The phylum Mollusca includes one of the most beautiful examples of colour patterns in present-day... more The phylum Mollusca includes one of the most beautiful examples of colour patterns in present-day shells. However, they are rare in the fossil record because they demand excellent fossilization. In Brazil, colour patterns in fossil mollusk shells are recorded in gastropods Natica aff. bulbulus White, 1887 from the Riachuelo Formation (Aptian-Albian), Sergipe-Alagoas Basin. This paper presents the first gastropod shells from the Romualdo Formation with colour patterns, visible under natural and UV light, belonging to the families Naticidae and Cassiopidae, collected at Santo Antônio outcrop municipality of Exu, Pernambuco and, Pinheiro and Serra do Mãozinha sites, municipality of Missão Velha and Romualdo site, municipality of Crato, Ceará. Among the cassiopids more than 100 specimens were tested, with 1/3 of them showing a residual colour pattern under UV light exposure, after chemical preparation. They correspond to the species Paraglauconia (Diglauconia) araripensis (Beurlen, 1964...
A systematic study is made of Early Cretaceous (late Aptian/earlyAlbian) ostracod assemblages fro... more A systematic study is made of Early Cretaceous (late Aptian/earlyAlbian) ostracod assemblages from the Santo Antônio section. This section is characterized by sediment belonging to the post-rift sedimentary sequence of the Romualdo Formation in the southern-central region of the Araripe Basin, Brazil and represents on of the first marine ingression in the interior of the continent, during the beginning of the formation of the Atlantic Ocean. The Santo Antonio section presents ostracods in greater diversity than previously known. Nineteen samples were analyzed, yielding a total of 8,370 specimens. Fifteen taxa were identified, including six brackish ostracods: Pattersoncypris salitrensis, Pattersoncypris angulata, Pattersoncypris micropapillosa, Damonella grandiensis, Alicenula cf. leguminella and Theriosynoecum cf. quadrinodosum; and nine typically brackish-marine species, including seven new ones: Dicrorygma cf. minuta, Dicrorygma (Orthorygma?) dimorpha, Mongolianella aptianensis s...
The Museu de Ciências Naturais e de História Barra do Jardim was created on October 27, 2001 and ... more The Museu de Ciências Naturais e de História Barra do Jardim was created on October 27, 2001 and has the mission of rescuing, preserve and promoting local culture. It is located in the urban and historical area of the municipality of Jardim and belongs to the Francisco de Lima Botelho Foundation. The geological importance of the municipality is widely known in the context of the Araripe Sedimentary Basin for the classic outcrops of the Romualdo Formation, such as Sobradinho Site, and for the reasonable presence of fossils. Despite this, the municipality is not included in territory of the Araripe Global Geopark, but still has the support of various segments of society to preserve and promote its historical and natural heritage, the fossils of the Araripe Sedimentary Basin. This work aims to present the paleontological collection of the museum, which currently has 375 specimens cataloged with data on geological and geographical origin, specific taxonomic identification or at higher levels (phyla, genus or family), and in many cases, collector and date of collection. The paleontological collection consists mostly of fish (62.2%), followed by plants (10%), reptiles (7.7%), in addition to ichnofossils (8.2%), arthropods (5.8%), molluscs (4%) and others (3%), including the crustacean holotype Araripenaeus timidus. This collection reflects the fossiliferous diversity of the Romualdo Formation, coming from 11 sites in the municipality of Jardim, including collections from Avenida Wilson Roriz, in the city center. The collection began with the clarification of the population on the scientific and cultural value of natural heritage, and an example of heritage education, by strengthening the relationship of people with their cultural heritage. The museum houses not only fossil specimens for research that are relevant to the knowledge of paleontology in the Araripe Sedimentary Basin, but also constitutes a place of regional public visitation with an educational, cultural and tourist effect.
The unusual association of fish and crabs from Romualdo Formation, Aptian–Albian of the Araripe s... more The unusual association of fish and crabs from Romualdo Formation, Aptian–Albian of the Araripe sedimentary Basin, NE Brazil. In a study and collection of fossils from the Romualdo Formation in “Araripe pernambucano”, an association of Vinctifer comptoni and Rhacolepis buccalis with eubrachyurans and orithopsids crabs was observed in four calcareous nodules. Associations were discussed based on ecological and taphonomic hypotheses. It is noted from the degree of articulation of the organisms, that either the death or the availability of crab moults in the sediment possibly occurred before the death of the fish. In addition, the fish do not have teething consistent with feeding on crabs. Thus, this association would occur due to fossilization processes and not due to ecological interactions. The study also emphasized systematic and paleogeographic aspects of the groups. Romualdocarcinus salesi is probably related to the “higher” true crabs (Eubrachyura), a hypothesis already raised i...
Brachyurans played important ecological and evolutionary roles in the marine benthic communities ... more Brachyurans played important ecological and evolutionary roles in the marine benthic communities of the past and were the components of the Mesozoic Decapod Revolution. Therefore, the search for their fossil remains is fundamental to understanding the composition, diversity, and ecological structure of Mesozoic marine benthic communities. Brachyuran remains are uncommon in the decapod record of the Aptian Romualdo Formation in the Araripe Basin. In this context, we recorded and described new occurrences of Exucarcinus gonzagai, preserved in shales from the middle portion of the Romualdo Formation, near the city of Jardim in the State of Ceara. Comparisons between these new specimens and former specimens from the Exu locality, State of Pernambuco, including the type material, allowed us to recognize, for the first time, three distinct ontogenetic stages (i.e., informally referred as I, II, and III). Throughout ontogenetic development, the carapace becomes wider and spinier. Stage III...
RESUMO Na Bacia Sedimentar do Araripe, as rochas que caracterizam a Formação Romualdo, Neoaptiano... more RESUMO Na Bacia Sedimentar do Araripe, as rochas que caracterizam a Formação Romualdo, Neoaptiano-Eoalbiano (Cretáceo Inferior), tiveram sua deposição em ambiente lagunar com influência marinha. No distrito de Brejinho, porção noroeste da bacia, município de Araripe (CE), foi encontrado um afloramento da Formação Romualdo, com concentração de conchas de moluscos (gastrópodes e biválvios) que possibilitou estudos tafonômicos. Nesse local, realizou-se: (1) coletas, seguindo procedimentos tafonômicos, (2) análises tafonômicas, (3) descrição de tafofácies, (4) identificação taxonômica e (5) interpretação paleoambiental. A análise tafonômica permitiu a caracterização de cinco tafofácies primariamente biogênicas, depositadas em condições de tempestades, que exibem em geral: fragmentação, variação de tamanho e distribuição complexa e caótica de bioclastos, tanto em planta como em seção e contatos bruscos e erosivos. Foram identificados gastrópodes da família Epitoniidae e do género Cerithi...
The phylum Mollusca includes one of the most beautiful examples of colour patterns in present-day... more The phylum Mollusca includes one of the most beautiful examples of colour patterns in present-day shells. However, they are rare in the fossil record because they demand excellent fossilization. In Brazil, colour patterns in fossil mollusk shells are recorded in gastropods Natica aff. bulbulus White, 1887 from the Riachuelo Formation (Aptian-Albian), Sergipe-Alagoas Basin. This paper presents the first gastropod shells from the Romualdo Formation with colour patterns, visible under natural and UV light, belonging to the families Naticidae and Cassiopidae, collected at Santo Antônio outcrop municipality of Exu, Pernambuco and, Pinheiro and Serra do Mãozinha sites, municipality of Missão Velha and Romualdo site, municipality of Crato, Ceará. Among the cassiopids more than 100 specimens were tested, with 1/3 of them showing a residual colour pattern under UV light exposure, after chemical preparation. They correspond to the species Paraglauconia (Diglauconia) araripensis (Beurlen, 1964...
A systematic study is made of Early Cretaceous (late Aptian/earlyAlbian) ostracod assemblages fro... more A systematic study is made of Early Cretaceous (late Aptian/earlyAlbian) ostracod assemblages from the Santo Antônio section. This section is characterized by sediment belonging to the post-rift sedimentary sequence of the Romualdo Formation in the southern-central region of the Araripe Basin, Brazil and represents on of the first marine ingression in the interior of the continent, during the beginning of the formation of the Atlantic Ocean. The Santo Antonio section presents ostracods in greater diversity than previously known. Nineteen samples were analyzed, yielding a total of 8,370 specimens. Fifteen taxa were identified, including six brackish ostracods: Pattersoncypris salitrensis, Pattersoncypris angulata, Pattersoncypris micropapillosa, Damonella grandiensis, Alicenula cf. leguminella and Theriosynoecum cf. quadrinodosum; and nine typically brackish-marine species, including seven new ones: Dicrorygma cf. minuta, Dicrorygma (Orthorygma?) dimorpha, Mongolianella aptianensis s...
The Museu de Ciências Naturais e de História Barra do Jardim was created on October 27, 2001 and ... more The Museu de Ciências Naturais e de História Barra do Jardim was created on October 27, 2001 and has the mission of rescuing, preserve and promoting local culture. It is located in the urban and historical area of the municipality of Jardim and belongs to the Francisco de Lima Botelho Foundation. The geological importance of the municipality is widely known in the context of the Araripe Sedimentary Basin for the classic outcrops of the Romualdo Formation, such as Sobradinho Site, and for the reasonable presence of fossils. Despite this, the municipality is not included in territory of the Araripe Global Geopark, but still has the support of various segments of society to preserve and promote its historical and natural heritage, the fossils of the Araripe Sedimentary Basin. This work aims to present the paleontological collection of the museum, which currently has 375 specimens cataloged with data on geological and geographical origin, specific taxonomic identification or at higher levels (phyla, genus or family), and in many cases, collector and date of collection. The paleontological collection consists mostly of fish (62.2%), followed by plants (10%), reptiles (7.7%), in addition to ichnofossils (8.2%), arthropods (5.8%), molluscs (4%) and others (3%), including the crustacean holotype Araripenaeus timidus. This collection reflects the fossiliferous diversity of the Romualdo Formation, coming from 11 sites in the municipality of Jardim, including collections from Avenida Wilson Roriz, in the city center. The collection began with the clarification of the population on the scientific and cultural value of natural heritage, and an example of heritage education, by strengthening the relationship of people with their cultural heritage. The museum houses not only fossil specimens for research that are relevant to the knowledge of paleontology in the Araripe Sedimentary Basin, but also constitutes a place of regional public visitation with an educational, cultural and tourist effect.
The unusual association of fish and crabs from Romualdo Formation, Aptian–Albian of the Araripe s... more The unusual association of fish and crabs from Romualdo Formation, Aptian–Albian of the Araripe sedimentary Basin, NE Brazil. In a study and collection of fossils from the Romualdo Formation in “Araripe pernambucano”, an association of Vinctifer comptoni and Rhacolepis buccalis with eubrachyurans and orithopsids crabs was observed in four calcareous nodules. Associations were discussed based on ecological and taphonomic hypotheses. It is noted from the degree of articulation of the organisms, that either the death or the availability of crab moults in the sediment possibly occurred before the death of the fish. In addition, the fish do not have teething consistent with feeding on crabs. Thus, this association would occur due to fossilization processes and not due to ecological interactions. The study also emphasized systematic and paleogeographic aspects of the groups. Romualdocarcinus salesi is probably related to the “higher” true crabs (Eubrachyura), a hypothesis already raised i...
Brachyurans played important ecological and evolutionary roles in the marine benthic communities ... more Brachyurans played important ecological and evolutionary roles in the marine benthic communities of the past and were the components of the Mesozoic Decapod Revolution. Therefore, the search for their fossil remains is fundamental to understanding the composition, diversity, and ecological structure of Mesozoic marine benthic communities. Brachyuran remains are uncommon in the decapod record of the Aptian Romualdo Formation in the Araripe Basin. In this context, we recorded and described new occurrences of Exucarcinus gonzagai, preserved in shales from the middle portion of the Romualdo Formation, near the city of Jardim in the State of Ceara. Comparisons between these new specimens and former specimens from the Exu locality, State of Pernambuco, including the type material, allowed us to recognize, for the first time, three distinct ontogenetic stages (i.e., informally referred as I, II, and III). Throughout ontogenetic development, the carapace becomes wider and spinier. Stage III...
RESUMO Na Bacia Sedimentar do Araripe, as rochas que caracterizam a Formação Romualdo, Neoaptiano... more RESUMO Na Bacia Sedimentar do Araripe, as rochas que caracterizam a Formação Romualdo, Neoaptiano-Eoalbiano (Cretáceo Inferior), tiveram sua deposição em ambiente lagunar com influência marinha. No distrito de Brejinho, porção noroeste da bacia, município de Araripe (CE), foi encontrado um afloramento da Formação Romualdo, com concentração de conchas de moluscos (gastrópodes e biválvios) que possibilitou estudos tafonômicos. Nesse local, realizou-se: (1) coletas, seguindo procedimentos tafonômicos, (2) análises tafonômicas, (3) descrição de tafofácies, (4) identificação taxonômica e (5) interpretação paleoambiental. A análise tafonômica permitiu a caracterização de cinco tafofácies primariamente biogênicas, depositadas em condições de tempestades, que exibem em geral: fragmentação, variação de tamanho e distribuição complexa e caótica de bioclastos, tanto em planta como em seção e contatos bruscos e erosivos. Foram identificados gastrópodes da família Epitoniidae e do género Cerithi...
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aims to present the paleontological collection of the museum, which currently has 375 specimens cataloged with data on geological
and geographical origin, specific taxonomic identification or at higher levels (phyla, genus or family), and in many cases, collector and
date of collection. The paleontological collection consists mostly of fish (62.2%), followed by plants (10%), reptiles (7.7%), in addition
to ichnofossils (8.2%), arthropods (5.8%), molluscs (4%) and others (3%), including the crustacean holotype Araripenaeus timidus.
This collection reflects the fossiliferous diversity of the Romualdo Formation, coming from 11 sites in the municipality of Jardim,
including collections from Avenida Wilson Roriz, in the city center. The collection began with the clarification of the population on the
scientific and cultural value of natural heritage, and an example of heritage education, by strengthening the relationship of people with
their cultural heritage. The museum houses not only fossil specimens for research that are relevant to the knowledge of paleontology in
the Araripe Sedimentary Basin, but also constitutes a place of regional public visitation with an educational, cultural and tourist effect.
aims to present the paleontological collection of the museum, which currently has 375 specimens cataloged with data on geological
and geographical origin, specific taxonomic identification or at higher levels (phyla, genus or family), and in many cases, collector and
date of collection. The paleontological collection consists mostly of fish (62.2%), followed by plants (10%), reptiles (7.7%), in addition
to ichnofossils (8.2%), arthropods (5.8%), molluscs (4%) and others (3%), including the crustacean holotype Araripenaeus timidus.
This collection reflects the fossiliferous diversity of the Romualdo Formation, coming from 11 sites in the municipality of Jardim,
including collections from Avenida Wilson Roriz, in the city center. The collection began with the clarification of the population on the
scientific and cultural value of natural heritage, and an example of heritage education, by strengthening the relationship of people with
their cultural heritage. The museum houses not only fossil specimens for research that are relevant to the knowledge of paleontology in
the Araripe Sedimentary Basin, but also constitutes a place of regional public visitation with an educational, cultural and tourist effect.