a1592 R. Greene Frier Bacon (1594) sig. G The flies Hæmere..take life with the Sun, and die with the dew.

1613 H. Austin tr. Ovid Scourge of Venus sig. B5 As the flies Hæmere we do see, To leaue their breath their life being scarce begunne.

1893 S. S. Buckman in Q. Jrnl. Geol. Soc. 49 481 For a palaeontological purpose... I propose the term ‘hemera’... I wish to use it as the chronological indicator of the faunal sequence.

1898 S. S. Buckman in Q. Jrnl. Geol. Soc. 54 443 The shortest geological time-division is a hemera: that is, the time during which a particular species..had dominant existence.

1898 S. S. Buckman in Q. Jrnl. Geol. Soc. 54 448 The genera Dactylioceras and its allies..almost disappear with the close of the hemera bifrontis.

1902 S. S. Buckman in Geol. Mag. Dec. 555 A ‘hemera’ was designed to mark the time from..when one species or set of species becomes dominant to the time when another..does so.

1920 Q. Jrnl. Geol. Soc. 76 63 The range of strata which Mr. Richardson has divided into seven or at the most eight hemeræ cover, according to my more detailed subdivisions, thirty-two hemeræ, and should afford a good test as to whether this more detailed method of dating makes for greater precision.

1933 W. J. Arkell Jurassic Syst. Great Brit. i. 20 Nine years later, finding that there were still some who considered that a hemera was simply a subdivision of a zone, Buckman published a fresh explanation.

1966 D. T. Donovan Stratigr. vii. 160 Several other time terms have been proposed but have never achieved general recognition. Perhaps the most notorious is the hemera.

1966 D. T. Donovan Stratigr. vii. 161 Hemerae were much used by English Jurassic workers for about forty years, but hardly at all by anyone else.

1898 S. S. Buckman in Q. Jrnl. Geol. Soc. 54 443 The hemeral names are taken from the names of ammonites.

1933 W. J. Arkell Jurassic Syst. Great Brit. i. 27 In the course of an argument with Buckman over his insertion of an excessive number of hemeræ into the time-table of the Corallian rocks, I attempted to justify my view..that many of his hemeral indices lived side by side on the same sea-bed.