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> Amiocentrus aspilus

Millcreek	March 6th, 2015, 11:08 am
Healdsburg, CA Posts: 356	These are common in the Russian River and Mill Creek. They're usually present from February through June. These were keyed out using Merritt, Cummins and Berg (2008). The first few pictures were taken of specimens preserved in alcohol and they have lost most of their color. The pictures were taken to show some of the features which separate them from Brachycentrus and Micrasema spp. Cases are approximately 15 mm long and larvae about 10 mm long. They're usually found on torrent sedge or algae laden rocks.
Martinlf	March 6th, 2015, 12:12 pm
Moderator Palmyra PA Posts: 3233	features which separate them from Brachycentrus and Micrasema spp. Mark, could you elaborate, specifying those features? Also thanks again for the photos. Stunning.
	"He spread them a yard and a half. 'And every one that got away is this big.'" --Fred Chappell
Millcreek	March 6th, 2015, 1:51 pm
Healdsburg, CA Posts: 356	Mark, could you elaborate, specifying those features? Brachycentrus would have different legs, with a longer femora and a tibia with a prominent spur. Micrasema would have the pronotal groove curving anteriorly, with the ends of the groove usually meeting the anterior margin. Amiocentrus would have a shorter femora, a tibia without a prominent spur, the ends of the pronotal groove not meeting the anterior margin and a mesonotal sa1 with a solitary setae on each side.
Crepuscular	March 7th, 2015, 7:09 am
Boiling Springs, PA Posts: 923	Nice post Mark! I see a fair number of Micrasema here in PA. I love seeing your western bugs!
Gutcutter	March 7th, 2015, 9:48 am
Pennsylvania Posts: 470	Way cool! Great photos, as usual, Mark
	All men who fish may in turn be divided into two parts: those who fish for trout and those who don't. Trout fishermen are a race apart: they are a dedicated crew- indolent, improvident, and quietly mad. -Robert Traver, Trout Madness
Millcreek	March 7th, 2015, 10:10 am
Healdsburg, CA Posts: 356	Eric and Gutcutter- Thanks, glad you enjoyed them.

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