Microthyris anormalis ( Guenée, 1854 ),

Bernard Landry, 2016, Taxonomic revision of the Spilomelinae (Lepidoptera, Pyralidae s. l.) of the Galápagos Islands, Ecuador, Revue suisse de Zoologie 123 (2), pp. 315-399: 355-357

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http://doi.org/ 10.5281/zenodo.155309

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Microthyris anormalis ( Guenée, 1854 )


Microthyris anormalis ( Guenée, 1854) 

Figs 36View Figs 33 - 40, 114View Figs 113 - 115, 160View Figs 158 - 162

Botys anormalis Guenée, 1854: 352  .

Microthyris anormalis (Guenée)  : Roque-Albelo & Landry,


Material examined: 15 ♂, 20 ♀, 4 of undetermined sex from the Galápagos Islands: – Isabela: Punta Albermarle, SW old US radar site; 1 km W Puerto Villamil; Sierra Negra, 11 km N Puerto Villamil, GPS: S 00° 87.613’, W 91° 00.903’; 3 km N S[an]to Tómas, Agr[iculture]. zone; Sierra Negra, pampa zone, 1000 m; V[olcan]. Darwin, 300 m elev[ation].; Alcedo, lado NE, 400 m, camp pegapega; ± 15 km N P[uer]to Villamil. – San Cristóbal: near Loberia, sea level, GPS: S 00° 55.277’, W 89° 36.909’; 4 km SE Pto Baquarizo [sic]; 1 km S El Progreso; base of Cerro Pelado; La Toma, ca. 6.5 km east El Progreso, GPS: 299 m elev., S 00° 55.356’, W 89° 31.089’; pampa zone; El Junco, east side, GPS: 654 m elev., S 00° 53.734’, W 89° 28.727’. – Santa Cruz: transition zone, recently cut road, GPS: S 00°42.528’, W 90°18.849’; Finca Vilema, 2 km W Bella Vista; Horneman Farm, 200 m; Horneman Farm, 220 m; Los Gemelos; Media Luna. Deposited in AMNH, CAS, CDRS, CNC, MCZ, and MHNG.

Diagnosis: The greyish brown wings with dirty white to pale cream spots on the forewing and a pair of black lines on the hindwing ( Fig. 36View Figs 33 - 40) will easily allow for this species to be identified among Galápagos Spilomelinae. other species has a combination of the presence of paler spots on the forewing and only darker lines on the hindwing. In Samea coffea  sp. n. ( Figs 55, 56View Figs 49 - 56) the more numerous paler markings of the forewing are partly linear and on the hindwing, the darker lines are generally outlined by paler scaling and there is usually a submedian spot with paler centre. Wingspan: 24-30 mm.

Biology: One CDRS specimen labelled ‘106’ refers to a note mentioning ‘Ipomoea’ as the ‘food’. Robinson et al. (2014) report it from Convolvulaceae  [sweet potato, Ipomoea batatas  (L.) Lam. and common morning glory, Ipomoea purpurea  (L.) Roth]. Heppner (2003) adds Turbina corymbosa  (L.) Raf. ( Convolvulaceae  ), a native Mexican morning glory that has become invasive elsewhere. Available Galápagos specimens have been collected from the littoral zone up to about 1000 m in elevation, in habitats ranging from anthropized to nearly pristine, from February until June.

Distribution: Widespread in the Western Hemisphere, it has been recorded from the USA (Florida and Texas), south through the Antilles, Central America and South America to Brazil, Bolivia, Paraguay, and Ecuador ( BMNH and MHNG specimens; Patterson et al., 2015). On the Galápagos so far this species has been found on Isabela, San Cristóbal, and Santa Cruz.

Remarks: This species was described from a male from Brazil. This holotype would normally be in the BMNH, but it wasn’t found there or elsewhere. The Galápagos specimens match the original description and specimens identified as such in the BMNH.


American Museum of Natural History


California Academy of Sciences


Invertebrate Collection


Canadian National Collection of Insects, Arachnids, and Nematodes


Museum of Comparative Zoology


Museum d'Histoire Naturelle














Microthyris anormalis ( Guenée, 1854 )

Bernard Landry 2016

Botys anormalis Guenée, 1854 : 352

Guenee M. A. 1854: 352