Mesocallis ( Mesocallis ) carpinicola Lee Y., sp., 2018

Mesocallis ( Mesocallis) carpinicola Lee Y., sp. View in CoL

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( Figs. 1 View Fig , 2 View Fig , 3 View Fig a-b, 5, 10; Table 1)

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Material examined: Holotype: 1 alate viviparous female, Jangsan-forest , Jangsan-ri, Maam-myeon, Goseong-gun, GN, South Korea, 35°02'48"N, 128°24'44"E, on Carpinus laxiflora, Yerim Lee and Hyoseok Lee leg., 3.v.2015, no. 150503YR-11. GoogleMaps

Paratypes: 19 alate viviparous females, same data as the holotype, including DNA voucher no. Mes1-2, Mes1-3, Mes1-4, Mes1-5.

Etymology: The species name, carpinicola , is derived from the genus name of the host plant ( Carpinus ) and the Latin suffix ‘-cola’ (dweller, inhabitant).

Diagnosis: This species is close to M. ( M.) pteleae in having similar coloration and Cu1b of forewing dark bordered. However, the new species can be distinguished from M. ( M.) pteleae by its shorter PT, 0.06-0.08 mm ( 0.08-0.10 mm in M. pteleae ) and shorter URS length, 0.10-0.11 mm ( 0.11-0.14 mm in M. pteleae ), ANT III with 4-5 setae ( 5-9 in M. pteleae ), URS with 4-6 accessory setae ( 8-9 in M. pteleae ), cauda with 10-15 setae ( 7-11 in M. pteleae ).

Description ( Alate viviparous female): Color in life: Head pale yellow, head vertex and ANT I-III fuscous, distal 1/3 of ANT IV and ANT V darken, BASE and distal 1/2 of PT also darken. Thorax and abdomen pale yellow. Legs pale, fore and hind tibiae including 1/9 of femur and tarsus black, 1/9 of middle tibiae and tarsi dark. Wing vein Cu1b of forewing bordered with black pigment. SIPH pale. Cauda and anal plate pale.

Morphology: Body oval, BL, 1.30-1.55 mm. Head smooth with a flat median protrusion on frons, head vertex with 0.01 mm pointed setae, epicranial suture weakly developed, head dorsum without tubercles. ANT 6-segmented, 0.92-1.05 mm long, ANT 0.66-0.78 × BL, ANT III longest with 12- 16 narrow transversely elliptical secondary rhinaria in a row on the whole segment, with 4-5 short and pointed setae, ANT III-VI imbricated with very short and inconspicuous setae, Ls ANT III × 0.50 BD III, ANT IV without secondary rhinaria, ANT V shorter than ANT IV, PT 0.60-0.80 × BASE. Rostrum not reaching to middle coxae, URS 0.10-0.11 mm long with 4-6 accessory setae, URS 1.00-1.22 × BASE, 1.22-1.38 × HT II. Thorax smooth, without tubercles. Fore coxae weakly enlarged, longest setae on TIBIAE III 0.67-1.00 × middle width of TIBIAE III, HT I with 7 chaetotaxy, HT II 0.08- 0.09 mm long. Wing vein Rs of forewing weakly developed. Dorsal spinal setae sometimes on small elevations, conspicuous tubercles not developed, ABD VIII with a pair of spinal setae, ABD margin I-IV with a single seta on short cone-shaped marginal tubercles, 4th marginal tubercle 0.03 mm. SIPH cylindrical, truncated, 0.05-0.06 mm long. Cauda knobbed, 0.07-0.09 mm long, bearing 10-15 setae. Anal plate bilobed, each lobe with 6-8 setae.

Distribution: So far, the species is known from Goseong-gun in the southern part of South Korea.

Host plant: The species feed on the underside of leaves of Carpinus laxiflora ( Betulaceae ).

Remarks: This species was first referred to as Mesocallis sp. in Lee et al. (2017).