Phaedon concinnus Stephens, 1831
Taxonomy: Polyphaga > Chrysomeloidea > Chrysomelidae > Phaedon > Phaedon concinnus
Description
Size: 3.2-4.1mm
Basic colour: Bright metallic green or greenish blue, sometimes coppery, rarely metallic blue.
Pattern colour: None
Number of spots: None
Other colour forms: Sometimes
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Phaedon cochleariae
Basic colour: Bright metallic green or greenish blue, sometimes coppery, rarely metallic blue.
Pattern colour: None
Number of spots: None
Other colour forms: Sometimes
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Phaedon cochleariae
Biology
Status: Scarce (Notable B)
Habitat: Various coastal habitats.
Host plant: Sea Plantain (Plantago maritima) and Sea Arrowgrass (Triglochin maritimum).
Overwintering: Adults overwinter though location unknown.
Food: Leaves of host plants.
Other notes: The rare metallic blue form can be confused with P. cochleariae. However, in P. concinnus, the antennae are entirely black; in P. cochleariae, the underside of the 2nd & 3rd antennal segments are reddish (or at least with a reddish spot).
Habitat: Various coastal habitats.
Host plant: Sea Plantain (Plantago maritima) and Sea Arrowgrass (Triglochin maritimum).
Overwintering: Adults overwinter though location unknown.
Food: Leaves of host plants.
Other notes: The rare metallic blue form can be confused with P. cochleariae. However, in P. concinnus, the antennae are entirely black; in P. cochleariae, the underside of the 2nd & 3rd antennal segments are reddish (or at least with a reddish spot).
Articles
Anderson, R. (2012). Phaedon concinnus Stephens (Chrysomelidae) in Ireland. The Coleopterist 21(3): 125.
Foster, A.P. (2011). Phaedon concinnus Stephens (Chrysomelidae) in Northumberland. The Coleopterist 20(2): 76.