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Carpatella reticulata
Type species: Carpatella cornuta (Grigorovich, 1969) Damassa, 1988.
Derivation of the name: Refers to the distinct reticulum of the cyst surface.
Diagnosis: The cyst’s general morphology allows this species to be assigned to the genus Carpatella. The ovate autophragm has apical and antapical horns and a precingular archeopyle (Stover and Evitt, 1978). The cingulum is not present.
Description: Acavate, ovoidal, proximate, dinoflagellate cyst characterized by a precingular archeopyle type P (3″) and one apical and one antapical horn formed by the autophragm. The apical horn is broad and conical, with an angular tip and an extensive subrounded base. The antapical horn is small, thin, and with a sub-rounded tip. The archeopyle is large and has a sub-pentagonal outline). The autophragm is ornamented with a coarse reticulum. Tabulation and cingulum are not visible.
Dimensions: central body: height 70 μm; width 60 μm; wall thickness: 2–3 μm; length apical horn: 20 μm; length antapical horn: 7 μm.
Observed range: Central body: height: 70–80 μm; width 60–75 μm; wall thickness: 2–3 μm; length apical horn: 10–20 μm; length antapical horn: 7–10 μm. Number of species measured: 6.
Differentiation: C. reticulata sp. nov. can be easily distinguished from other species of Carpatella due to its unique reticulate surface. Additionally, its subconical apical horn differs from the subrounded apical horn of C. cornuta Grigorivich, 1969a. Also, C. reticulata sp. nov. lacks tabulation, which sets it apart from C. septata Willumsen, 2004, which has visible tabulation.
Type locality: Southern Gulf of Mexico, Campeche escarpment, offshore Yucatan peninsula, Site 94 DSDP-Leg 10.
Type level: Early – Middle Eocene.
Range: Occurrence in one sample of the Early-Middle Eocene (539mbsf)
Derivation of the name: Refers to the distinct reticulum of the cyst surface.
Diagnosis: The cyst’s general morphology allows this species to be assigned to the genus Carpatella. The ovate autophragm has apical and antapical horns and a precingular archeopyle (Stover and Evitt, 1978). The cingulum is not present.
Description: Acavate, ovoidal, proximate, dinoflagellate cyst characterized by a precingular archeopyle type P (3″) and one apical and one antapical horn formed by the autophragm. The apical horn is broad and conical, with an angular tip and an extensive subrounded base. The antapical horn is small, thin, and with a sub-rounded tip. The archeopyle is large and has a sub-pentagonal outline). The autophragm is ornamented with a coarse reticulum. Tabulation and cingulum are not visible.
Dimensions: central body: height 70 μm; width 60 μm; wall thickness: 2–3 μm; length apical horn: 20 μm; length antapical horn: 7 μm.
Observed range: Central body: height: 70–80 μm; width 60–75 μm; wall thickness: 2–3 μm; length apical horn: 10–20 μm; length antapical horn: 7–10 μm. Number of species measured: 6.
Differentiation: C. reticulata sp. nov. can be easily distinguished from other species of Carpatella due to its unique reticulate surface. Additionally, its subconical apical horn differs from the subrounded apical horn of C. cornuta Grigorivich, 1969a. Also, C. reticulata sp. nov. lacks tabulation, which sets it apart from C. septata Willumsen, 2004, which has visible tabulation.
Type locality: Southern Gulf of Mexico, Campeche escarpment, offshore Yucatan peninsula, Site 94 DSDP-Leg 10.
Type level: Early – Middle Eocene.
Range: Occurrence in one sample of the Early-Middle Eocene (539mbsf)