Tag Archives: Bembidion

Sculpture on a very small scale

If one looks up close onto the back of a carabid beetle, one will see (in most species) very fine, engraved lines which form a pattern, usually looking like honeycombs, or bricks, or long, thin parallel lines.  This is called … Continue reading

Posted in Revising Bembidiina | Tagged , , , | Leave a comment

BotW: Bembidion poculare

This Bembidion is common in oak woodlands in southern Arizona.  It is not directly associated with a body of water (which is unusual for a Bembidion), instead living between oaks and mesquite trees where the soil is slightly damp (perhaps in … Continue reading

Posted in Beetle of the Week | Tagged | Leave a comment

Pretty heads and furrowed brows

What is it about Bembidion heads?  And, in particular, what is it with the heads of one subgroup of Bembidion, the Bembidion Series?  The Bembidion Series is a large clade of few hundred species, and represents perhaps a quarter of … Continue reading

Posted in Revising Bembidiina | Tagged , , | 4 Comments

The mysterious Bembidion ulkei

In Carl Lindroth’s (1963) classic work on the Bembidiina of Canada and Alaska, he describes some species that do not occur in Canada or Alaska.  These species were always a source of some mystery to me when I was a … Continue reading

Posted in Revising Bembidiina, Taxonomic Process | Tagged | 1 Comment

Wicked and confused Bembidion

There are over 1200 known species of Bembidion.  Many of them are hard to tell apart.  They are small beetles.  Maybe for this reason some taxonomists have struggled with them, and their frustration occasionally is expressed when they name new … Continue reading

Posted in Taxonomic Process | Tagged , | 1 Comment

Delightful DNA

Well, it looks as if Bembidion (Plataphus) curtulatum is at least three species.  The above bits of DNA show parts of 28S ribosomal DNA.  Of the 950 bases that were sequenced, this shows only those sites that differ from one … Continue reading

Posted in Revising Bembidiina, Taxonomic Process | Tagged , | 3 Comments

BotW: Bembidion confusum

The Beetle of the Day today is Bembidion confusum.  This is a common species on sandy river and pond shores east of the Rockies in North America.  It’s the species whose head appears on the “Subulate Palpomere” sign.

Image | Posted on by | Tagged | 2 Comments

A live revision

Over the course of the next three years, some of us (me, John Sproul, and others) in the Maddison Lab will be “revising” the Bembidiina of North America.  This means we will be going into the field in the USA … Continue reading

Posted in Revising Bembidiina | Tagged | Leave a comment

BotW: A brilliant Bembidion

This is a lovely but unnamed Bembidion from Arizona and New Mexico, first found by George Ball in the 1960s. I lives under willows on the banks of rivers. It is much easier to find at night (using a headlamp) … Continue reading

Image | Posted on by | Tagged | 3 Comments