Category Archives: Biology

Stalked puffball-in-aspic (Calostoma cinnabarinum)

Here’s a gooey, mysterious find from my trip to Mohonk Mountain House over Thanksgiving. 

It took me a while to identify, but it’s a stalked puffball-in-aspic (Calostoma cinnabarinum), an ectomycorrhizal boletes that is associated with oak tree roots. It has a number of amusing common names such as hot lips and pretty lips. This one was growing around a pine tree, so perhaps they are flexible about their symbiotic partner. It’s also possible that roots from distant oaks extended to this location (there are some leaves in the frame). But I think the former is more likely, partly because I found a paper (Bautista-Nava and Moreno-Fuentes 2009) that says they grow in pine forests in Mexico. But that paper is in Spanish, which I cannot read, so I could have that wrong.

Copulating stilt-legged flies

Copulating pair of Taeniaptera trivittata, a type of still-legged fly (Micropezidae). 

Males (or females, according to one source) apparently brush the eyes of the partner during mating, though this frame didn’t capture that. When flitting around leaves they wave their white-tipped forelegs and look just like small ichneumon wasps. They have thin waists but the pattern on their wings makes them look even thinner, waspier. Known to feed on rotting Typha, which was abundant nearby (John Heinz National Wildlife Refuge, Tinicum, PA).

Thanks to John S. Ascher and John F. Carr on Bugguide.net for help identifying them.