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Middle Silurian animals (Time series) - Wildlife in the Fossil sites

Classified animal and plant picture guide. Clicking the Organism name shows the images, and pointing the Organism name shows the tooltip with three links at the left-top corner.
The Middle Silurian in Paleozoic spanned from 428 to 423 millon years ago. The explanation in brackets is the ages they lived in extinct species. Note that Mya is million years ago. For example, "48.6～40.4 Mya" shows a range between 48.6 and 40.4 million years ago. The italic and bold figures, e.g. 488, show out of the range. The time range is shown in the Geological Time Table. The followings are a part of the Evolutionary Tree.
Silurian, Early Silurian, Middle Silurian、Late Silurian
The right map is the continents at Middle Silurian provided by C. R. Scotese PALEOMAP Project.
428.2 Mya
428.2～426.2 MyaJawless fishPharyngolepis  
428.2～422.9 MyaTrilobiteTapinocalymene  
428.2～421.3 MyaMolluscPilina
TrilobiteDidrepanon
428.2～418.7 MyaSea budTroosticrinus
Jawless fishPhlebolepis, Birkenia  , Ateleaspis  
428.2～418.1 MyaSea scorpionMixopterus  
428.2～412.3 MyaJawless fishCyathaspis  
428.2～409.1 MyaTrilobiteApocalymene
Sea scorpionDolichopterus
428.2～359.2 MyaCoralDisphyllum  
428.2～0 MyaSnail(Pleurotomaria)   (Great Dying②③④⑤)
426.2 Mya
426.2～425.4 MyaTrilobiteContracheirurus
426.2～422.9 MyaTrilobiteOnycopyge  
426.2～418.7 MyaJawless fishWitaaspis, Tremataspis  
426.2～418.1 MyaSea budPseudocrinites
CystoidPseudocrinites
Jawless fishHemicyclaspis  
426.2～412.3 MyaSea scorpionErieopterus
426.2～383.7 MyaFirst land plant fossil
Vascular plantCooksonia   (Primitive land plant)