Actinopus undetermined

Ríos-Tamayo, D. & Goloboff, P. A., 2018, Taxonomic Revision And Morphology Of The Trapdoor Spider Genus Actinopus (Mygalomorphae: Actinopodidae) In Argentina, Bulletin of the American Museum of Natural History 2018 (419), pp. 1-84 : 12-13

KEY TO MALE ACTINOPUs SPECIES FROM ARGENTINA

Males of A. indiamuerta are unknown.

1. Copulatory bulb thin and almost straight (figs. 4E–G, 6D–F, 8G–I); sigilla I– II small (fig. 8B) (type I morphology)......................2

– Copulatory bulb wide, strongly sinuous (figs. 10G–I, 12D–F, 13D–F, 15D–F, 16D–F, 18E– G, 21B–D, 23G–I, 25D–F, 26D–F, 27G–I, 29E–G, 31D–F, 32D–F, 34D–F, 36D–F, 38D–F, 39E–G, 41E–G); sigilla I–II elongate (fig. 10C...................................................4

2. Small size (body length <10.56 mm); color light brown or beige; spiniform bristles on dorsum of femora III and P on trochanter III......................................................................3

– Larger size (body length>12.96), color dark reddish brown (fig. 6A), without spiniform bristles on dorsum of femora III or P on trochanter III..................... A. reycali , sp. nov.

3. Chelicerae with small anterior retrolateral keels (fig. 8D); bulb keels and ATA developed (fig. 8G, H)....................... A. septemtrionalis , sp. nov.

– Chelicerae without keels; bulb keels very low, ATA scarcely visible (fig. 4G) ........................ ............................................. A. claveo , sp. nov.

4. Thoracic fovea continuous, sternum center flat or with only a slight depression (fig. 23B) (type II morphology)............................5

– Thoracic fovea discontinuous, interrupted in the middle (fig. 41A); sternum with a deep central depression (fig. 41B) (type III morphology).................................................20

5. Copulatory bulb with embolus arising apically; ATB small; embolus thin (figs. 10G– I, 23G–I, 27G–I)..............................................6

– Copulatory bulb with embolus arising more medially; ATB large; embolus thick (figs. 12D–F, 13D–F, 15D–F, 16D–F, 18E–G, 21B–D, 25D–F, 26D–F, 29E–G, 31D–F, 32D–F, 34D–F, 36D–F, 38D–F, 39E–G, 41E–G ..............................................................8

6. Abdomen with brown dorsum ......................... ................... Actinopus longipalpis Koch, 1842

– Abdomen with silvery gray dorsum (fig. 10D)...........................................................................7

7. Copulatory bulb with a depression near the base of embolus (fig. 27B), tibia II with less than 5 retrolateral spines (fig. 27E)............... ............................................ A. pampa , sp. nov.

– Copulatory bulb without depression, tibia II with more than 10 retrolateral spines (fig. 10G–I)........................... A. argenteus , sp. nov.

8. AME small (≤ 0.16 mm) (figs. 12A, 15A, 16A, 18A, 26A, 34A, 36A)......................................9

– AME large (≥ 0.20 mm) (figs. 13A, 21A, 25A, 29A, 31A, 32A).............................................15

9. RMk present (fig. 3B)......................................10

– RMk absent........................................................12

10. Spiniform bristles on dorsal femur III (fig. 18D)................................................................11 – No spiniform bristles on dorsal femur III ....... ............................................ A. taragui , sp. nov.

11. Copulatory bulb with a parembolic apophysis (fig. 26D–F)................. A. palmar , sp. nov.

– Copulatory bulb without paraembolic apophysis......... A. gerschiapelliarum , sp. nov.

12. Legs with lighter colored tarsi......................13

– Legs with lighter colored metatarsi and tarsi.....14

13. Many (14) retrolateral thorns on tibia II (fig. 34C)........................ A. szumikae , sp. nov.

– Few (<9) retrolateral thorns on tibia II (fig. 16C)...................................... A. coylei , sp. nov.

14. ATA wide (fig. 12D, F)........ A. ariasi , sp. nov.

– ATA narrow (fig. 15D, F)..................................... ..................................... A. cordobensis , sp. nov.

15. Sternum center with slight depression.......16

– Sternum center flat...........................................17

16. ATA oriented upward (fig. 25D, F) ................ .............................. Actinopus magnus , sp. nov.

– ATA oriented laterally (fig. 29E, G) .................. .......................... Actinopus patagonia , sp. nov.

17. Cheliceral projection without cusps............18

– Cheliceral rastellum with cusps......................19

18. RMk present, palp tibia long and slender (fig. 32B) ........................ A. ramirezi , sp. nov.

– RMk absent, palp tibiae short and thickened (fig. 13C)......................... A. casuhati , sp. nov.

19. Small size (body length <8.10 mm); color light brown, northern Buenos Aires .............. ............. Actinopus insignis ( Holmberg, 1881)

– Large size (body length>9.60), color dark brown, southern Buenos Aires ...................... .............................................. A. puelche sp.nov.

20. Anterior angle of coxa I–II with a projection (fig. 41B) ................................................... ......... Actinopus goloboffi Ríos-Tamayo, 2014

– Projection present only on the anterior angle of coxae I, absent from II............................21

21. ATA well developed (fig. 39E, G), horizontally oriented; numerous (22) retrolateral thorns on tibiae II (fig. 39D).......................... ........................................ A. excavatus , sp. nov.

– ATA little developed (fig. 38D, F), oriented upward; few (7) retrolateral thorns on tibiae II (fig. 38B)................ A. balcarce , sp. nov.