Stenosmylus McLachlan, 1867

Winterton, Shaun L., Martins, Caleb Califre, Makarkin, Vladimir, Ardila-Camacho, Adrian & Wang, Yongjie, 2019, Lance lacewings of the world (Neuroptera: Archeosmylidae, Osmylidae, Saucrosmylidae): review of living and fossil genera, Zootaxa 4581 (1), pp. 1-99 : 80

Stenosmylus McLachlan, 1867

( Figs 60–62 )

Type species. Osmylus tenuis Walker, 1853: 234 (by subsequent designation).

Diagnosis. Antennae length ca. FW length; female forecoxa without pedicellate setae or anteroventral process; wings narrow, hyaline with dark mottled venation and irregular suffusions; costal area relatively narrow, subcostal veinlets rarely forked; FW stem of RP long, RP originating distant from wing base, RP1 originating far from origin of RP; RP branches slightly to strongly sinuous distally in both wings; end-twigging mostly regular but intermittent, very close to margin of wing; FW M fork well beyond midpoint of wing, close to wing margin, pectinately branched (ca. 4–5 branches), MP rarely fused to CuA (see discussion under Stenolysmus ); female with all FW veins regular, not incrassate; FW CuA and CuP not arched towards posterior wing margin distally; FW 2A very short, terminates in wing margin before origin of first branch of RP; male tergites 8 and 9 fused, ectoproct rounded; gonarcus medially rounded or with medial process; entoprocessus short and broad. female with sternite 8 concave with posterolateral lobes rounded and setose; gonapophysis 9 slender, bifid at apex; tergite 9 ventrally broad; gonocoxites 9 lacking fringing row of setae.

Comments. Stenosmylus is recorded from eastern Australia ( New 1986), although S. tenuis is the only Osmylidae known also found in Western Australia (unpublished data). The setose posterolateral lobed processes of the female sternite 8 are similarly found in Phymatosmylus , Isostenosmylus , Oedosmylus and Stenolysmus and may indicate the basic form for the subfamily. The fork of the forewing medial vein in the distal part of the wing is characteristic for the genus.

Included species.

S. stenopterus McLachlan, 1867 ( Australia)

S. tenuis ( Walker, 1853) ( Australia)

S. turneri Kimmins, 1940 ( Australia)

Figures

FIGURE 60. Stenosmylinae. Stenosmylus stenopterus McLachlan.

FIGURE 61. Stenosmylinae. Stenosmylus tenuis (Walker).

FIGURE 62. Stenosmylinae. Stenosmylus stenopterus McLachlan, wing venation (after Cousin & Béthoux, 2015) (vestiture omitted).