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Species Globigerina druryi Akers 1955 | ||||||
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Iaccarino (1985): According to Aker's description the small size, the rounded and lobate periphery, the coarsely perforate wall and the small, low arched and thin lipped aperture are the major distinctive features of the species. According to Blow (1969), G. druryi is the ancestor of G. nepenthes, while Brönnimann & Resig (1971) consider G. druryi closer to G. falconensis. G. falconensis. as described and figured by Blow (1959) differs from G. druryi in its larger size, in the much more developed apertural lip and in the flatter trochospire. G. pseudodruryi and G. nepenthoides both described by Brönnimann & Resig (1971) are here included in G. druryi. The creation of the two taxa hardly appears justified, taking into account the variability of the species. Early forms of G. druryi range stratigraphically lower than recorded by Blow (1969). Their occurrence is consistent with the range of G. pseudodruryi and G. nepenthoides. Srinivasan (1975): Distinguished by its smaller size and arched aperture bordered by a distinct lip. Brönnimann and Resig (1971) considered Globigerina druryi to be closer to G. falconensis than to G. nepenthes. In the examined samples, G. druryi appears to grade upward into G. nepenthes. Chaisson & Leckie (1993): Similar species: Typical Globigerina nepenthes are not common at this site, and early forms of G. nepenthes and late forms of G. druryi are gradational in their interval of stratigraphic overlap. Globigerina woodi gives rise to both G. druryi and G. connecta in the lower Miocene (Kennett and Srinivasan, 1983), and transitional forms between these three species may be difficult to distinguish (e.g., see Plate 1, Fig. 16). Although G. connecta and G. druryi are both derived from sensu stricto G. woodi through the lowering of the arch of the primary aperture, G. druryi has a much heavier lip over the aperture and a distinctly more lobate equatorial outline than G. connecta. |
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| Synonym list: | ||||||
| Iaccarino (1985): 1955 Globigerina druryi Akers. - Akers : p.654 pl. 65, figs. 1a-c
1985 Globigerina druryi Akers. - Iaccarino : p.301 figs. 5.1a-c; 4
Srinivasan (1975): 1955 Globigerina druryi Akers. - Akers : p.654 Pl. 65: Fig. 1a-c
1975 Globigerina druryi Akers. - Srinivasan : p.143 Pl. 1; Fig. 4
Chaisson & Leckie (1993): 1955 Globigerina druryi Akers. - Akers : p.654 pl. 65; fig. 1
1983 Globigerina (Zeaglobigerina) druyi Akers. - Kennett & Srinivasan : p.46 pl. 8; fig. 7-9
1993 Globigerina druryi Akers. - Chaisson & Leckie : p.169 pl. 1; fig. 10-11
Quilty (1976): 1955 Globigerina druryi Akers. - Akers : p.654 pl. 65, figs. 1A-C
1976 Globigerina druryi Akers. - Quilty : p.669 pl. 2, figs. 9-10
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| Was used in synonym list of: | ||||||
| References: | ||||||
Akers,W.H. (1955): Srinivasan,M.S. (1975): Quilty,P.G.. (1976): Kennett,J. and Srinivasan,M.S. (1983): Iaccarino,S. (1985): Chaisson,W.P. and Leckie,R.M. (1993): |
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| Anonymous: Unedited TaxonConcept data | ||||||
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