Trechus fulvus

Reboleira, Ana Sofia P. S., Ortuño, Vicente M., Gonçalves, Fernando & Oromí, Pedro, 2010, A hypogean new species of Trechus Clairville, 1806 (Coleoptera, Carabidae) from Portugal and considerations about the T. f u l v u s species group, Zootaxa 2689, pp. 15-26 : 24-25

Key to the Iberian species of the “ T. fulvus -group” using aedeagus characters

1. Median lobe of aedeagus visibly turned towards left in dorsal view........................................................................... 2

- Median lobe of aedeagus not turned towards left in dorsal view................................................................................ 7

2. Inner sac very simple with a triangular, arrow-shaped lamina; second lamina (in lateral view) narrowed and the distal end slightly curved downward. .......................................................................................... T. martinezi -lineage … 3

- Inner sac equipped with two pieces, one lamina forming a cylinder open at the left followed by another smaller, rectangular-shaped lamina ( Fig. 6 a)........................................................................................... T. gloriensis Jeanne, 1970

3. Apical lamina short. Internal sac with a very conspicuous close lamina (in lateral view) pouch-shaped with the apex curved downwards. Species from the southwest of the Baetic range (province of Malaga) ( Fig. 6 b) ........................... ................................................................................................................................................... T. breuili Jeannel, 1913

- Apical lamina hypertrophied. Inner sac with close lamina inconspicuous (in lateral view). Species from the east of the Baetic range (province of Alicante). ...................................................................................................................... 4

4. Apical lamina longer than the pieces of the internal sac ............................................................................................. 5

- Apical lamina shorter, roughly as long as the pieces of the internal sac ..................................................................... 6

5. Apical lamina in lateral view, with truncated apex (slightly hooked) ( Fig. 6 c) ..................... T. beltrani Toribio, 1990

- Apical lamina in lateral view, progressively thinned and pointed at the end (sword-shaped) ( Fig. 6 d). ....................... .......................................................................................................................................... T. alicantinus Español, 1971

6. Apical lamina slightly twisted and wider at base than in the middle ( Fig. 6 e) ..................... T. martinezi Jeannel, 1927

- Apical lamina strongly twisted and with the base only slightly wider than the middle ( Fig. 6 f)................................... ............................................................................................................................. T. torressalai Ortuño & Arillo, 2005

7. Apical lamina short and sharp (in dorsal view), raised and hook-shaped (in lateral view). Internal sac with poorly defined conical parts. Species native to the north of the Iberian Peninsula (Burgos and La Rioja) ( Fig. 7 a) ................ ................................................................................................................................................ T. arribasi Jeanne, 1988

- Apical lamina forming a subtriangular area (in dorsal view); the apex blunt finished in lateral view. Sac with two pieces, a triangular lamina and a long, narrow lamina (in lateral view) ...................................................................... 8

8. Internal sac with a narrow lamina (in lateral view) conspicuous and strongly curved downwards. Species from North Africa ( Morocco and Algeria) and from the southern tip of the Iberian Peninsula (Cádiz) ( Fig. 7 b)............................ ........................................................................................................................................ T. lallemantii Fairmaire, 1859

- Internal sac with the lamina slightly spatulated, curved downwards ................................................... T. fulvus -lineage

9. Internal sac without a plate of dorsal scales. Species from the Estremenho karstic massif (Serra d’Aire/São Mamede Plateau) ( Fig. 7 c).................................................................................................... T. lunai Reboleira & Serrano, 2009

- Internal sac with a plate of dorsal scales.................................................................................................................... 10

10. Median lobe (lateral view) strongly enlarged in the middle region; apical region of the median lobe (lateral view) with dorsal margin slightly downing towards apex. Species from the Estremenho karstic massif (Serra dos Candeeiros) ( Fig. 7 d) .................................................................................................................. T. machadoi Jeannel, 1941

- Median lobe (lateral view) not enlarged in the middle region................................................................................... 11

11. Apical region of the median lobe, in lateral view, with dorsal margin abruptly downing before apex. Species from the Estremenho karstic massif (Santo António Plateau) ( Fig. 7 e). ...................... T. gamae Reboleira & Serrano, 2009

- Development of median lobe almost parallel ............................................................................................................ 12

12. Internal sac with a thin close lamina large and twisted, in lateral view. Median lobe with dorsal margin slightly downing before apex. Species from the Montejunto karstic massif ( Fig 7 f)........................................... T. tatai n. sp.

- Internal sac with the close lamina shorter and spatula-shaped. Apical lamina longer ( Fig. 7 g). ................................... ................................................................................................................................................... T. fulvus Dejean, 1831

Figures

FIGURE 6. Aedeagus (lateral and dorsal view) of the species of the T. fulvus - group with the apical lamina visibly turned towards left side in dorsal view. a) T. gloriensis, b) T. breuili, c) T. beltrani, d) T. alicantinus, e) T. martinezi and f) T. torressalai.

FIGURE 7. Aedeagus (lateral and dorsal view) of the T. fulvus - group species with the apical lamina not turned towards left side in dorsal view. a) T. arribasi, b) T. lallemantii, c) T. lunai, d) T. machadoi, e) T. gamae, f) T. tatai n. sp. and g) T. fulvus.