Roundyella Ovatiformis
''Roundyella'' is an extinct genus of ostracod (seed shrimp) belonging to the order Leperditellocopida and family Scrobiculidae. Specimens have been found in beds of Devonian to Triassic age in Australia, Asia, Europe, North America, and South America. Species *''Roundyella bellatula'' Bradfield 1935 *''Roundyella dorsopapillosa'' Sohn 1954 *''Roundyella kroemmelbeini'' Kozur 1985 *''Roundyella lebaensis'' Krommelbein 1958 *''Roundyella ludbrookae'' Fleming 1985 *''Roundyella neopapillosa'' Ishizaki 1964 *''Roundyella ovatiformis'' Hou 1954 *''Roundyella papilliformis'' Wang 1978 *''Roundyella simplex'' Girty 1910 *''Roundyella simplicissima'' Knight 1928 References

Paleozoic life Ostracods Prehistoric ostracod genera {{Ostracod-stub ...
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Devonian
The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian period at million years ago (Megaannum, Ma), to the beginning of the succeeding Carboniferous period at Ma. It is the fourth period of both the Paleozoic and the Phanerozoic. It is named after Devon, South West England, where rocks from this period were first studied. The first significant evolutionary radiation of history of life#Colonization of land, life on land occurred during the Devonian, as free-spore, sporing land plants (pteridophytes) began to spread across dry land, forming extensive coal forests which covered the continents. By the middle of the Devonian, several groups of vascular plants had evolved leaf, leaves and true roots, and by the end of the period the first seed-bearing plants (Pteridospermatophyta, pteridospermatophyt ...
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