Hyoidea horvathi Montandon, 1890

Knyshov, Alexander & Konstantinov, Fedor V., 2013, A taxonomic revision of the genus Hyoidea (Hemiptera: Heteroptera: Miridae), Acta Entomologica Musei Nationalis Pragae 53 (1), pp. 1-32 : 15-19

Hyoidea horvathi Montandon, 1890

( Figs 4–5 , 19, 43, 50)

Hyoidea horvathi Montandon, 1890: 178 (original description)

Hyoidea horvathi: CARVALHO (1958: 76) (catalogue); HOBERLANDT (1963: 270) (redescription); WAGNER (1974: 142) (redescription); SCHUH (1995: 123) (catalogue); KERZHNER & JOSIFOV (1999: 249) (catalogue)

Type locality. Algeria, Oran.

Type material examined. SYNTYPE: ♀, ALGERIA: ORAN: Oran, 35.69111°N 0.64167°W, 111 m, L. Moisson (AMNH_PBI 00340429) ( BMNH).

Additional material examined. ALGERIA: ORAN: Oran, 35.69111°N 0.64167°W, 111 m, L. Moisson, 1 J (AMNH_PBI 00340440), 1♀ (AMNH_PBI 00340430) ( BMNH) ; Oran, 1887 – 1888, coll. A. Puton, 1♀ (AMNH_PBI 00340283) ( ZMUH) ; Oran, 1893, P. Mathieu, 1 ♀ (AMNH_PBI 00340432) ( BMNH) . TUNISIA: Tunis, 36.8°N 10.18°E, no date provided, Vauloger, 1 ♀ (AMNH_PBI 00340431) ( BMNH) .

Redescription. Male: Middle-sized, 4.5 mm. COLOURATION ( Fig. 4 ): Dirty yellowish. Head: Clypeus dirty yellow, with small black longitudinal spot at base and two black lateral stripes extending from base to middle of clypeus; mandibular plate entirely pale brown, maxillary plate dirty yellow with black apex; frons with black, not confluent stripes radiating from midline and two small black spots near eyes; vertex with two large, black, not confluent spots; antenna entirely dark brown or segment II apically black; labium dark brown, apex of segment IV black. Thorax: Pronotal collar and anterior part of pronotum dirty yellow; calli almost entirely covered with dense and largely confluent black spots; disc pale brown, some specimens with sparse minute dark spots; mesonotum brown, scutellum brown with more or less expressed pale brown middle stripe; thoracic pleurites pale, with darkened propleural suture. Hemelytron: corium with sparse minute dark spots; claval fracture, claval commissure and medial fracture somewhat darkened; cuneus with slightly darkened apex. Legs: Pale brown with reddish tinge, dorsal and ventral surfaces of all femora with a series of minute, partly confluent dark brown spots running along posterior margin at base and apically extending to anterior margin. Abdomen: Pale brown. SURFACE AND VESTITURE: Smooth, disc at base with sparse, very fine, and darkened punctures, base of disc and scutellum typically with transverse wrinkles; vestiture composed of intermixed simple setae and long and moderately flattened silvery scalelike setae; simple setae pale on head and anterior part of pronotum, black on disc and hemelytron. STRUCTURE: Head: Vertex 2.4–2.5 × as wide as eye; antennal segment I 0.4 × as long as width of head; antennal segment II 1.4–1.5 × as long as width of head and 1.2 × as long as width of pronotum. Thorax: Pronotum 1.6–1.7 × as wide as long and 1.1–1.2 × as wide as head. GENITALIA: Genital capsule with large tooth on left side of genital opening; sensory lobe of left paramere short, flattened and serrate, caudal process relatively thick, bearing denticles and forming acute angle with apical process ( Fig. 43 ); left spicule of aedeagus 0.5 × as long as right one, with small denticles at side; both branches of right spicule long and narrowing apically, with apical serration ( Fig. 50 ).

Female: Middle-sized, 4.2–4.9 mm. COLOURATION ( Fig. 5 ), SURFACE AND VESTI- TURE: As in male. STRUCTURE: Larger than male, with larger interocular distance, vertex 2.9–3.2 × as wide as eye; antennal segment I 0.3–0.4 × as long as width of head; antennal segment II 1.2 × as long as width of head and 1.0–1.1 × as long as width of pronotum; pronotum somewhat wider than in male, 1.7–1.8 × as wide as long and 1.1–1.2 × as wide as head; abdomen larger than in male and partly extending beyond apex of membrane; membrane reaching base of tergite IX.

Differential diagnosis. Distinguished by the following combination of characters: dark minute spots indistinct, expressed only on basal part of disc and corium; two black spots on vertex not confluent; simple setae pale on head and anterior part of pronotum and black on disc and hemelytron; scales absent and replaced with moderately flattened silvery scale-like setae; genital capsule with large tooth on left side of genital opening; sensory lobe of left paramere short, flattened and serrate, caudal process relatively thick, bearing denticles and forming acute angle with apical process ( Fig. 43 ); left spicule of aedeagus 0.5 × as long as right one, with small denticles at side ( Fig. 50 ); both branches of right spicule long and narrowing apically, with apical serration ( Fig. 50 ).

The species is easily distinguished from all Hyoidea representatives except H. lindbergi . Both H. horvathi and H. lindbergi are known from northwestern Africa and are similar in habitus and colouration. However, these species differ in the shape of the pronotum, which is abruptly widened at the level of the calli, with concave lateral margins in H. horvathi , and relatively narrow apically, with straight lateral margins in H. lindbergi . This character can be described as a ratio between the width of pronotum at base and at the level of the calli. According to our observations, this ratio is <1.4 in male and <1.3 in female of H. horvathi , while in H. lindbergi the ratio is> 1.5 in male and> 1.4 in female. Dark minute spots in H. horvathi are almost absent or scarce, only the pronotal disc and corium are noticeably covered with spots, while the anterior part of the pronotum and vertex are never punctured. The dorsum of H. lindbergi is usually heavily covered with minute dark spots, rarely with scarce spots, but the vertex and anterior part of pronotum always have spots. Vestiture on the dorsum is always composed of dark simple setae and oval scales, while in H. horvathi simple setae are pale on the head and anterior part of pronotum and dark elsewhere, intermixed with moderately flattened, long and slender silvery setae. In addition, males differ in the structure of aedeagus (compare Figs 50 and 55).

Host associations. Unknown.

Distribution. Northwestern Africa (Fig. 19); known from Oran in Algeria ( MONTANDON 1890) and Tunis in Tunisia (new record).

Discussion. The species was described by Montandon from several specimens from Oran, collected by Moisson ( MONTANDON 1890). The type series is now dispersed over several European museums ( KERZHNER & JOSIFOV 1999), and we had an opportunity to examine only one syntype, female, deposited in BMNH. We also examined several male and female specimens with the same locality labels, but they were probably not studied by Montandon.

Figures

Figs 1–9. Dorsal habitus of Hyoidea species. 1 – Hyoidea hannothiauxi Carapezza, 1997, male. 2–3 – Hyoidea hermione Linnavuori, 1989: 2 – male; 3 – female. 4–5 – Hyoidea horvathi Montandon, 1890: 4 – male; 5 – female. 6–7 – Hyoidea kerzhneri Hoberlandt, 1963: 6 – male; 7 – female. 8–9 – Hyoidea lindbergi Hoberlandt, 1963: 8 – male; 9 – female.

Figs 40–44. Left paramere. 40 – Hyoidea hannothiauxi Carapezza, 1997; 41 – H. lopezcoloni Baena & Günther, 2001; 42 – H. hermione Linnavuori, 1989; 43 – H. horvathi Montandon, 1890; 44 – H. stehliki Baena & Günther, 2001. Lettering: a.p. – apical process, s.l. – sensory lobe, c.p. – caudal process, den. – denticles.

Figs 49–52. Aedeagus in ventral view, lateral view and in transverse section at base (phallotheca and phallobase removed). 49 – Hyoidea hannothiauxi Carapezza, 1997; 50 – H. horvathi Montandon, 1890; 51 – H. lopezcoloni Baena & Günther, 2001; 52 – H. notaticeps Reuter, 1876. Lettering: l.sp. – left spicule, r.sp. – right spicule.