. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 203. Eodesmoceras haughtoni Spath. Ventral, front and lateral views of the holotype, SAM-227, preserved as an internal mould, x 2. Holotype By monotypy, the original of the specimen figured by Spath (1930, pi. 13 (fig. 2a-e)) from '. . Shore of pan, Zoutpan, Uitenhage', and now in the South African Museum. Diagnosis A compressed, immature Eodesmoceras in which the only ornament is very faint sigmoidal growth striae. Constrictions are lacking. Description The holotype is small, preserved as an in
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 203. Eodesmoceras haughtoni Spath. Ventral, front and lateral views of the holotype, SAM-227, preserved as an internal mould, x 2. Holotype By monotypy, the original of the specimen figured by Spath (1930, pi. 13 (fig. 2a-e)) from '. . Shore of pan, Zoutpan, Uitenhage', and now in the South African Museum. Diagnosis A compressed, immature Eodesmoceras in which the only ornament is very faint sigmoidal growth striae. Constrictions are lacking. Description The holotype is small, preserved as an internal mould, and rather involute, the outer whorl covering about two-thirds of the preceding whorl. The shell is strongly compressed with broad, flat flanks converging slightly to the narrow evenly rounded venter. At 14 mm diameter the specimen is still entirely septate. Constrictions are lacking, whilst Spath presumably observed the growth striae on the inner whorls where the shell material was preserved. The specimen has since been glued together and this feature could not be verified. Measurements No. D H Wi W/H Ui SAM-227 14 8 5 0,63 3(21) Discussion Despite the fact that Spath (1930: 142) considered this species '. . probably represents merely the inner whorls of a larger form like Eodesmoceras celestini (Pictet & Campiche)', he still described it as a new species. The very small size of E. haughtoni makes comparison difficult. It is more compressed than the type of E. celestini, but this is possibly ontogenetic variation since the latter is 28 mm in diameter. According to Wright's (in Arkell et ah. 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 South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
