Foraminifera taxon details
Dilatofusulina Wang & Ueno, 2009 †
1061228 (urn:lsid:marinespecies.org:taxname:1061228)
accepted
Genus
Codonofusiella orthogonios Sheng & Sun, 1975 † accepted as Dilatofusulina orthogonios (Sheng & Sun, 1975) † (type by original designation)
marine, brackish, fresh, terrestrial
fossil only
feminine
Wang, Y.; Ueno, K. (2009). A new fusulinoidean genus Dilatofusulina from the Lopingian (upper Permian) of southern Tibet, China. <i>The Journal of Foraminiferal Research</i>. 39(1): 56-65., available online at https://doi.org/10.2113/gsjfr.39.1.56
page(s): p. 57 [details] Available for editors
[request]
page(s): p. 57 [details] Available for editors
[request]
Original description Description. The shell is small to medium in size in the family, oval in outline, with bluntly pointed polar ends, broadly...
Original description Description. The shell is small to medium in size in the family, oval in outline, with bluntly pointed polar ends, broadly rounded lateral slopes, and a broadly arched central part of shell. The first one or one-and-a-half volutions are lenticular and coiled at a large angle to the outer ones. The following one or two volutions become a short fusiform, expanding gradually. The last half volution rapidly increases in height, producing a dome-like, strongly expanding yet coiled final whorl. The proloculus is small and spherical. The spirotheca is thin and composed of a structureless single layer in the juvenile volutions, and it is composed of a tectum and a relatively thicker, less dense layer (diaphanotheca) in the outer volutions. Septa are plain in the lenticular volutions, but they are strongly and regularly fluted in the following volutions. Chomata are only present in the lenticular volutions. The tunnel is low and basal in the early volutions, but it is central as relatively large and irregular openings in outer volutions.
Distribution. The genus Dilatofusulina was found in four localities: the Gyanyima section in Drhada County of southern Tibet, China (this study); the Lamayuru section in Himalayan Ladakh, India (Lys and others, 1980); and Tianjun and Maduo Counties in Qinghai Province, China (Sheng and Sun, 1975). Both the Gyanyima and Lamayuru sections are considered large-sized exotic blocks along the Indus-Tsangbo Suture Zone and its western extension and are interpreted as isolated carbonate buildups formed within the Neotethys Sea (Shen and others, 2001, 2003) or close to the Tethyan area (Lys and others, 1980). The two Qinghai localities belonged to the southern margin of Laurasia during the Late Permian according to Heubeck (2001). This new genus is found on the northern and southern margins of the Tethys Sea, but not in the paleo-equatorial Tethys, where Palaeofusulina is well developed. Late Changhsingian.
(Wang and Ueno (2009)). [details]
Distribution. The genus Dilatofusulina was found in four localities: the Gyanyima section in Drhada County of southern Tibet, China (this study); the Lamayuru section in Himalayan Ladakh, India (Lys and others, 1980); and Tianjun and Maduo Counties in Qinghai Province, China (Sheng and Sun, 1975). Both the Gyanyima and Lamayuru sections are considered large-sized exotic blocks along the Indus-Tsangbo Suture Zone and its western extension and are interpreted as isolated carbonate buildups formed within the Neotethys Sea (Shen and others, 2001, 2003) or close to the Tethyan area (Lys and others, 1980). The two Qinghai localities belonged to the southern margin of Laurasia during the Late Permian according to Heubeck (2001). This new genus is found on the northern and southern margins of the Tethys Sea, but not in the paleo-equatorial Tethys, where Palaeofusulina is well developed. Late Changhsingian.
(Wang and Ueno (2009)). [details]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2025). World Foraminifera Database. Dilatofusulina Wang & Ueno, 2009 †. Accessed at: https://marinespecies.org/Foraminifera/aphia.php?p=taxdetails&id=1061228 on 2026-04-05
Date
action
by
original description
Wang, Y.; Ueno, K. (2009). A new fusulinoidean genus Dilatofusulina from the Lopingian (upper Permian) of southern Tibet, China. <i>The Journal of Foraminiferal Research</i>. 39(1): 56-65., available online at https://doi.org/10.2113/gsjfr.39.1.56
page(s): p. 57 [details] Available for editors [request]
page(s): p. 57 [details] Available for editors
[request]From editor or global species database
Original description Description. The shell is small to medium in size in the family, oval in outline, with bluntly pointed polar ends, broadly rounded lateral slopes, and a broadly arched central part of shell. The first one or one-and-a-half volutions are lenticular and coiled at a large angle to the outer ones. The following one or two volutions become a short fusiform, expanding gradually. The last half volution rapidly increases in height, producing a dome-like, strongly expanding yet coiled final whorl. The proloculus is small and spherical. The spirotheca is thin and composed of a structureless single layer in the juvenile volutions, and it is composed of a tectum and a relatively thicker, less dense layer (diaphanotheca) in the outer volutions. Septa are plain in the lenticular volutions, but they are strongly and regularly fluted in the following volutions. Chomata are only present in the lenticular volutions. The tunnel is low and basal in the early volutions, but it is central as relatively large and irregular openings in outer volutions.Distribution. The genus Dilatofusulina was found in four localities: the Gyanyima section in Drhada County of southern Tibet, China (this study); the Lamayuru section in Himalayan Ladakh, India (Lys and others, 1980); and Tianjun and Maduo Counties in Qinghai Province, China (Sheng and Sun, 1975). Both the Gyanyima and Lamayuru sections are considered large-sized exotic blocks along the Indus-Tsangbo Suture Zone and its western extension and are interpreted as isolated carbonate buildups formed within the Neotethys Sea (Shen and others, 2001, 2003) or close to the Tethyan area (Lys and others, 1980). The two Qinghai localities belonged to the southern margin of Laurasia during the Late Permian according to Heubeck (2001). This new genus is found on the northern and southern margins of the Tethys Sea, but not in the paleo-equatorial Tethys, where Palaeofusulina is well developed. Late Changhsingian.
(Wang and Ueno (2009)). [details]
From editor or global species database
Image from typetaxon