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Abstract: Imlay''s ammonite species Paradontoceras butti and Paradontoceras antilleanum are first reported from central-east Mexico under precise stratigraphic control. Mexican and Cuban ammonites referred to these species have been studied and proved to have been gathered from a relatively limited area within the southern paleomargin of the north American Plate, which embraces eastern Mexico and north-western Cuba. The palaeontological examination, the multivariate analysis conducted on Mexican and Cuban data, the precise biostratigraphic and biogeographic control support the reinterpretation of Imlay''s species P. antilleanum and P. butti. The latter has been designated the single, valid nominal species-level taxon which comprises the two species proposed by Imlay. The new genus Housaites has been created since the taxon Butticeras Houša is not available for taxonomic nomenclature. Housaites butti (Imlay) is upper Lower Tithonian (Semiforme/Verruciferum Zone of the Tethyan standard) in Mexico. The stratigraphic range in Cuba is not conclusively known. [Copyright &y& Elsevier]

The stratigraphic and geodynamic interpretation of Upper Jurassic lithostratigraphic units is revised in north-central Mexico and the northern rim of the Gulf of Mexico Basin through updated ammonite and calpionellid biochronostratigraphy. Significant events in the geodynamic evolution in these areas are evaluated and interpreted in terms of tectono-eustatic sequences (TES) of third and second orders. 3rd-TES-I and 2nd-TES-II/III in Mexico and 3rd-TES-I, 3rd-TES-II, and 3rd-TES-III at the northern rim of the Gulf of Mexico show the main traits of the Upper Jurassic Supercycle in these regions, allowing the identification of a combined ‘Atlantic-Tethyan cachet’ in the course of structuring/configuration of the Gulf of Mexico Basin during the Late Jurassic. The easy identification of 3rd-TES-I in north-central Mexico and at the northern rim of the Gulf of Mexico Basin shows no significant difference in geodynamic history during the Oxfordian, which contrasts with the increasing difference from the Kimmeridgian to the Early-Middle Berriasian. Shared trends in stratigraphic architecture with the European margin of the North Atlantic Basin, as well as with epicontinental shelves surrounding Iberia and other Tethyan areas, are interpreted to show phases of the geodynamic evolution in the central North Atlantic Basin, traces of which are recognizable also in western Africa. [Copyright &y& Elsevier]

Well-adapted to high-standard science at the time, Carl Burckhardt made a relevant contribution to stratigraphy in Mexico, providing the guidelines for subsequent research. A revision of his pervasive influence focuses in the interpretation of the ammonite genus Kossmatia Uhlig, with reference to Burckhardt's interpretations between 1906 and 1930, and to those made by subsequent authors. The historical revision of interpretations made at the species- and genus-level reveals a rather "blind follow-up" of Burckhardt's biostratigraphy during the majority of the 20th century. The resulting slowing-down in knowledge was forced by the common discontinuity in ammonite records, unfavorable preservation, relative rarity of ammonite-rich horizons, endemism, and especially by sampling procedures and unnoticed clues in Burckhardt's papers that would have served as guidelines to drive a more appropriate progress. Only since the nineties of 20 th century, interpretations of Mexican Kossmatia benefited from application of horizon-biostratigraphy, and complementary information derived from calpionellids. Aside from mere morphologic grounds, precise biostratigraphy and the favored paleobiogeographic model dynamics support the formal proposal of two new taxa of genus level to replace the use of the taxon-name Kossmatia for Mexican ammonites. The new taxa Burckhardtieia and Aguilerites are endemic and inconclusively known because of selective preservation favoring phragmocones against body-chambers. The new taxonomic proposal helps to identify a local fauna that distributed across the southern north-American plate during middle-to-late Early Tithonian (two-fold division) to Lower and early-Middle Berriasian times, while its origin can only be tentatively interpreted at present. • Carl Burckhardt (1912) first used Kossmatia for Latest Jurassic ammonites in Mexico. • Gaps in ammonite records, preservation, and sampling, hampered fine biostratigraphy. • Horizon-biostratigraphy as the tipping-point for revisions in the past nineties. • Updated revision of Kossmatia literature precludes its application in Mexico. • Bidding two new Mexican taxa fits revisions of Kossmatia literature, recent data, and updated interpretations. [ABSTRACT FROM AUTHOR]