Calonotos acutipennis Zerny, 1931

Zerny, H. (1931). Ergebnisse einer zoologischen Sammelreise nach
Brasilien, insbesondere in das Amazonasgebiet, ausgefuehrt von Dr. H.
Zerny. VII. Teil. Lepidoptera III: Die Syntomiden des Staates Para.
Annalen des Naturhistorischen Museums in Wien 45: 225-263; pp. 242-243,
no. 98.

98. Calonotos acutipennis nov. spec. male female.

In the male sex characterised by the distinctly triangular fore wings,
whose termen is not rounded but almost straight, indeed even slightly
indented at the end of vein 5. Veins 2 and 3 are somewhat bent upwards,
and the submedian interspace on the underside is covered with fine
androconia. The hyaline spot at the end of the cell is fairly large and
bounded by straight lines on the inner and lower sides, so that it shows
an inner, lower corner; above and outside it is rounded. The hyaline spot
in the submedian interspace is elongate and lies about below the middle
of the cell. The hyaline cell spot of the hind wing is likewise fairly
large and reaches to the stalk of veins 2-4; it is divided by the
black-scaled median fold into two parts, of which the upper is much the
larger. The female differs from the male by a third hyaline spot in
interspace 2 of the fore wing, which is roughly oval and smaller than the
cell spot. Fore wing length 15-16 mm.

Taperinha, middle and end of June, 2 males 2 females at light.

[Zerny's preamble to the three new species, following no. 97 Calonotos
triplagus, p. 242:]
I have before me 3 further new species from the closest relationship of
chalcipleurus and triplagus, which all agree completely with these two in
the colouration and pattern of the body as well as in the wing
colouration, but which can easily be distinguished by the shape and
markings of the wings, at least in the male sex; the females, of whose
assignment to the males I am moreover not entirely certain, are
admittedly only difficult to tell apart.
Translated from the German original.

Pinheiro, L. R. & Gaal-Haszler, S. (2015). Illustrated catalogue of
Neotropical Ctenuchina, Euchromiina and Pericopina types (Lepidoptera,
Erebidae, Arctiinae, Arctiini) described by Hans Zerny, with discussion
on their taxonomic status. Zootaxa 3925(4): 505-535; pp. 517-518, figs.
24-25: lectotype male designated, Taperinha near Santarem, Para, Brazil
(Naturhistorisches Museum Wien), with one male and two female
paralectotypes.