Humps Island: Late/Upper Campanian, Antarctica

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Leiosphaeridia informal spp.
Dinoflagellate cysts
Mernbranilarnacia polycladiata
Palaeocystodiniurn granulatum
Dinoflagellate informal form A
Reworked
Peridiniacean endocyst
Dinocyst indet.
N. Gen. X of Askin 1988
Michrystridium informal spp.
Scolecodont indet.
Bisaccate informal sp. A
Reworked
Bisaccates indet.
Taeniate bisaccates
? Fromea laevigata Stover and Evitt 1978
Veryhachium informal sp. Deunff 1954
Cyclopsiella informal spp.
Cymatiosphaera informal spp.
Cymatiosphaera wetzelii Deflandre 1954
Lycopodiopsida - Lycopodiales
Retitriletes clavatoides Döring 1963
Reworked
Retitriletes nodosus Srivastava 1975
Retitriletes austroclavatidites Döring et al. 1963
Retitriletes eminulus Srivastava 1975
Lycopodiopsida - Lycopodiales - Lycopodiaceae
Carmarozonosporites ohaiens
Carmarozonosporites informal spp.
Lycopodiopsida - Lycopodiales
? Dictyotosporites informal sp. Cookson and Dettmann 1958
Lycopodiopsida - Selaginellales
Foveosporites moretonensis De Jersey 1964
Reworked
Ceratosporites equalis Cookson and Dettmann 1958
Lycopodiopsida - Selaginellales - Selaginellaceae
Neoraistrickia informal spp.
unclassified
Protohaploxypinus informal spp.
Reworked
Magnoliopsida
Polycolpites langstonii Stover 1973
Pinopsida - Pinales - Taxaceae
Striatopodocarpites informal spp.
Reworked
Coniferales - Podocarpaceae
Phyllocladidites mawsonii Cookson 1947
Podocarpidites informal spp.
Microcachryidites antarcticus Couper 1953
Podosporites microsaccatus Dettmann 1963
Angiospermae - Malpighiales - Euphorbiaceae
Tricolporopollenites informal sp. Thomson and Pflug 1953
Angiospermae - Fagales
? Nothofagidites fuegiensis Menéndez and Caccavari 1975
Nothofagidites emardicus Harris 1965
Nothofagidites dorotensis Romero 1973
Nothofagidites lachlaniae Pocknall and Mildenhall 1984
Nothofagidites incrassatus Dettmann 1990
Nothofagidites nanus Romero 1977
? Nothofagidites endurus Stover and Evans 1973
Nothofagidites brachyspinulosus Harris 1965
Angiospermae - Proteales - Proteaceae
Proteacidites informal spp.
Proteacidites subscabratus Couper 1960
Angiospermae - Proteales
Peninsulapollis truswelliae Dettmann and Jarzen 1988
Peninsulapollis gillii Dettmann and Jarzen 1988
Peninsulapollis askinae Dettmann and Jarzen 1988
Angiospermae - Gunnerales
? Tricolpites reticulatus Couper 1953
unclassified
Concavisporites sinuatus Krutzsch 1959
Reworked
Pteridopsida
Cyathidites minor Couper 1953
Cyathidites australis Couper 1953
Todisporites minor Couper 1953
Todisporites major Couper 1953
Ischyosporites volkheimeri Filatoff 1975
Reworked
Granulatisporites informal sp. Potonié and Kremp 1954
Reworked
Triletes cf. tuberculgormis
Osmundacidites wellmanii Couper 1953
unclassified
? Trilobosporites informal spp.
Polypodiopsida - Blechnaceae
Leptolepidites verrucatus Couper 1953
Polypodiopsida - Osmundaceae
Baculatisporites comaumensi
Polypodiopsida - Polypodiaceae
Laevigatosporites major Krutzsch 1959
Laevigatosporites ovatus Wilson and Webster 1946
Polypodiopsida - Gleicheniaceae
Gleicheniidites informal sp. Dettmann 1963
Polypodiopsida - Polypodiales - Pteridaceae
Contignisporites fornicatus Dettmann 1963
Reworked
Polypodiopsida - Schizaeales - Schizaeaceae
? Cicatricosisporites hughesii Dettmann 1963
Reworked
? Cicatricosisporites australiensis Potonié 1956
Reworked
unclassified
Plicatipollenites informal spp.
Reworked
Plicatipollenites malabarensis Foster 1976
Reworked
Marchantiopsida - Sphaerocarpales
Aequitriradites informal sp. Delcourt and Sprumont 1955
Bryopsida
Stereisporites antiquasporites Dettmann 1963
Stereisporites pococki Burger 1980
unclassified
Limitisporites informal sp. Leschik 1956
Reworked
Alisporites informal spp.
Chordasporites informal sp. Klaus 1960
Reworked
? Stellidiopollis annulatus Dettmann and Hedlund 1988
Amphidiadema rectangularis Lentin and Williams 1976
Amphidiadema denticulata Cookson and Eisenack 1960
Palamblages informal Form A
Dinophyceae
Xenikoon australis Cookson and Eisenack 1960
Questionable reworked
Nelsoniella tuberculata Cookson and Eisenack 1960
Questionable reworked
Nelsoniella aceras Cookson and Eisenack 1960
Questionable reworked
Diconodinium informal spp.
Diconodinium psilatum Morgan 1977
Exochosphaeridium informal spp.
Dinophyceae - Pareodiniaceae
Batioladinium informal spp.
Dinophyceae - Peridiniales - Peridiniaceae
Chatangiella informal spp.
Vozzhennikovia informal sp. Lentin and Williams 1976
Isabelidinium informal sp. A Lentin and Williams 1977
Isabelidinium informal sp. B Lentin and Williams 1977
Isabelidinium pellucidum Lentin and Williams 1977
Isabelidinium glabrum Lentin and Williams 1977
Reworked
Isabelidinium korojonense Lentin and Williams 1977
Isabelidinium cooksoniae Lentin and Williams 1977
Isabelidinium cf. bakeri Lentin and Williams 1977
Isabelidinium microarmum Lentin and Williams 1977
Isabelidinium cf. cretaceum Lentin and Williams 1977
? Isabelidinium amphiatum Lentin and Williams 1977
Cerodinium albertii Lentin and Williams 1987
Cerodinium diebelii Lentin and Williams 1987
Cerodinium striatum Lentin and Williams 1987
Deflandrea informal spp.
Trithyrodinium informal spp.
Trithyrodinium vermiculatum Lentin and Williams 1976
Manumiella cf. druggii Stover 1974
Leberidocysta cf. chlamyduta Stover and Evitt 1978
Dinophyceae - Peridiniales - Protoperidiniaceae
Phelodinium exilicornutum Smith 1992
Lejeunecysta informal spp.
Dinophyceae - Peridiniales - Deflandreaceae
Palaeocystodinium informal spp.
Dinophyceae
Trichodinium castaneu
Dinophyceae - Gonyaulacales
? Bourkidinium cylindricum Dolding 1992
Batiacasphaera informal spp.
Batiacasphaera reticulata Davey 1979
Dinophyceae - Gonyaulacales - Areoligeraceae
Senoniasphaera protrusa Clarke and Verdier 1967
Senoniasphaera rotundata Clarke and Verdier 1967
Dinophyceae - Gonyaulacales - Goniodomaceae
Dinopterygium cladoides Deflandre 1935
Dinophyceae - Gonyaulacales - Ceratiaceae
Xenascus ceratioides Lentin and Williams 1973
Xenascus gochtii Stover and Evitt 1978
Xenascus sarjeantii Stover and Evitt 1978
Xenascus australensis Cookson and Eisenack 1969
Questionable reworked
Phoberocysta informal sp. A Millioud 1969
Odontochitina indigena Marshall 1988
Odontochitina porifera Cookson 1956
Odontochitina spinosa Wilson 1984
Odontochitina operculata Deflandre 1935
Dinophyceae - Gonyaulacales - Cladopyxiaceae
Microdinium cassiculum Wilson 1984
Dinophyceae - Gonyaulacales - Gonyaulacaceae
Operculodinium flucturum Davey 1969
Operculodinium baculatum Yu Jingxian and Zhang Wangping 1980
? Pterodinium cornutum Cookson and Eisenack 1962
Impagidinium cristatum Lentin and Williams 1981
Cassiculosphaeridia informal spp.
? Cribroperidinium informal spp.
? Oligosphaeridium pulcherrimum Davey and Williams 1966
Oligosphaeridium complex Davey and Williams 1966
Sentusidinium informal sp. A Sarjeant and Stover 1978
Achomosphaera ramulifera (Deflandre 1937)
original and current combination Hystrichosphaeridium ramuliferum
Dinophyceae - Gonyaulacales
Tanyosphaeridium xanthiopyxides Stover and Evitt 1978
Dinophyceae
Spiniferites informal spp.
? Spiniferites informal sp. A Mantell 1850
Spiniferites pseudofurcatus Sarjeant 1970
Spiniferites ramosus Lentin and Williams 1973
subsp. brevifiurcatus; subsp. granosus; subsp. reticulatus
unclassified
Canninginopsis bretonica Marshall 1990
Perotriletes granulatus
Perotriletes laceratus
see common names

Geography
Country:Antarctica
Coordinates: 64.0° South, 57.4° West (view map)
Paleocoordinates:61.9° South, 68.1° West
Basis of coordinate:estimated from map
Altitude:0 meters
Geographic resolution:local area
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Campanian 10 m.y. bin:Cretaceous 7
Key time interval:Late/Upper Campanian
Age range of interval:83.60000 - 72.10000 m.y. ago
Stratigraphy
Geological group:Marambio
Stratigraphic resolution:formation
Stratigraphy comments: Marambio Group sediments of Humps Island (Santa Marta and López de Bertodano formations)
Lithology and environment
Primary lithology:massive lithified sandy sandstone
Secondary lithology: lithified muddy mudstone
Lithology description: Massive sandstones (Facies A of Pirrie & Riding 1988) are generally confined to the lower 50 m of the section and a 20 m interval towards the top. The remainder of the section is predominantly mudstone (Facies C of Pirrie & Riding 1988). The boundary between the Herbert Sound Member and the Cape Lamb Member is seen at the top of the lower portion of mixed sandstone and mudstone, c. 35 m above the base of the section described by Pirrie & Riding (1988). The same lithological change exists 35-50 m above the base of the present section.
Environment:marine indet.
Geology comments: Three distinct palaeoenvironrnents are invoked, based upon the relative abundance of certain commonly occurring taxa and significant changes in the composition of the palynomorph assemblages.

Interval 1 (DJ.288.1-7) appears to represent nearshore conditions, the high proportion of spores and pollen (22-36% of total palynomorphs) supporting this suggestion.

Interval 2 (DJ.288.9-13) represents shallow palaeoenvironments. The acanthomorph acritarch Michrystridium spp. increases to a peak abundance (26% of total palynomorphs) in sample DJ.288.11. This genus is indicative of relatively shallow conditions close to a palaeocoastline (Wall 1965). In the same sample, the proportions of Phelodinium exilicornutum and Senoniasphuera spp. (10% and 17% of total palynomorphs respectively) also increase to their maximum abundance.

Interval 3 (DJ.288.14 & 15) represents a change to a more distal palaeoenvironment.
Taphonomy
Modes of preservation:body,soft parts,original sporopollenin
Size of fossils:microfossils
Temporal resolution:time-averaged
Spatial resolution:parautochthonous
Collection methods and comments
Collection excludes:all macrofossils,some microfossils
Collection methods:bulk,chemical,hydrochloric,hydroflouric,field collection
Reason for describing collection:biostratigraphic analysis
Collection method comments: University of Sheffield: Repository
Metadata
Database number:150182
Authorizer:C. Jaramillo Enterer:P. Santamarina
Modifier:M. Clapham Research group:marine invertebrate,micropaleontology,paleobotany
Created:2013-09-03 06:03:09 Last modified:2024-03-01 18:03:56
Access level:authorizer only Released:2018-09-03 06:03:09
Creative Commons license:CC BY
Reference information

Primary reference:
48058. P. J. D. Dolding. 1992. Palynology of the Marambio Group (Upper Cretaceous) of northern Humps Island. Antartic Science 4(3):311-326 [C. Jaramillo/P. Santamarina]