鉴定特征 美国常见品种的蛇类。Tricoloured Hognose Snakes are a mildly venomous, small colubrid species with an upturned snout which is used for digging. A species which is generally most active at dawn & dusk (cre
维基百科
Odontartemon is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Streptaxidae.[2]
Odontartemon is the type genus of the subfamily Odontartemoninae.
维基百科
Potamilus alatus is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, commonly known as the river mussels.
This species is native to eastern North America. I
