dshubble's picture

Weevil found with bird-food

Observed: 3rd December 2010 By: dshubble
Leaf Beetle Recording SchemeSouthampton Natural History Society
Invertebrates expert
sitophilus1a
sitophilus1b
sitophilus1c
Description:

Six found under the rim of a tub of dried mealworms in a hardware shop; four alive, two dead.

Identifications
Species interactions

No interactions present.

Comments

markgtelfer's picture

Dissection job

To quote DGH Halstead (1963) "separation of the species [Sitophilus oryzae and S. zeamais] can be achieved with certainty only by examining the genitalia". Good illustrations of the bits of males and females in his paper in EmM 99: 72-74.

I've only found S. zeamais in the local pet shop but used to have S. oryzae in the kitchen of a previous residence.

dshubble's picture

Sitophilus

I quite agree - I've kept the two specimens I brought home, so if/when I get round to the dissection, this may get changed or made more certain...

Dave

dshubble's picture

Dissection done

Just dissected the weevil; the dorsal side of the median lobe is smooth without longitudinal sulci - this makes it S. oryzae,

Dave

dejayM's picture

history

I browse history, more of us should do that.
My 2015 agreement is based on Dave' assertion and 15 informative minutes 'in' the WebThing.
"4 yellow marks on the elytra.." (Pic1)
http://www.cabi.org/isc/datasheet/10887
http://www.yourarticlelibrary.com/zoology/rice-weevil-sitophilus-oryzae-...
ðJ