Tadpole shrimp (genus Triops, probably longicaudatus). Stock pond at El Malpais National Monument, Cibola Co., New Mexico, USA.
Triops longicaudatus is apparently the common widespread Triops in most of NM (B. Lang, pers. comm.).
The molts from these are common along the edges of the vernal pool
vernal pool restoration site
Muskrat at Discovery pond; one water boatman and a couple of damselfly or mayfly larvae and a few fairy shrimp. Not much else in the pond.
At pond: fairy shrimp
Love the vernal pool fauna! This one was in a pothole under Shrimp Rock on the Slickrock Trail. It's getting really cold at night--these guys better grow fast...
Forked tail, so I guess it's Triops rather than Lepidurus. T. longicaudatus is the most common species in the area, so I assume that's it.
in 2010 we had enough rain to fill the ephemeral pond
The order Notostraca comprises the single family Triopsidae, containing the tadpole shrimp or shield shrimp. The two genera, Triops and Lepidurus, are considered living fossils, having not changed significantly in outward form since the Triassic. They have a broad, flat carapace, which conceals the head and bears a single pair of compound eyes. The abdomen is long, appears to be segmented and bears numerous pairs of flattened legs. The telson is flanked by a pair of...