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IRMNG name detailsPithonellidae Keller, 1946 †
107712 (urn:lsid:irmng.org:taxname:107712)
unaccepted (not used in current treatments)
Family
marine,
fossil only
Not documented
Taxonomic remark Pithonelloid calcareous cyst fossils, originally assigned to Foraminifera. Included in Thoracosphaeraceae (Dinophyta) by...
Taxonomic remark Pithonelloid calcareous cyst fossils, originally assigned to Foraminifera. Included in Thoracosphaeraceae (Dinophyta) by Elbrächter et al., 2008, but excluded following Versteegh et al., 2009; not syn. of Cadosinidae (cf. Masters & Scott, 1978) as type genera now in different fams. More recently, Wendler et al., 2013, again suggests that Pithonella has affinities with dinoflagellates, however since this is not 100% certain the relevant taxa are still included in Calcitarcha at this time per original description of the latter group. Note also, if Pithonellids were to be definitively included in Dinophyta, this family name would become a synonym of whichever dinophyte family name is applicable, namely Thoracosphaeraceae (per Elbrächter et al., 2008 and AlgaeBase) or Peridiniaceae (subfamily Calciodinelloideae) per DINOFLAJ3. [details]
IRMNG (2026). Pithonellidae Keller, 1946 †. Accessed at: https://www.irmng.org/aphia.php?p=taxdetails&id=107712 on 2026-05-29
Date action by
basis of record
Masters & Scott, 1978 [details]
additional source Wendler, J. E.; Wendler, I.; Huber, B. T. (2013). Revision and evaluation of the systematic affinity of the calcitarch genus Pithonella based on exquisitely preserved Turonian material from Tanzania. <em>Journal of Paleontology.</em> 87(06): 1077-1106., available online at https://doi.org/10.1666/12-121 note: suggests Pithonella has affinities with dinoflagellates, refer note [details] source of synonymy Versteegh, G. J. M.; Servais, T.; Streng, M.; Munnecke, A.; Vachard, D. (2009). A discussion and proposal concerning the use of the term Calcispheres. <em>Palaeontology.</em> 52(2): 343-348., available online at https://doi.org/10.1111/j.1475-4983.2009.00854.x note: inferred (Pithonella included in informal grouping of "Pithonelloid taxa" within Calcitarcha) [details] extant flag source Benton, M.J. (ed). (1993). The Fossil Record 2. Chapman & Hall, London, 845 pp. [details] habitat flag source Benton, M.J. (ed). (1993). The Fossil Record 2. Chapman & Hall, London, 845 pp. [details] Unreviewed
Taxonomic remark Pithonelloid calcareous cyst fossils, originally assigned to Foraminifera. Included in Thoracosphaeraceae (Dinophyta) by Elbrächter et al., 2008, but excluded following Versteegh et al., 2009; not syn. of Cadosinidae (cf. Masters & Scott, 1978) as type genera now in different fams. More recently, Wendler et al., 2013, again suggests that Pithonella has affinities with dinoflagellates, however since this is not 100% certain the relevant taxa are still included in Calcitarcha at this time per original description of the latter group. Note also, if Pithonellids were to be definitively included in Dinophyta, this family name would become a synonym of whichever dinophyte family name is applicable, namely Thoracosphaeraceae (per Elbrächter et al., 2008 and AlgaeBase) or Peridiniaceae (subfamily Calciodinelloideae) per DINOFLAJ3. [details]
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