Complex sentence: It is probably this species which they depicted on medals found at Agrigento, Sicily; more recently, the species was depicted on the 5 ¢coin in the last series of Maltese coins before the introduction of the Euro there in 2007.
Split into simpler sentences: It is probably this species which they depicted on medals found at Agrigento, Sicily. More recently, the species was depicted on the 5 ¢coin in the last series of Maltese coins before the introduction of the Euro there in 2007.