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Eucyrtidium inflatum
Kling, 1973
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Description - Add description
Eucyrtidium inflatum
Cephalis subspherical to hemispherical, with sparce circular pores; bears a tiny apical spine which is inconspicuous or lacking in many specimens. Collar stricture indistinct. Thorax slightly inflated conical, moderate rough-surfaced, with longitudinal ribs on lower part separating longitudinal rows of circular pores. Lumbar stricture distinct. Abdomen and one or more post- abdominal segments define characteristic inflated, truncate fusiform section of the test without externally expressed strictures. Pores in this section are circular, arranged in strict longitudinal rows separated by distinct, sharp-crested ridges. Widest part of shell in abdomen or spanning division between abdomen and fourth segment. In some specimens, gentle stricture separates symmetrical fusiform section from fragmentary lower chamber.
Dimensions: Based on 15 specimens from 173-25-5 (50-52 cm) and 173-22-2 (57-59 cm), maximum width 80-94µ, length of cephalis to distal end of thorax 36-44µ, to end of abdomen, 90-100µ, to end of fourth segment 120-136µ; abdominal pores, minimum 2-4µ, maximum 5-9µ, average close to maximum.
Remarks: This species differs from E. calvertense in the inflated fusiform section of the shell and relatively large and widely spaced pores. E. calvertense is seldom widest at the abdomen, as E. inflatum nearly always is. E. matuyamai is larger and inflated at more distal segments.
[note similar species E. pseudoinflatum Weaver 1983 in Antarctic late Miocene sediments - dbl] | | Kling 1973 |
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