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Andryala daisy aphidOn this page: Identification & Distribution Other aphids on the same host
Identification & Distribution
Adult apterae of Uroleucon mierae (see largest individuals in first picture below) are dark, shiny, reddish brown with black antennae and siphunculi, and a pale cauda, similar in appearance to Uroleucon picridis. The femora are pale basally and brown-black distally; the tibiae are light brown basally and brown-black distally. The antennal tubercles are well developed, their inner faces parallel or divergent in dorsal view. The antennae are 0.88-1.43 times the body length, with a terminal process that is about 5.2 times the base of antennal segment VI. The apical rostral segment (RIV+V) is 1.19-1.58 times the second hind tarsal segment (HTII) (cf. Uroleucon picridis, which has RIV+V 1.51-1.84 times HTII). There are no marginal tubercles on abdominal tergites I or VII. Dorsal hairs all arise from dark scleroites, and pre- & post-siphuncular sclerites are present. The siphunculi are 1.43 (1.18-1.68) times the cauda. Body length of adult Uroleucon mierae apterae is 2.5-3.8 mm.
Note: Tizado & Nieto Nafria (1994) found that the best way to separate Uroleucon mierae from Uroleucon picridis is to first base it on the absolute length of the apical rostral segment: it's mean length is 269 +/- 6 μm for Uroleucon picridis (range: 241-318 μm), and 226 +/- 3 μm for Uroleucon mierae (range: 195-250 μm). This indicates that there is an overlap in the length of apical rostral segment between 235-256 μm., which means the discriminant function (D) below should be used to separate them in this range. Uroleucon mierae have a value of D less than 64.81.
First image above copyright Faluke, second image copyright Savvas Zafeiriou;
No description of the alate vivipara appears to have been published, but it seems likely that it is much like the aptera. In the case of the closely related Uroleucon picridis, the only differences are that the marginal and antesiphuncular sclerites are larger, and antennal segment III has 19-23 secondary rhinaria.
Image above copyright Luis Azoia under a Creative Commons License.
Uroleucon mierae is monoecious on Andryala spp. (see picture above of Andryala integrifolia), and has also been recorded on Hispidella hispanica and Rhagadiolus stellatus. The species is holocyclic with dark green alate males. Uroleucon mierae has so far been recorded in Spain, Algeria, France, Corsica, Sicily and Croatia.
Other aphids on the same host
Uroleucon mierae has been recorded on 3 Andryala species (Andryala integrifolia, Andryala pinnatifida, Andryala ragusina).
Blackman & Eastop list 10 species of aphid as feeding on Common andryala (Andryala integrifolia) worldwide, and provide formal identification keys (Show World list). Of those aphid species, Baker (2015) lists 8 as occurring in Britain (Show British list).
Uroleucon mierae has been recorded on 1 Hispidella species (Hispidella hispanica).
Blackman & Eastop list 2 species of aphid as feeding on Hispidella hispanica worldwide, and provide formal identification keys (Show World list). Of those aphid species, Baker (2015) lists 1 as occurring in Britain (Show British list).
Uroleucon mierae has been recorded on 1 Rhagadiolus species (Rhagadiolus stellatus)
Blackman & Eastop list 5 species of aphid as feeding on Endive daisy (Rhagadiolus stellatus) worldwide, and provide formal identification keys (Show World list). Of those aphid species, Baker (2015) lists 4 as occurring in Britain (Show British list).