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This is a quite small tintinnid species found in the Mediterranean Sea and elswhere. This image was compiled from several micrographs using Helicon software.
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Tintinnid species
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Figure from Ostenfeld's 1899 description with dimensions shown as given in the text. Described by Ostenfeld as "Tintinnus urceolatus".
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Lugol's-fixed specimen
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Figure from Jorgensen 1924 (Fig. 25) of Amphorella urceolata designated as Craterella acuta by Kofoid & Campbell 1929. Later the genus Craterella was re-named Ascampbellliella as the name Craterella was occupied previously. Dimensions from the text of Jorgensen (1924).
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Figure 369 from Kofoid & Campbell 1929, described as Craterella protuberans, now known as Ascampbellellia protuberans
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Figure from the species description in Hada 1935 (Fig. 3). Dimensions from the text; found in waters off Java.
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Figure from the species description in Jorgensen 1924 (Fig. 24); dimensions from text.
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Specimen from sample taken on October 16 2016
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Specimen from the Bay of Villefranche in winter 2003.
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A conjugating pair of Acanthostomella norvegica from the Chukchi Sea in 2012. Z stack of images made with a 60x objective, DIC optics, lugol's preserved specimens.
