Journal of Paleontology, Vol. 80, No. 5 (Sep., 2006), pp. 981-992 (12 pages) Two new species of scutelluine styginid trilobites are described from Frasnian strata in the Virgin Hills Formation in the ...

Recent discoveries of long-gone marine invertebrates call into question the occurrence of a catastrophic global extinction hundreds of millions of years ago. The loss of diversity wasn’t as widespread ...

Figure 1. A: Scheme of Frasnian-Famennian (F-F) global event and two-step Kellwasser crisis (based on Gereke and Schindler, 2012), and related volcanic events after Winter (2015, his figure 2). B: ...

The late Devonian extinction, about 370 million years ago, is one of the 'Big Five.' It killed up to 80 percent of species, obliterating the lavish Devonian coral reef ecosystem. The final pulse in ...

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