Orthocephalus styx (Reuter)

Namyatova, Anna A. & Konstantinov, Fedor V., 2009, Revision of the genus Orthocephalus Fieber, 1858 (Hemiptera: Heteroptera: Miridae: Orthotylinae) 2316, Zootaxa 2316, pp. 1-118: 88-89

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Orthocephalus styx (Reuter)


Orthocephalus styx (Reuter)  

Figures 4, 9, 13, 17, 19

Orthocephalus styx Reuter, 1908: 497–498   .

DIAGNOSIS: Recognized by the bristlelike setae on head and pronotum longer than diameter of eye, uniformly dark brown to black body (fig. 4), protruding eyes, aedeagus with single long spicule (fig. 9), bursa copulatrix with almost oval sclerotized rings and without medial sclerites (fig. 17). Most easily confused in appearance and the structure of male genitalia with O. proserpinae   , but that species differs in having setae on head and pronotum shorter than diameter of eye. Also similar to O. melas   , but in that species eyes are not protruding, aedeagus devoid of spicules (fig. 8), and the dorsal labiate plate has a pigmented area between sclerotized rings (fig. 15).

REDESCRIPTION: Male: Macropterous; length 5.3–6.2. COLORATION (fig. 4): Body uniformly dark brown to black, membrane uniformly pale brown. SURFACE AND VESTITURE: Dorsum smooth or slightly rugose. Bristlelike setae densely distributed on antennal segments II-IV, entire dorsum, and apical abdominal segments, longer than diameter of eye, somewhat shorter at apex of hemelytra; all femora, especially fore and middle ones, with two series of bristlelike setae along inferior margin and several subapical spine-like setae; brown short simple setae scarcely distributed on antennal segments, legs, sides of hemelytra, thoracic and abdominal venter; antennal segment I with 2 mesial spines. STRUCTURE AND MEASUREMENTS: Body 3.3–3.7× as long as width of pronotum. Head: Relatively wide, 1.3× as wide as high, frons convex, mandibular plates short and narrow; eyes small and protruding; vertex 2.2–2.5× as wide as eye; eye located at a short distance from anterior pronotal margin; depression along posterior margin of head distinct, antennal fossa located at a distance from inferior margin of eye; antennal segment I somewhat longer than diameter of eye, segment II thin, almost not incrassate, cylindrical, 0.9–1.1× as long as basal width of pronotum, 1.2–1.5× as long as width of head; labium reaching middle coxa. Thorax: Pronotum 1.9–3.0× as wide as long and 1.2– 1.5× as wide as head with posterior margin straight or slightly concave and lateral margin not carinate; calli distinctly raised; hind femora relatively narrow, approximately 1.5× as wide as middle femora. GENITALIA: Aedeagus with single spicule, comparatively thick and long, longer than dorsal wall of theca, twisted, with 1.5 convolutions along entire length (fig. 9); parameres as in fig. 13.

Female: Brachypterous, length 4.4–4.9. COLORATION: As in male. SURFACE AND VESTITURE: Similar to male, but anterior part of hemelytra with flattened silver setae (as in figs. 22 A-C, E, 23 A, D). STRUCTURE AND MEASUREMENTS: Body 2.7–3.2× as long as width of pronotum. Head: 1.2–1.3× wider than high, vertex 3.2–4.0× as wide as eye, vertex somewhat shorter than anterior margin of pronotum; antennal segment II 0.8–1.0× as long as basal width of pronotum, 0.8–1.0× as long as width of head. Thorax: Pronotum 1.9–2.3× as wide as long and 1.0–1.1× as wide as head; length of hemelytra ranging from reaching abdominal tergum VII to reaching middle of abdominal tergum IX, clavus and cuneus not delimited, claval commissure somewhat shorter or as long as inner claval margin, posterior and lateral margins rounded. GEN- ITALIA: Dorsal labiate plate without medial sclerites, sclerotized rings oval (fig. 17); posterior wall of bursa copulatrix with trapeziform sclerite uniformly sclerotized, incision on the anterior margin broad and not reaching middle of sclerite, anterior angles of this sclerite not dentate, posterior margin without sclerites (fig. 19); vulva with straight sclerites not forming a circle (fig. 19).

DISTRIBUTION: Known only from Turkmenistan.

HOST: Unknown.

SPECIMENS EXAMINED: Paralectotypes of Orthocephalus styx   : TURKMENISTAN: Ashgabat [Askhabad], 37.95 ° N 58.36666 ° E, Ahnger , 1♀ ( AMNH _ PBI 00252948) ( HNHM). 1♂ ( AMNH _ PBI 00150280) ( MZH) GoogleMaps   .

ADDITIONAL MATERIAL: TURKMENISTAN: Aydere Canyon 40 km from Garrygala [Kara-Kala], 38.4 ° N 56.73333 ° E, 17 May 1964, Loginova, 2♂ ( AMNH _ PBI 00225939, AMNH_PBI 00241264), 3♀ ( AMNH _ PBI 00236849, AMNH_PBI 00237600, AMNH_PBI 00259177) ( ZISP) GoogleMaps   . Chandyr River Tributary of Sumbara River , 38.25 ° N 55.67 ° E, 28 Apr 1933, Ushinskiy, 1♀ ( AMNH _ PBI 00237607) ( ZISP) GoogleMaps   . Gaudan , 38.68333 ° N 58.38333 ° E, 15 May 1905, Anger, 3♂ ( AMNH _ PBI 00155631, AMNH_PBI 00251780, AMNH_PBI 00259500), 4♀ ( AMNH _ PBI 00159648, AMNH_PBI 00259227-AMNH_PBI 00259229) ( ZISP) GoogleMaps   .


American Museum of Natural History


Hungarian Natural History Museum (Termeszettudomanyi Muzeum)


Finnish Museum of Natural History


Zoological Institute, Russian Academy of Sciences














Orthocephalus styx (Reuter)

Namyatova, Anna A. & Konstantinov, Fedor V. 2009

Orthocephalus styx

Reuter, O. M. 1908: 498