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Author:
Lister,T.R.;Downie,C.
Year:
1967
Title:
New evidence for the age of the primitive Echinoid Myriastiches gigas
Reference:
Lister,T.R. et al. (1967) New evidence for the age of the primitive Echinoid Myriastiches gigas Palaeontology Vol. 10 # 2 P. 171- 174
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Genus Species Country(Region) From To
Helios Helios aranaides Nd Early Ludlovian
Leiofusa Leiofusa filifera Nd Early Ludlovian
Leiosphaeridia Leiosphaeridia wenlockia Nd Early Ludlovian
Lophosphaeridium Lophosphaeridium granulosum Nd Early Ludlovian
Micrhystridium Micrhystridium imitatum Nd Early Ludlovian
Micrhystridium Micrhystridium nannacanthum Nd Early Ludlovian
Micrhystridium Micrhystridium parinconspicuum Nd Early Ludlovian
Micrhystridium Micrhystridium shinetonense Nd Early Ludlovian
Micrhystridium Micrhystridium stellatum Nd Early Ludlovian
Polyedryxium Polyedryxium pharaone Nd Early Ludlovian
Pterospermopsis Pterospermopsis onondagaensis Nd Early Ludlovian
Punctatisporites Punctatisporites dilutus Nd Early Ludlovian
Rhabdochitina Rhabdochitina magna Nd Early Ludlovian
Sphaerocephala Sphaerocephala pistilliformis Nd Early Ludlovian
Sphaerochitina Sphaerochitina sphaerocephala Nd Early Ludlovian
Veryhachium Veryhachium formosum Nd Early Ludlovian
Veryhachium Veryhachium radiosum Nd Early Ludlovian