CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana mayaroensis Bolli 1951
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.
Original Description The test has a lobate periphery and is flat or slightly convex on the dorsal side. The last chambers in many cases become slightly inflated dorsally, giving to the upper side of the test a somewhat uneven appearance. The side wall, which is limited by the marginal dorsal and ventral keels, also, in some specimens, appears slightly convex in the last chambers. The ventral side of the test is concave, but the last chambers are, as on the dorsal side, in many specimens more or less inflated. Chambers of the last whorl do not always follow one another uniformly, some being arranged more or less obliquely with respect to one another. The suture lines on the dorsal side are strongly curved, the initial parts clearly beaded and later very strongly developed. They are radial on the ventral side. The last whorl is usually formed by five chambers, but four are also common. Six chambers have been noted only in one specimen. The preservation of the specimens so far examined has not allowed detailed study of the aperture or apertures, which probably open into the umbilicus. A coverplate over the umbilicus with several apertures seems to be present, however, in some of the better preserved specimens. Size: diameter, 0.6 mm.; thickness, 0.27mm Extra details from original publication As already stated, the specific and stratigraphic characteristics of this species allow it to be distinguished from the G. lapparenti group. Information on G. mayaroensis is still incomplete, but as far as can be determined, it seems to have evolved from G. citae via G. intermedia and thus it probably had no connection with the G. lapparenti group.
Name - This species is named after the County of Mayaro, Trinidad, where it was first noted
References:
Bolli, H. M. (1951b). Bolli, H. M. (1951). The genus Globotruncana in Trinidad. Journal of Paleontology. 25(2): 187-199. Journal of Paleontology. 25(2): 187-199. gs
Globotruncana mayaroensis compiled by the pforams@mikrotax project teamviewed: 20-6-2025
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Bolli 51 pl35 f10-12.JPG
holotype-2.jpg
Bolli 51 pl35 f10-12.JPG
holotype-2.jpg
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