobes, differentiated into small independent masses (‘metameric’); posterior ones voluminous. No light-refracting bodies.

Oral pore large. Two mobile projections at the posterior region of the oral pore. Pharynx somewhat longer than the mouth. Intestine with lobulated edges, ending near the posterior end. No pharyngeal glands. No excretophores. Nephridiopore ventral and terminal.

Distribution: Virginia ( Kepner & Carter, 1931; Nuttycombe & Waters, 1938) and Georgia ( Nuttycombe & Waters, 1938), USA; São Paulo, interior of São Paulo State and Paraná State, Brazil ( Marcus, 1945b); near Paramaribo and near Zanderij, Surinam ( Van Der Land, 1970); Poznan, Poland ( Kolasa, 1973); Los Talas, Berisso, Buenos Aires, Argentina, October 1998, February to March and June to September 1999. This species has not been previously recorded in Argentina.

Discussion: The length of the solitary individuals found by Kepner & Carter (1931) in the USA (0.62 mm) is slightly greater than that recorded for the South American specimens (0.15–0.4 mm).

Figures

Figure 5. A, Anokkostenostomum pegephilum. B, A. pseudoacetabulum. C, A. saliens. D, A. tuberculosum. E, A. ventronephrium. Scale bars = 100 Mm.