Silhouettanus alboclavatus Emsley 1969

Hill, Lionel, 2014, Revision of Silhouettanus with description of nine new species (Hemiptera: Heteroptera: Schizopteridae), Zootaxa 3815 (3), pp. 353-385 : 360

Silhouettanus alboclavatus Emsley 1969

( Fig. 1 , dimensions in Table 1 )

Gen.? alboclavatus Distant, 1913: 171 . Unavailable name (ICZN Art. 11.9.3)

Silhouettanus alboclavatus Emsley, 1969: 88 . Newly proposed generic combination for “Gen.? alboclavatus ” Distant, 1913. Holotype (male): Seychelles, Silhouette Is., Mare aux Cochons (BMNH).

Type material examined. Paratype. ‘Near Mont Pot-á-eau/ 1500 ft. / Silhouette/ Seychelles Isl. / Percy Sladen Trust / expn 1908–09 // mounted in pva / from dried specimen / M. G. Emsley 1962/ Paratype / male’ in CUMZ.

Supplementary description. L4 relatively short, ratio of lengths of labial segments roughly 2.5:1.75:1:3.5. Fore wing 1.05mm long, with one pale band (clavus and adjoining corium pale), costal lobe wide; divergence of R+M from Sc basal; membrane not emarginate at apex of costal lobe; cell R <discal cell, divergence of M from R distal to basal cell, less than half area of cell R is distal to apex of discal cell; 1AN joins Cu opposite tornus; vein setae medium; single row of papillae (four times larger than general tubercles of wing surface which are clearly arranged in hexagonal mosaic) along corial vein margins but not giving appearance at lower magnification (x80) of pale circles. T8 briefly produced and tapering on right side; left anophoric process is a heavily sclerotised, dark, broad, sinuate, acute process; right anophoric process probably a long strut embracing genital capsule laterally, possibly absent or slender and spinous (lap and rap in Fig. 1E should be transposed); left paramere with short, bulbous base broadly tapering to short distal lobe; right paramere with bulbous base and elongate, curved distal lobe with bilobate apex; one conjunctival process bearing elongate, heavily sclerotized, dark, process with bifid apex; second conjunctival sclerite bearing short, curved spine; vesica spinous, with one loop.

Notes. This species agrees with the generic description above in terms of thoracic structure including wings and legs. The metascutellum is not long unlike that of S. tinnulus .

Figures

FIGURE 1. A – E, Silhouettanus alboclavatus male; A, fore wing, dorsal; B, wing coupling, dorsal through wing; C, labium and antennal base; D, pterosternum; E, T 8 and genital capsule, dorsal (lap and rap in Fig. 1 E should be transposed). Abbreviations: ac, anal cell; bc, basal cell; C 1, major conjunctival process; C 2, minor conjunctival process; dc, discal cell; gc, genital capsule; lap, left anophoric process; lp, left paramere; m, metasternal process; me, metendosternite; ms, mesosternal sulcus; rap, right anophoric process; rc, cell R; rp, right paramere; scc, subcostal cell; t, tornus; tc, trapezoidal cell; v, vesica; II, midcoxa.