Taxonomic revision of Schausiana Viette with two new species from Guatemala and notes on biogeography and correlated tectonics (Lepidoptera: Hepialidae) Author Mielke, Carlos G. C. Caixa postal 1206, 84.145 - 000 Carambeí, Paraná, Brazil. Author Grehan, John R. Research Associate, McGuire Center for Lepidoptera & Biodiversity, Gainesville, FL 32611, USA. Author Monzón-Sierra, José 0000-0002-0733-1895 Centro de Estudios Ambientales y Biodiversidad, Universidad del Valle de Guatemala, 18 Avenida 11 - 95 Zona 15, Vista Hermosa III, Guatemala, Guatemala, C. A. jmonzon @ uvg. edu. gt; https: // orcid. org / 0000 - 0002 - 0733 - 1895 jmonzon@uvg.edu.gt text Zootaxa 2020 2020-10-09 4860 1 67 91 journal article 8225 10.11646/zootaxa.4860.1.3 a333c0b8-de3f-4f3b-a9b9-05453686efc4 1175-5326 4413508 38F1E2A5-5DE0-4B95-959A-6347BC593AF0 Schausiana Viette, 1950a Type-species: Phassus trojesa Schaus, 1901 , by original designation; monotypic. Viette (1950a: 80) .— Viette (1951a: 79) .— Paclt (1953: 143) .— Edwards & Hopwood (1966: 266) .— Nielsen & Robinson (1983: 18) .— Robinson & Nielsen (1984: 17) .— Nye & Fletcher (1991: 273) .— Nielsen et al . (2000: 841) .— Grehan (2010: 47 ; fig. V, appendix).— Mielke & Grehan (2012: 148) .— Grehan (2012: 14) .— Mielke & Grehan (2015: 113) .— Grehan & Rawlins (2016: 47) .—Mielke & Grehan (2017: 136) .—Grehan et al . (2018: 63). Diagnosis . Distinguished from all other Hepialidae by unique scales on the FW veins, and by the combination of the following characters: (i) labial palpus unisegmented, sometimes with remnants of segment fusion, (ii) antenna filiform, (iii) ♂ metatibia hypertrophied and androconia present, (iv) ‘hepialine’ venation, (v) ♂ HW 1A incomplete, and (vi) ♀ HW CuP barely complete. Redescription . Males ( Figs 6–7 , 9 , 12 , 14 , 17–18 , 23–26 , 28, 30, 32 , 34–36 ). Head . Clypeus glabrous anteriorly, mesally projected and differentiated from the frons. Frons with piliform and porrect scales. Vertex scales as for the frons, but shorter. Eyes large, occupying 4/5 of the head in anterior view. Labial palps unisegmented ( Fig. 23 ) with indentations sometimes indicating fusion of at least two palpomeres. Antenna filiform, segments cylindrical, sensilla caetica and sensilla trichodea present. Thorax. Legs ( Figs 24–25 ): metatibia hypertrophied (twice as long as wide) with androconia; arolium absent. Venation ( Fig. 26 ): FW without Sc1; HW without Sc1, CuP complete, 1A incomplete, and 2A+3A complete. DFW with specialized scales along the veins, long ( 1–10 mm ) and piliform in S . trojesa and S . maishei sp . n . , white and shortened spines in S . phalerus (Druce, 1887) comb . n . , and S . chalciope sp . n . , and thinly piliform, longer than regular porrect scales in S . pharus comb . n . (figured for ♀ , Figs 2–5 ). Although absent in S . pharus comb . n , all the other species have black ovoid markings in the proximal anal area of the DFW. The FW U-band generally extends posteriorly almost to the A vein. Abdomen ( Figs 28, 30, 32 ). Tergosternal sclerite simple, intermediate zone without any protruding knob. Sternite II compressed laterally with shallow concave edges, tergite and sternite VIII sclerotized. Male genitalia ( Figs 34–36 ). Tegumen fused to the pseudotegumen, but distinguished by a less sclerotized fusion line, ventrally articulated with saccus. Saccus U-shaped on posterior and anterior margins. Tergal lobes reduced and fused to the pseudotegumen, but distinctly sclerotized; each dorso-mesally connected by a thick membrane. Pseudotegumen dorso-mesally unfused and ventro-mesally fused. Fultura inferior and fultura superior present. Valva curved with a distinct elbow, and with a basal and densely sclerotized process. Phallus without cornutus. Females ( Figs 1, 2–5 , 8 , 10–11 , 13 , 15–16 , 19–22, 27 , 29, 31, 33 , 37–41 ). Head . As for the ♂ . Labial palps unisegmented ( Fig. 22 ). Thorax . Venation ( Fig. 27 ): HW with CuP mesally barely complete, 1A and 2A+3A complete. FW, specialized scales as for the ♂ ( Figs 2–5 ). Abdomen . As for the ♂ ( Figs 29, 31, 33 ). Female genitalia ( Figs 37–41 ). Corpus bursae with diverticulum for at least S . trojesa and S . pharus comb . n . , where is the internal genitalia are preserved. Geographical distribution . Schausiana is known to occur from Mexico to Costa Rica ( Fig. 48 ). Etymology . Viette (1950) did not explicitly state the etymology for this genus, but he likely proposed it in honour of William Schaus, a prominent American lepidopterist. Remarks . Some other potential diagnostic characters have been found only where male and female genitalia have been dissected: (i) pseudotegumen dorso-mesally unfused while ventro-mesally fused, (ii) basal portion of the valve with spiny or hook process (both detected in S . trojesa , S . maishei sp . n . , and S . pharus (Druce, 1887) comb . n ), and (iii) corpus bursae with diverticulum (detected in S . trojesa and S . pharus comb . n . ). For comparison with other genera, see the discussion section.