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Rimella macilenta
Taxonomy
Rimella macilenta was named by White (1889). It is the type species of Macilentos.
It was recombined as Ectinochilus (Macilentos) macilenta by Clark and Palmer (1923) and Squires and Demetrion (1992); it was recombined as Rimella (Macilentos) macilenta by Turner (1938); it was recombined as Ectinochilus (Macilentos) macilentus by Squires (1984), Squires (1987) and Squires (1988).
It was recombined as Ectinochilus (Macilentos) macilenta by Clark and Palmer (1923) and Squires and Demetrion (1992); it was recombined as Rimella (Macilentos) macilenta by Turner (1938); it was recombined as Ectinochilus (Macilentos) macilentus by Squires (1984), Squires (1987) and Squires (1988).
Sister species lacking formal opinion data
Synonymy list
Year | Name and author |
---|---|
1889 | Rimella macilenta White p. 449 figs. PLATE III, Figs. 10-12 |
1923 | Ectinochilus (Macilentos) macilenta Clark and Palmer p. 280 |
1938 | Rimella (Macilentos) macilenta Turner p. 94 |
1984 | Ectinochilus (Macilentos) macilentus Squires p. 21 |
1987 | Ectinochilus (Macilentos) macilentus Squires p. 33 fig. 36 |
1988 | Ectinochilus (Macilentos) macilentus Squires p. 12 fig. 21 |
1992 | Ectinochilus (Macilentos) macilenta Squires and Demetrion p. 30 |
2013 | Rimella macilenta Squires p. 828 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Rimella macilenta White 1889
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Diagnosis
Reference | Diagnosis | |
---|---|---|
R. L. Squires 2013 | Shell size medium; last whorl commonly with 12 narrow axial ribs, moderately closely spaced; spiral ribs numerous, closely spaced, and commonly weak; posterior canal ascends spire up to, or covering, shell apex and descends short distance onto spire. |
Measurements
No measurements are available
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Source: f = family, c = class | |||||
References: Kiessling 2004, Hendy et al. 2009 |
Age range: base of the Early/Lower Eocene to the top of the Middle Eocene or 55.80000 to 37.20000 Ma
Collections (66 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Ypresian | USA (California) | Ectinochilus macilentus (178718 178748 178749 194164) Rimella macilenta (122656 178690 209635 209636 209637 209638 209640) Rimella simplex (122294) | |
Ypresian | USA (Oregon) | Rimella macilenta (200796 200800 200804) | |
Ypresian | USA (Washington) | Ectinochilus macilentus (146900 146901) | |
Ypresian - Lutetian | USA (Oregon) | Ectinochilus macilenta (37871) | |
Ypresian - Lutetian | USA (California) | Ectinochilus macilentus (8011 8014 8017 8018 200143 200144 200289 205251) | |
Early/Lower Eocene | USA (California) | Ectinochilus macilentus (111552) | |
Middle Eocene | USA (California) | Ectinochilus macilentus (194431 194441) | |
Lutetian | USA (Oregon) | Rimella macilenta (200880 200890 200895 200912 201033 201040 201041) | |
Lutetian | USA (California) | Ectinochilus macilentus (5527 5532 5533 5540 5541 5542 5543 8012 8013 8015 178733 178777 200718 200720 200838 200839 200845 200848 201239 201262 201691 201693 201700 201702 207149 207162 207176 207177) | |
Bartonian | USA (Oregon) | Ectinochilus macilenta (37870) | |
Priabonian | USA (California) | Rimella macilenta (208042) |