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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Scarabaeoidea » Scarab Beetles (Scarabaeidae) » May Beetles and Junebugs (Melolonthinae) » Melolonthini » Lined June Beetles (Polyphylla) » Polyphylla crinita
Photo#1178478
Polyphylla decemlineata - Polyphylla crinita
Copyright © 2015 Jim Johnson

Polyphylla decemlineata - Polyphylla crinita
Vancouver, Clark County, Washington, USA
July 18, 2014
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Contributed by Jim Johnson on 31 December, 2015 - 2:48pm
Last updated 16 July, 2021 - 1:47pm

Moved
Moved from Ten-lined June Beetle.
… Andrew Smith, 16 July, 2021 - 1:47pm login or register to post comments

Polyphylla crinita
… Andrew Smith, 15 July, 2021 - 5:30pm login or register to post comments

 
How identified?
I am not disagreeing with you, but I'm just curious to know how the species are differentiated. Seems like there has been a lot of confusion over species in this genus.
… Jim Johnson, 15 July, 2021 - 5:42pm login or register to post comments

 
For this particular specimen,
For this particular specimen, the redder base colour of the pronotum compared to the elytra along with the locality indicate P. crinita. Based on my examination of museum specimens and iNat and BG photos, P. crinita is by far the most common and widespread species in the Pacific Northwest and BC. Polyphylla decemlineata has been confused with many different species of Polyphylla, especially west of the Rockies. The species concepts I am using are from Young (1988) but there are still taxonomic problems with this genus that need to be resolved. See:
https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1036&context=museumbulletin
… Andrew Smith, 16 July, 2021 - 1:47pm login or register to post comments

 
Thanks!
I appreciate it.
… Jim Johnson, 17 July, 2021 - 10:18am login or register to post comments

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