Camarotoscena subrubescens (Flor)

Burckhardt, Daniel, Haseen, Cherukad, He, Zhixin, Luo, Xinyu, Pramatarova, Monika, Grimaud, Sylvain, Hussain, Barkat, Song, Fan & Serbina, Liliya Štarhová, 2025, Species concepts in the psyllid genus Camarotoscena (Hemiptera, Psylloidea) associated with Populus (Salicaceae), Alpine Entomology 9, pp. 153-172 : 153-172

Camarotoscena subrubescens (Flor)

Figs 1 C, H , 2 S – U , 4 J – L , 5 H , 6 D, H , 7 D , 8 C

Rhinocola subrubescens Flor (1861 b) : 411

Camarotoscena subrubescens, Vondráček (1951): 124

Camarotoscena ujenci Klimaszewski (1982): 3; syn. nov.

Material examined.

From Bulgaria, France, Turkey; dry and slide mounted; BFUS, MHNG, MMBC, NHMB.

Description.

Adult by Loginova (1975 b). Fifth instar immature (Fig. 6 D ). Dorsal sclerites on the head, thorax and abdomen brown to dark brown (Fig. 6 D ). Setae on the dorsal surface of the forewing pads relatively dense, numerous and long and with several sectasetae (Fig. 6 H ). Caudal plate with interval II longer than medial and apical row of setae (Fig. 7 D ). Ventrite bearing the circumanal ring strongly sclerotised and well-delimited anteriorly; bearing a row of setae along anterior margin; venter with four transverse rows between abdominal base and anterior margin of terminal ventrite; transverse row IV of setae on abdominal venter consisting of one uneven row of variously long setae (Fig. 8 C ).

Distribution.

Bulgaria, Croatia, France, Italy, Slovenia, Mongolia, Turkey ( Flor 1861 b; Oshanin 1907; Klimaszewski 1982; Burckhardt and Önuçar 1993; Conci et al. 1993; Seljak 2020; Pramatarova et al. 2025).

Host plant.

Populus alba L., P. nigra L. ( Salicaceae ), confirmed by the presence of immatures.

Biology.

Immatures in leaf roll galls (Fig. 1 H ). Probably bivoltine ( Conci et al. 1993). In the south of France, adults are common in August (S. Grimaud, pers. obs.). Flor (1861 b) mentioned that this species was found together with C. speciosa (“ gleichzeitig und an denselben Stellen … ”).

Comment.

According to Klimaszewski (1982), Camarotoscena ujenci , erected for two males, differs from C. subrubescens in the geographical distribution ( Mongolia versus Mediterranean), the opaque yellow forewings with more intense coloration along apical margin (versus uniformly yellow), the rust-yellow antennae with dark segment X (versus dark segments IX and X) and the host association Populus diversifolia (= P. euphratica ) versus P. robusta (= Populus × canadensis ). The characters provided by Klimaszewski (1982) are not very convincing to justify a new species. More material is required to solve this problem. Meanwhile, C. ujenci is considered a synonym of C. subrubescens .

Figures

Figure 1. Camarotoscena spp. A – D. Living adults on Populus; E – H. Galls on Populus nigra. A, B, G. C. speciosa; C, H. C. subrubescens; D. Camarotoscena sp. with colour pattern intermediate between C. speciosa and C. subrubescens; E, F. C. fulgidipennis and C. hoberlandti. Photos A, D by M. Pramatarova; B, C, G, H by S. Grimaud; E, F by C. Haseen.

Figure 2. Camarotoscena spp. A, D, G, J, M, P, S. Habitus, in lateral view (scale = 0.3 mm); B, E, H, K, N, Q, T. Forewing (scale = 0.3 mm); C, F, I, L, O, R, U. Surface spinules in cell r 2 above the bifurcation of vein M (scale = 0.05 mm). A – C. C. fulgidipennis; D – F. C. hoberlandti; G – I. C. trjapitzini, the forewing in H is anomalous in that it lacks cell m 1; J – L. C. lauta; M – O. C. personata; P – R. C. speciosa; S – U. C. subrubescens.

Figure 4. Camarotoscena spp. A, D, G, J. Male terminalia, in lateral view (scale = 0.1 mm); B, E, H, K. Paramere, inner face in lateral view (scale = 0.05 mm); C, F, I, L. Distal segment of aedeagus (scale = 0.05 mm). A – C. C. lauta; D – F. C. personata; G – I. C. speciosa; J – L. C. subrubescens.

Figure 5. Camarotoscena spp., female terminalia, in lateral view (scale = 0.1 mm). A. C. fulgidipennis; B. C. hoberlandti; C. C. trjapitzini; D. C. personata; E. C. badia (del. X. Luo); F. C. lauta; G. C. speciosa; H. C. subrubescens.

Figure 6. Camarotoscena spp., fifth instar immature. A – E. Dorsal view, left side (scale = 0.1 mm); F – H. Left forewing pad, dorsal view (scale = 0.1 mm); I. Detail of dorsal face of forewing pad with sectasetae (arrows) (scale = 0.05 mm). A, F. C. fulgidipennis; B. C. hoberlandti; C, G, I. C. speciosa; D, H. C. subrubescens; E. C. trjapitzini.

Figure 7. Camarotoscena spp., fifth instar immature. A – E. Caudal plate (scale = 0.1 mm); F. Apex of abdominal venter, anterior margin of sclerotised plate indicated by arrows (scale = 0.1 mm). A. C. fulgidipennis; B. C. hoberlandti; C, F. C. speciosa; D. C. subrubescens; E. C. trjapitzini. Abbreviations: brs, mrs and ars = basal, medial and apical row of setae.

Figure 8. Camarotoscena spp., fifth instar immature, abdominal venter with transverse rows of setae indicated by numbers (scale = 0.1 mm). A. C. fulgidipennis; B. C. speciosa; C. C. subrubescens.