Sulawesimetopus henryi, Herczek, Aleksander, Gorczyca, Jacek & Taszakowski, Artur, 2018

Herczek, Aleksander, Gorczyca, Jacek & Taszakowski, Artur, 2018, Sulawesimetopushenryi, a new genus and species of Isometopinae (Hemiptera, Heteroptera, Miridae) from Sulawesi, ZooKeys 796, pp. 147-161 : 151-153

Sulawesimetopus henryi sp. n.

Diagnosis.

Same as genus.

Etymology.

Named in honor of the well-known American hemipterologist Dr. Thomas J. Henry, who has made a great contribution to the study of Miridae .

Description.

Male. Coloration (Fig. 1 A–C): body mostly shiny, dark brown. Head: dark brown, 1.34 in male and 1.47 in female, as high as wide and respectively 0.51 and 0.47 of pronotal width; eyes brownish red, the area around ocelli reddish. Antennae thin (particularly segments III and IV), I and II yellowish, III brown, IV yellow brown (Fig. 2B). Labium shiny, first three segments brown, IV with a dark ring in distal part (Fig. 1C). Thorax: pronotum chocolate brown, lateral edges clear, transparent and slightly raised. Mesoscutum very narrow, blackish brown, scutellum chocolate brown, excavated mesally, 0.80 as long as wide. Propleuron, mesopleuron and metapleuron dark brown. Claval commissure distinct, 0.46 as long as length of scutellum. Abdomen: bicolored: four segments before genital one lighter, yellowish tinged with pink, others dark brown. Ostiolar peritreme ivory, evaporative area brown (Figs 1C, 8, 9). Hemelytron: in various shades of brown, a bit lighter than pronotum and scutellum. Median part of embolium with elongate white spot. Lateral and apical part of cuneus and part of medial fracture adjacent to cuneus yellowish brown. Cuneus as long as wide, yellowish brown, central part dark brown. Membrane pale grey, semitransparent, with two yellowish-brown cells (the small one barely visible). Legs: coxae pale, almost white, femora and basal ½ tibiae chestnut-brown. Distal part of tibiae and tarsi almost white. Metacoxae flattened and thickened (Fig. 4D).

Female. Larger, head and pronotum similar to male in coloration, structure and texture. Mesoscutum covered by pronotum, invisible. Corium yellowish brown, median part of exocorium and part of corium adjacent to cuneus and most of cuneus white (Fig. 1A). Distal part of embolium near cuneal fracture red tinged. Membrane with creamy veins. Second tarsal segments incompletely divided.

Measurements. Holotype, male (number of measured specimens and range of variation in parentheses): body length: 3.10 (n = 6: 3.05-3.25), width: 1.47 (n = 6: 1.37-1.52); head length: 0.27 (n = 8: 0.27-0.30), width: 0.71 (n = 8: 0.68-0.74), height: 0.95 (n = 8: 0.92-1.03); dorsal width of eye: 0.30 (n = 8: 0.28-0.32); vertex width: 0.19 (n = 8: 0.19-0.21); antennal segments: I– 0.13 (n = 8: 0.11-0.13), II– 0.71 (n = 7: 0.65-0.72), III– 0.78 (n = 8: 0.8-0.78), IV– 0.13 (n = 7: 0.19-0.13); rostral segments: I– 0.35 (n = 3: 0.38-0.35), II– 0.45 (n = 3: 0.45-0.50), III– 0.33 (n = 2: 0.33-0.38), IV– 0.39 (n = 2: 0.39-0.50); pronotum length: 0.57 (n = 8: 0.57-0.62), anterior width: 0.74 (n = 8: 0.68-0.77), posterior width: 1.37 (n = 8: 1.32-1.46); mesoscutum length: 0.03 (n = 8: 0.02-0.04); scutellum length: 0.69 (n = 8: 0.61-0.72), width:0.81 (n = 8: 0.79-0.83); claval commissure length: 0.37 (n = 7: 0.28-0.37); hind leg: femur length: 1.05 (n = 2: 1.05-1.17), width: 0.30; tibia length: 1.40 (n = 3: 1.30-1.45), tarsus: 0.30 (n = 3: 0.25-0.30) I-0.11, II-0.25 (supposedly two segments 0.11+0.13); cuneus length: 0.36 (n = 8: 0.34-0.37), width: 0.35 (n = 8: 0.34-0.36).

Female (one specimen): body length: 3.25, width: 1.55; head length: 0.25, width: 0.70, height: 1.03; dorsal width of eye: 0.29; vertex width: 0.20; antennal segments: I– 0.12, II– 0.65, III– 0.87, IV– 0.18; rostral segments: invisible; pronotum length: 0.67, anterior width: 0.88, posterior width: 1.50; scutellum length: 0.65; claval commissure length: 0.38; hind leg: femur length: 1.13, width: 0.35; tibia length: 1.45, tarsus: 0.35 ( I– 0.07, II+ III– 0.30); cuneus length: 0.36; width: 0.36

Material examined. Holotype: male. Indonesia, Sulawesi Utara, P.P.R. bungalow (P.M.), 8/18 XI 1985, Station: 099, Project Wallace, leg: R. Bosmans & J. Van Stalle.

Female: Sulawesi Utara, Dumoga-Bone Nat.Park, Hogg’sBack subcamp (660m), 15-XI-1985. Station: 095. Project Wallace, leg: R. Bosmans & J. Van Stalle. L.G. no 26.977.

Paratypes:: 2 ♂♂. Indonesia, Sulawesi Utara, P.P.R. bungalow (P.M.), 8/18 XI 1985, Station: 099, Project Wallace, leg: R. Bosmans & J. Van Stalle; 5♂♂ Sulawesi Utara, Dumoga-Bone Nat.Park, Hogg’sBack subcamp (660m), 15-XI-1985. Station: 095. Project Wallace, leg: R. Bosmans & J. Van Stalle. L.G. no 26.977. The holotype and paratypes are deposited in the R.I.Sc.N.B.

Remarks. The new species can be distinguished from all others belonging to Gigantometopus , Astroscopometopus and Isometopidea by its body structure, combination of color, and metric features. The newly described species is the smallest of those in the three genera (Table 1). The following metric features distinguish Sulawesimetopus henryi sp.n.: head width to vertex width ratio 3.55 (vs. Gigantometopus schuhi 2.05, Astroscopometopus gryllocephalus 3.11, A. formosanus 3.25 and Isometopidea yangi 7.0), head width to pronotum width 0.51 (and respectively 0.28, 0.45, 0.46 and 0.54), antennal segments II:I length ratio 5.96 (and respectively 6.5, 7.67, 6.50 and 7.5), pronotum width to head width 1.94 (and respectively 3.51, 2.24, 2.15 and 1.85). In the new species the claval commissure is shorter than in others. Additionally S. henryi sp.n. differs from A. gryllocephalus by position of the scutellar depression, antennal hairs (Fig. 3A, B) and the lack of a subapical claw tooth. Certain color features also differ: S. henryi sp.n. is darker than the others, the apical part of the rostrum is dark brown, the hemelytra are almost monochromatic (dark brown), and only the middle part of the embolium is white. The hemelytra in G. schuhi are largely dark golden to reddish brown, in contrast to the hemelytra light brown with a creamy spot in the middle in G. gryllocephalus , grey with a dark brown clavus and a circular creamy spot mesially in A. formosanus and the yellowish brown semitransparent hemelytra in Isometopidea yangi . The color pattern of the legs also is species–specific.

The construction of the aedeagus and parameres is similar to other compared species. The differences are relatively small (as with most other species of Isometopinae and Psallopinae) and refer to the extent of sclerotization of the aedeagus and the shape of the sensory lobe of the left paramere.

The female of S. henryi sp. n. is indistinguishable from a female of A. gryllocephalus by the length of antennal segments, posterior width of the pronotum, and the shorter hind femur, tibia and tarsus. The proportions of body length to width, head width to vertex width, and corium length to cuneus length also differ (respectively: 2.09 and 2.72, 3.50 and 3.88, 6.94 and 4.11). Clear differences occur in coloration. The distal part of the embolium near the cuneal fracture in S. henryi sp. n. is tinged with red, the median part of exocorium adjacent to the cuneus is yellowish brown and the cuneus is mostly white, whereas in A. gryllocephalus the embolium is pale brown and semitransparent, the corium is yellowish with a white spot in the middle, and the inner half of the cuneus is yellowish white.