This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.
|Lilliputianella longorii Banner and Desai 1988|
= Hedbergella bizonae
Current identification/main database link: Hedbergella Bronnimann and Brown 1958
See also: Blefuscuiana ;
Extra details from original publication
Lilliputianella spp. appears to have been derived directly from Blefuscuiana spp. by radial elongation of some or all of the chambers of the last whorl. This parallels the independent evolution of Clavihedbergella spp. from Hedbergella (“Planogyrina”) in Albian and Later Cretaceous time, as well as the Cenozoic evolution of Clavatorella, Beella, etc. The radially elongate chambers of Lilliputianella often develop in only the later half of the last whorl (the early whorls being indistinguishable from the ancestral Blefuscuiana) and this parallels the development of radially elongate chambers in the later parts of the last whorl of many forms of Leupoldina (where the juvenile resembles the ancestral Blowiella, e.g. PI. 10, figs. 1, 2). The pointed ovoid form of elongate chamber, which is so common in species of Lilliputianella (pl. 8, figs. 5-7), gives the appearance of incipient sites for tubulospine development, but no tubulospines are known in any trochospiral schackoinid (they are confined to the planospiral Schackoina).
As in the evolution of Blefuscuiana, no species of Lilliputianella is yet known to extend and distally fuse its portici. The development of umbilical accessory apertures by the fusion of portici seems to be confined to the descendants of macroperforate Hedbergella. Therefore, the macroperforate Clavihedbergella has a rotaliporid relative with accessory umbilical apertures and elongate chambers (Claviticinella digitalis (Sigal) El-Naggar), but Lilliputianella has no such descendant. It seems that the microperforate descendants of Praehedbergella had only a limited capacity grossly to homeomorph the descendants of macroperforate Hedbergella (the microperforate forms not only lacked the capacity to parallel the evolution of Tzcinella, but in being nonmuricate, they never evolved peripheral keels).
A stratigraphically very early tendency radially to elongate later chambers is displayed by some specimens of Praehedbergella illustrated by Butt (1979, pl. 3, figs. 11-13). These have only four chambers in each whorl but the last one or two may become as high as long, producing a strongly lobulate peripheral outline. The age of these specimens is disputed, because the nannofossils suggest a Hauterivian age while the foraminifera indicate Barremian (Butt, 1979, p. 257). Such forms are likely to be directly ancestral to Blefuscuiana eocretacea (Neagu) and do not seem to have developed directly into true Lilliputianella.
Banner, F. T. & Desai, D. (1988). A review and revision of the Jurassic-Early Cretaceous Globigerinina,with especial reference to the Aptian assemblages of Speeton (North Yorkshire, England). Journal of Micropalaeontology. 7: 143-185. gs V O Swift, J. (1726). Travels into several remote nations of the world [also known as Gulliver's Travels]. Benjamin Motte, London. -. gs
Banner, F. T. & Desai, D. (1988). A review and revision of the Jurassic-Early Cretaceous Globigerinina,with especial reference to the Aptian assemblages of Speeton (North Yorkshire, England). Journal of Micropalaeontology. 7: 143-185. gs V O
Swift, J. (1726). Travels into several remote nations of the world [also known as Gulliver's Travels]. Benjamin Motte, London. -. gs
Lilliputianella compiled by the pforams@mikrotax project team viewed: 2-2-2023
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