Post by Sebbe on Oct 15, 2024 11:13:40 GMT
This subspecies was first defined in Tutt (1909a) as shown here (type locality: Dover, Kent, England).
This reference merely names the subspecies, but defers the description to Tutt (1909b), which itself refers back to Tutt (1909a) and also mentions Barrett (1893), Jones (1905a) and Jones (1905b). This subspecies is extinct and was formerly found on chalk downland in Kent, Surrey, Hampshire and Dorset. It differs from the subspecies argus as follows:
1. It is slightly larger in size, on average.
2. The male upperside is of a brighter blue.
3. The male upperside has narrower dark borders.
4. The male upperside hindwing has distinct marginal spots, rather than a dark band.
The colony found in the quarries of Portland Bill exhibits characteristics that are similar to this subspecies.
This reference merely names the subspecies, but defers the description to Tutt (1909b), which itself refers back to Tutt (1909a) and also mentions Barrett (1893), Jones (1905a) and Jones (1905b). This subspecies is extinct and was formerly found on chalk downland in Kent, Surrey, Hampshire and Dorset. It differs from the subspecies argus as follows:
1. It is slightly larger in size, on average.
2. The male upperside is of a brighter blue.
3. The male upperside has narrower dark borders.
4. The male upperside hindwing has distinct marginal spots, rather than a dark band.
The colony found in the quarries of Portland Bill exhibits characteristics that are similar to this subspecies.
www.ukbutterflies.co.uk/species.php?species=argus
collector-secret.proboards.com/thread/721/extinct-english-plebejus-argus-cretaceus
archive.insectnet.com/thread/4182/extinct-british-plebejus-masseyi-cretaceus