Stenophragma, Skuse, 1890

Bechev, Dimitar & Kazandzhieva, Svetlozara, 2020, A new species of Stenophragma Skuse from Borneo (Diptera: Mycetophilidae Sciophilinae), Zootaxa 4819 (1), pp. 195-200 : 199-200

Key to the extant species of Stenophragma

1. Thorax and abdomen light brown to dark brown. Australian species …........................................... 2

- Thorax and abdomen yellow-brownish or reddish-yellow. Non-Australian species …............................... 6

2. Thorax and abdomen deep brown to dark brown ….......................................................... 3

- Thorax light brown.................................................................................… 5

3. Coxae yellow …....................................................................... S. hirtipenne Skuse

- At least hind coxae deep brown …....................................................................... 4

4. M 4 strongly sinuous ( Skuse 1890: Plate XIX, Fig. 5 ) …........................................ S. picticorne Skuse

- M 4 not sinuous ( Skuse 1888: Plate XXXI, Fig. 9 ) …....................................... S. meridianum (Skuse)

5. M 4 strongly curved basally ( Oliveira & Amorim 2012: Fig. 3 ). Tergite 9 with apex as wide as base, rounded distally, with typical waist close to apex ( Oliveira & Amorim 2012: Fig. 7 ). Gonostyle with numerous strong spines, median branch with two rows of short spines ( Oliveira & Amorim 2012: Figs 9–11 ) …............................... S. bickeli Oliveira & Amorim

- M 4 moderate curved basally ( Oliveira & Amorim 2012: Fig. 4 ). Tergite 9 widening to the apex ( Oliveira & Amorim 2012: Fig. 16). Gonostyle with three strong spines of different sizes and with nine regular rows of short spines ( Oliveira & Amorim 2012: Fig. 18) ….................................................................. S. collessi Oliveira & Amorim

6. Thorax and abdomen reddish-yellow. The angle between M 4 and CuA is close to 45 degrees (M 4 not strongly curved basally) ( Matile 1991: Fig. 12 ). Basal stripe of the wing incomplete. Only females known…............... S. paponorum Matile

- Thorax and abdomen yellow-brownish. The angle between M 4 and CuA is close to 90 degrees (M 4 strongly curved basally) ( Fig. 3 ). Basal stripe of the wing almost complete.......................................... … S. borneense sp. n.

Figures

FIGURE 12. Habitat of studied specimens of Stenophragma borneense sp. n.

FIGURES 3–6. Stenophragma borneense sp. n. 3—wing, male paratype; 4—left wing, male paratype and 5—right wing, same male paratype (in grayscale); 6—R cell of the wing, another male paratype, not to scale.

FIGURES 7–11. Stenophragma borneense sp. n. 7—male terminalia, dorsal view, paratype; 8—male terminalia, ventral view, same paratype, with dashed line are marked some features, not well visible in the photos; 9—left gonostyle, ventral view; 10 and 11—distal part of right gonostyle, frontal view (9, 10 and 11—male paratype, genitalia disassembled). Scale 0.1 mm. Abbreviations: T9 = tergite 9; gonost = gonostyle; spin = spines; r spin = rows of spines.