Identification Key for Siderus as delimited in this paper

(valid for both sexes)

1. VHW with spot in Cu1–Cu2 (Fig. 2f)..................................................................... 2

- VHW without spot in Cu1–Cu2.......................................................................... 3

2. VHW red spot, black pupilled (distally) in Cu1–Cu2......................................................... 4

- VHW black spot in Cu1–Cu2 surrounded by dark orange scales................................. S. castelain sp. nov.

3. VW with brown area at base............................................................................. 5

- VW without brown at base............................................................... S. toussaint sp. nov.

4. VW light brown ground color, wingspan <25 mm ............................................ S. diringeri sp. nov.

- VW wingspan> 25 mm ................................................................................ 6

5. VHW with a basal white mark in Sc+R1-Rs................................................ S. bisignatus sp. nov.

- VHW without white mark in Sc+R1-Rs........................................................... S. athymbra

6. DFW large black apex................................................................................. 7

- DFW reduced black apex............................................................................... 8

7. Ventral ground color light brown................................................................... S. eliatha Ventral ground color dark brown................................................................. S. guapila

8. VHW white postmedian band with a wider and triangular element at the apex............................ S. parvinotus

- VHW white postmedian band with all elements of the same size..................................... S. leucophaeus

The following checklist details nomenclature for the names that we place in Siderus, including new names proposed below.

Siderus Kaye, 1904

type species: Siderus parvinotus Kaye

Bithys Hübner, 1818, not available, suppr. (ICZN, Op. 541).

type species: Rusticus leucophaeus Hübner

Bythis Hübner, [1831], not available, missp.

Siderus leucophaeus (Hübner, 1818) ( Bithys), type locality: Brazil leucophaeus (Hübner, 1801) ( Rusticus), nom. nud halala (Hewitson, 1868) ( Thecla), type locality: Brazil volupia (Hewitson, 1874) ( Thecla), type locality: Nicaragua purpura (H.H. Druce, 1907) ( Thecla), type locality: Brazil (ES)

Siderus parvinotus Kaye, 1904, type locality: Trinidad

Siderus eliatha (Hewitson, 1867) ( Thecla), type locality: Brazil hostis (Schaus, 1902) ( Thecla), type locality: Brazil (RJ)

Siderus diringeri Faynel, Robbins & Fåhraeus sp. nov., type locality: French Guiana.

Siderus toussaint Faynel, Robbins & Fåhraeus sp. nov., type locality: French Guiana.

Siderus guapila (Schaus, 1913) ( Thecla), type locality: Costa Rica

Siderus castelain Faynel, Fåhraeus & Robbins sp. nov., type locality: French Guiana.

Siderus athymbra (Hewitson, 1867) ( Thecla), type locality: Brazil

Siderus bisignatus Faynel, Ramírez & Robbins sp. nov., type locality: French Guiana.