Aphids - Periphyllus lyropictus

Moved

Moved from Maple aphids.

Thanks for the explanation Bob!

… Natalie Hernandez, 1 February, 2021 - 2:26pm

Moved

Moved from Aphids.

… Natalie Hernandez, 14 August, 2012 - 3:34pm

Yes, Periphyllus

According to Blackman and Eastop the only two species found on Acer glabrum are P. americanus and P. brevispinosus. The way to differentiate the two are by the longest hairs on the antennae and how much longer they are than the basal diameter of antennal segment III. Riiiight :)

… Natalie Hernandez, 14 August, 2012 - 3:26pm

Identification of aphid on Acer glabrum

All characteristics of this aphid (melanization pattern, hair lengths etc) point strongly to Periphyllus lyropictus.

In Britain it goes on several species of Acer, so it would not surprise me if it occurred on Acer glabrum.

… Bob Dransfield, 30 January, 2021 - 10:42am

Doesn't match up with reference information.

Aphid's on the World's Plants by Blackman and Eastop says accounts of P. lyriopictus on maple species other than A. plantanoides are likely misidentified. The link you included to Influential Points also does not mention them being found on any species of maple other than A. plantanoides.

http://www.aphidsonworldsplants.info/d_APHIDS_P.htm#Periphyllus

http://www.aphidsonworldsplants.info/C_HOSTS_Aar_Act.htm#Acer

Not saying it isn't possible, just not what is likely according to the literature.

I'm guessing you are the Bob Dransfield who is associated with Influential Points? Have you collected and slide mounted P. lyriopictus from A. glabrum?

… Natalie Hernandez, 30 January, 2021 - 2:11pm

ID matches with reference information

Regarding hosts of Periphyllus lyropictus:

1) Blackman does indeed note that records from other Acer are mostly due to confusion with other species. But in the host list you refer to he gives 6 Acer spp. it has been found on (Acer circinatum, Acer macrophyllum, Acer platanoides, Acer rubrum, Acer saccharinum, Acer saccharum). The dubious records he refers to (e.g. Acer negundo) have square brackets round them in the listings.

2) At the beginning of Blackman's section on Acer (see your ref above) he includes Periphyllus lyropictus in his most 'polyphagous' Periphyllus species (more precisely 'oligophagous', meaning feeding on a few hosts).

3) Blackman's lists of species by host are descriptive, not definitive, they are updated as more records are published - which is why the most studied hosts tend to have more species than closely-related taxa.

We obtained species descriptions from Blackman & Eastop, Palmer (1952), and Essig and Abernathy (1952).

We identified this image as P. lyropictus because the vivipara is yellowish-brown with characteristic dark brown markings in a V shape on dorsum of abdomen & down the middorsum of head and thorax.

It does not fit Periphyllus americanus, which is pale yellowish green with a dark median stripe on abdomen forming a cross in region of cornicles.

It also does not fit P. brevispinosus which is brown with dark and light mottling with short hairs on antennae (long hairs on antenna are just visible in photo).

Bob, InfluentialPoints.com

… Bob Dransfield, 1 February, 2021 - 5:51am