Key to the males of Domene (Lathromene) species

Based on the key to the Iberian Lathromene species (males) by Serrano et al. (2015) (omitting D. hispanica whose male is unknown), we present an updated key including the four species described by Struyve (2018) and Magrini & Carotti (2019) and the two new species:

1. Ventral process not exceeding the aedeagus apical edge; apex of the apophyses pointed (fig. 7e in Reboleira et al. 2011b)..................................................................... D. (L.) lusitanica Reboleira & Oromí, 2011

- Ventral process exceeding the aedeagus apical edge.......................................................... 2

2. Ventral process asymmetrical in ventral view............................................................... 3

- Ventral process symmetrical in ventral view................................................................ 7

3. Ventral process with the apex extending strongly to the left in lateral view........................................ 4

- Ventral process with apex not extending to the left in lateral view............................................... 5

4. Ventral process with an arcuate peduncle and apex axe-shaped in lateral view (fig. 7h in Reboleira et al. 2011b)...................................................................................... D. (L.) scopaeella Fauvel, 1873

- Ventral process with a straight peduncle and the apex of triangular shape in lateral view (figs 10, 11 in Outerelo & Gamarra 2012)......................................................... D. (L.) barraganensis Outerelo & Gamarra, 2012

5. Ventral process very long, delicate and sharp, slightly asymmetrical (fig. 7d in Reboleira et al. 2011b)............................................................................... D. (L.) gallaeciana Feldmann & Hernando, 2005

- Ventral process very long and wide, with considerable torsion and two small basal apophyses in ventral view............ 6

6. Peduncle of ventral process with small tooth in the left side in ventral view; apex axe-shaped in lateral view and finger-shaped in ventral view (fig. 7g in Reboleira et al. 2011b).................................. D. (L.) subiasi (Outerelo, 1977)

- Ventral process without small tooth in the left side in ventral view; apex not axe-shaped in lateral view and leaf-shaped in ventral view (Figs 6a, 6c)............................................................. D. (L.) pedroi sp. nov.

7. Ventral process with bifurcated apex, forming two finger-like lobes.............................................. 8

- Ventral process not bifurcated at apex, at most emarginated.................................................... 9

8. Ventral process with deeply bifurcated apex, clearly surpassing the apex of the aedeagus (fig. 7a in Reboleira et al. 2011b)............................................................................... D. (L.) bergidi Outerelo, 1991

- Ventral process with apex shallowly bifurcated and slightly surpassing the apex of the aedeagus (fig. 7f in Reboleira et al. 2011b)................................................... D. (L.) caurelensis Outerelo, Gamarra & Salgado, 2000

9. Ventral process with large lanceolate apex in ventral view.................................................... 10

- Ventral process with apex differently shaped............................................................... 12

10. Ventral process without lateral or proximal hook-like expansions in apex (fig. 7c in Reboleira et al. 2011b).......................................................................................... D. (L.) gridelliana Fagel, 1967

- Ventral process with hook like expansions in apex.......................................................... 11

11. Ventral process without crested helmet shape apex (lateral view), several strong hook-like expansions in apex (fig. 7b in Reboleira et al. 2011b)....................................................... D. (L.) cantabrica Coiffait, 1973

- Ventral process with crested helmet shape apex (lateral view) (Fig. 4a), base of helmet with a pair of small teeth in middle (Fig. 4d)............................................................................. D. (L.) boavidae sp. nov.

12. Ventral process wide with one big lateral hook-like expansion bent downward in each side in ventral view; dorsal side of aedeagus asymmetric................................................................................. 13

- Ventral process with apex differently shaped............................................................... 14

13. Ventral process with a smaller apical lobe between the two lateral hook-like expansions (figs 26 E–G in Struyve 2018)................................................................................. D. (L.) suidensis Struyve, 2018

- Ventral process with rounded incision between the two lateral hook-like expansions (figs 26 K–M in Struyve 2018).................................................................................. D. (L.) sistelensis Struyve, 2018

14. Ventral process not exceeding largely the apex of aedeagus; apex wide with two small lateral hook-like expansions in each side in ventral view (figs 26 H–I in Struyve 2018)................................. D. (L.) invernadeirensis Struyve, 2018

- Ventral process exceeding largely the apex of aedeagus with apex differently shaped............................... 15

15. Ventral process with a pair of small lateral tooth‒shaped expansions in midway between the apex and the base (fig. 7a in Serrano et al. 2015).................................................... D. (L.) viriatoi Serrano & Boieiro, 2015

- Ventral process without any lateral tooth-shaped expansions in peduncle........................................ 16

16. Peduncle of ventral process parallel in ventral view; apex plough-shaped, short in lateral view (figs P–Q in Struyve 2018)............................................................................... D. (L.) eufemia Struyve, 2018

- Peduncle of ventral process arcuate or slight arcuate in both sides in the middle region in ventral view................ 17

17. Apex of ventral process spearhead-shaped in ventral view; peduncle sides deeply arcuate in the middle region in ventral view (figs 26 N–O in Struyve 2018)..................................................... D. (L.) orensis Struyve, 2018

- Apex of ventral process less spearhead-shaped in ventral view; peduncle sides slightly arcuate in the middle region in ventral view (figs 4–7 in Magrini & Carotti 2019)................................. D. (L.) darinkae Magrini & Carotti, 2019