. Bulletin of the Natural History Museum Zoology. 22 ORLOVA-BIENKOWSKAJA. Fig. 22 S. vetulus var. angustifrons (=S. vetulus), type series. A, parthenogenetic female, lectotype, B, variability of ventral head margin. Distribution. (Fig. 32). , Alabama (Herrick, 1883), Argen- tina (Sars, 1901 and our data), Brasil (Richard, 1897), Paraguay, Columbia (Olivier, 1960), Peru (our data). Remarks. The original description of this curious species is short but provided with a good illustration (Herrick, 1883). Obviously, S. daphnoides is the senior synonym of S. iheringi. The latter name is u
. Bulletin of the Natural History Museum Zoology. 22 ORLOVA-BIENKOWSKAJA. Fig. 22 S. vetulus var. angustifrons (=S. vetulus), type series. A, parthenogenetic female, lectotype, B, variability of ventral head margin. Distribution. (Fig. 32). , Alabama (Herrick, 1883), Argen- tina (Sars, 1901 and our data), Brasil (Richard, 1897), Paraguay, Columbia (Olivier, 1960), Peru (our data). Remarks. The original description of this curious species is short but provided with a good illustration (Herrick, 1883). Obviously, S. daphnoides is the senior synonym of S. iheringi. The latter name is used (Olivier, 1960) while the former name has been forgotten. 5. iheringi was described from Brasil (Richard, 1897). There is no information about the types. The male was originally described by Sars (1901). S. fonsecai and S. fonsecai var. sinucristatus were described from Brasil. There is no information about the types. Harding (1955) supposes S. fonsecai to be a synonym of S. iheringi. The original description (Bergamin, 1939) supplied with the lateral view of both varieties and the view of the postabdomen of S. fonsecai shows that both names are junior synonyms of S. daphnoides. S. (EXSPINOSUS) species group Diagnosis. Both sexes (Figs 28-30). Frons rounded. Ventral head margin concave, straight or with small prominence. Rostrum short. Setules on inner side of posterior valve margin slender. Dorso- posterior valve angle without prominence or with small rounded prominence. One supra-anal angle. Basal pecten of postabdominal claw of 8-25 close-set spines of equal length. S. exspinosus (De Geer, 1778) Figs 28-30. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural History Museum (London). Andover : Intercept
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