Isometopus (Isometopus) anlasi, Çerçi & Dursun, 2017

Çerçi, Bariş & Dursun, Ahmet, 2017, Isometopus anlasi sp. nov. (Heteroptera: Miridae) from Turkey, Zootaxa 4353 (2) : -

Isometopus (Isometopus) anlasi sp. nov. ( Figures 1–10 )

Type material. Holotype: ♂, Turkey, Istanbul, Esenyurt , 0 5.08.2015, N 41°03'02.7", E 28°40'35.8", B. Çerçi leg . Paratypes: Turkey, Istanbul, Esenyurt , N 41°03'02.7", E 28°40'35.8", 0 9. 0 7. 2017, 1 ♂; 13. 0 7.2017, 3♀ ♀; 13.07. 2017, 1♂; 23.07.2017, 1♂; 30.07.2016, 1♂; B. Çerçi leg.

Description. Males: Size, 2.6–2.8 mm. Head yellowish brown with dense dark punctures in frons ( Figs. 1, 2 , 5, 7 ). In front view, 1.49 times as broad as high, in dorsal view 3.1–3.4 times as broad as long. Posterior margin with a narrow white stripe, apical margin carinate, two or three transverse pale callosities above the apical margin, with very few punctures on them; long and dark setae on the level of the pale callosities; frons densely punctured except on the slightly elevated and light colored almost glabrous areas between the eyes, covered with long and black pubescence, clypeus and mandibular plates with less dense and irregular black hairs. Maxillary and mandibular plates yellowish brown. Genae very low. Eyes dark red to brown, ocular index in dorsal view 0.88. Ocelli bright red, extremely hard to distinguish from the surrounding colored annuli, very protuberant, interocellar space small, 0.9–1.1 times as broad as the width of an ocellus ( Fig. 7 ). Antennae covered with dense stiff black setae, setae mostly seeming white under bright light. Setae a little shorter than the width of the second antennal segment, antennal ratio 9: 65: 35: 14, first antennal segment black with a white apical ring, second antennal segment thick, bent outwards, proximal three fourths light brown, distal fourth dark brown with very apex narrowly whitish, 0.86 times as long as width of head, third and fourth antennal segments dark brown, both proximally and distally whitish. Pronotum 1.73 times as wide as width of head; 2.64 times as broad as long, dark brown, laterally getting lighter in color, anterior margin broadly light brown in the middle, lateral margins narrowly whitish, posterior margin with a light brown stain in the middle, coarsely and densely punctured. Vestiture of pronotum with reclining, fine, long and black simple setae; as for antennae they seem shiny white under bright light. Mesoscutum coarsely and densely punctured, dark brown with a broad light brown or orange colored elliptic pattern on each side of posterior margin, setae as in pronotum. Scutellum dark brown, puncturing and vestiture as in pronotum, apex white, two big elliptic and orange spots on sides along lateral margins. Clavus dark brown, coarsely and densely punctured, proximally orange, distally very narrowly light orange, vestiture as in pronotum. Corium coarsely and sparsely punctured, vestiture as in pronotum, dark brown except for a central orange to milky white subtriangular spot and outer margin orange, proximally and distally darker, almost brown. Exocorium orange, broad, proximally with only one to four rows of punctures along the inner margin, vestiture as in pronotum. Cuneus orange, with a narrow dark brown stripe along inner margin, setae as in pronotum. Membrane fuscous, vein dark brown, uniareolate ( Fig. 5 ). Femora and tibiae pale, almost unicolorous. Rostrum reaching or extending slightly beyond hind coxae. Abdomen ventrally dark brown. Left paramere as in figs 9 and 10, right paramere similar to that of other species of the genus.

Females: Size, 2.5 mm. Head light brown with deep dark brown punctures, dense on vertex and sparser on frons, posterior margin with a white band, 1.35 times as broad as high, 3.32 times as broad as long, apical margin with three transverse pale callosities, separated by dark brown bands, vertex and frons with sparse and short black setae; modestly raised, light and glabrous areas between the eyes as in male, but less evident and more densely punctuated, genae very high, 0.51 times as high as the height of one eye, eyes dark red with very small and sparse erect setae, ocular index 0.9, ocelli red, small, interocellar space very broad, 2.7–3 times as broad as the width of an ocellus ( Fig. 8 ). Antennae with short, reclining black setae, seeming white under bright light, antennal ratio 15: 53: 32: 17, first antennal segment as in male, second antennal segment gracile, distally slightly swollen, 0.75 times as long as width of head, yellowish brown, proximally slightly darkened, apically dark brown and at the very apex white to yellow, last two segments as in male. Pronotum 1.85 times as broad as width of head, 2.8 times as broad as long, coarsely and densely punctuated, dark brown, laterally getting lighter, lateral margins narrowly whitish, posterior margin wave-like, a white spot in the middle of the pronotum sometimes joining the orange spots along the posterior margin of pronotum, vestiture consisting of reclining black setae. Mesoscutum and scutellum as in male. Clavus dark brown, darker than in male, coarsely and densely punctured, in some specimens proximally narrowly orange, vestiture as in pronotum. Corium dark brown, coarsely and densely punctured, in the middle with an orange elliptic spot, more or less apparent, posterior margin with two subtriangular orange spots, vestiture as in pronotum. Exocorium very broad, densely punctured throughout, dark brown except for outer margin broadly orange in proximal half, vestiture as in the pronotum. Cuneus milky white, outer margin broadly dark brown, sometimes the dark coloration outweighs the pale coloration. Membrane brown, vein broadly black ( Figs. 3 , 6 ). Femora and tibiae pale colored, very apex of tibiae narrowly darkened. Labium slender, reaching to the fourth abdominal sternite. Abdomen ventrally brown.

Last instar nymph: As in Fig. 4 .

Biology: The specimens of the new species were collected from walnut and wild apple trees. They mostly hide among crevices of the main trunk. It is extremely hard to notice them while they are not moving. Females wander among the crevices with their rostrum thrust forward, searching for preys. Though females are able to fly, they prefer not to fly when they feel under threat but run away very fast and hide deep inside the crevices. On the contrary, males are active fliers. They do not wander much but fly from one place to the other on the tree. The specimens were collected between early July and early August.

Differential diagnosis: The new species is placed in the nominotypical subgenus Isometopus . The new species is similar to I. longirostris Josifov 1993 in coloration pattern of hemelytra but it is distinguished from it by much shorter labium and presence of pale lateral spots on scutellum. In males of the new species labium reaches or extends slightly beyond hind coxae, in I. longirostris reaches to ninth sternite ( Josifov 1993). The coloration pattern of the scutellum (two lateral orange spots and distal tip white) is unique among the Isometopus species of Europe and Middle East and readily a good character to distinguish this new species from all other species of the genus Isometopus living in this area. The new species can be distinguished from other species of Europe and Middle East by the following updated key.

Etymology. The new species is dedicated to Assoc. Prof. Dr. Sinan Anlaş (Celal Bayar University, Manisa) who is a specialist working on the Staphylinidae fauna of Turkey. The first author is very grateful to him for his encouragement and help in writing scientific publications.

Figures

FIGURES1–4.Habitus photographs ofIsometopus anlasi sp.nov., Figs.1,2—(Dorsal view), ♂ onJuglansregia L.;Fig.3—(Dorsal view), ♀ on Juglans regia L.; Fig.4—Last instar nymph, on Juglansregia L.

FIGURES5–10. Isometopusanlasi sp.nov.,Fig.5—♂ (Dorsal view); Fig.6—♀ (Dorsal view); Fig.7—♂, head infrontal view;Fig. 8—♀, head infrontal view; Figs 9, 10—Left paramere indorsal and ventralview.