Osbornellus (Nielson and Knight, 2000)

Domínguez, Edwin & Godoy, Carolina, 2010, Taxonomic review of the genus Osbornellus Ball (Hemiptera: Cicadellidae) in Central America 2702, Zootaxa 2702, pp. 1-106 : 6-8

Key to species of Osbornellus ( Costa Rica)

1 Head with colored bands, stains, marks, or lines; wings with white stains and/or dark brown spots ( Fig. 1a, 1b, 1c, 63a, 63b) ....................................................................................................................................................................... 2

- Head without bands, with or without pale stains; wings without stains and dark spots ( Fig. 1d, 63c). ..................... 43

2 Anterior margin of vertex with two thick, brown lines; clypeus generally without marks ( Fig. 64b) ...................... 10

- Anterior margin of vertex with 1 or 2 narrow, brown lines, or without lines, spots or marks, clypeus generally with marks ( Fig. 64a) ............................................................................................................................................................ 3

3 Vertex with pale mark bordered with dark brown or other marks; scutellum posteriorly without large, white, M-like mark ( Fig. 1b) ............................................................................................................................................................... 4

- Anterior margin of vertex cream, posteriorly with large dark band (likeglasses); scutellum posteriorly with large, white, M-like mark ( Fig. 9)............................................................................................................. O. linetteae sp. nov.

4 Anterior margin of vertex with beige band, center of vertex with dark mark ( Fig. 8) ................... O. obamai sp. nov.

- Anterior margin of vertex with pale yellow band, with or without lines ( Fig. 68); vertex with orange band ............. 5

5 Anterior margin of vertex with broad yellow band ( Fig. 1c)........................................................................................6

- Anterior margin of vertex with pale band bordered with narrow brown bands ( Fig. 1b)............................................. 7

6 Anterior margin of vertex with pale band bordered with narrow brown bands; dorsal part of vertex depressed in middle(Fig. 65a)............................................................................................................................................................ 8

- Anterior margin of vertex with wide pale band bordered with one inferior narrow brown band and an irregular brown band; vertex not depressed in middle ( Fig. 69)............................................................................... O. fuentesi sp. nov.

7 Vertex with two narrow dark bands and five white spots ( Fig. 66b) .......................................................................... 24

- Vertex with two dark lines and one white band in between ( Fig. 66a) ......................................................................... 9

8 In ventral view, ventral processes of aedeagus nearly straight, slightly divergent, in lateral view nearly parallel to shaft, shaft curved caudad ( Fig. 35)................................................................................................... O. maesi sp. nov.

- In ventral view, with ventral processes of aedeagus distinctly curved laterad, in lateral view divergent from aedeagus; shaft slightly curved ventrad apically ( Fig. 36).......................................................................... O. lewisi sp. nov.

9 Head orange or with red band. In lateral view, shaft of aedeagus wide and short ( Fig. 13, 54e) ................................... ................................................................................................................................................... O. blantoni Linnavuori

- Head with pale brown band. In lateral view, shaft of aedeagus long and slender ( Fig. 14, 55e).................................... ............................................................................................................................................ O. fulvomaculatus (Osborn)

10 Anterior margin of vertex with two black lines similar width, both slender (Fig. 65b). ............................................ 11

- Anterior margin of vertex with two black lines, one slender and the other thicker (Fig. 65d)................................... 16

11 Anterior margin of vertex with two blacks lines and a wide white band in between (Fig. 65b) ............................... 12

- Anterior margin of vertex with two blacks lines and a slender white band in between (Fig. 65d) ........................... 15

12 Anterior margin of vertex with lines not angulate vertex rounded (Fig.65b). ........................................................... 13

- Anterior margins of vertex with lines forming angle in the middle of vertex and triangular vertex ( Fig. 70a). ........ 14

13 In ventral view, aedeagus longer than ventral processes, processes straight; in lateral view, aedeagus and processes curved dorsad ( Fig.1a, 16a–e) ...................................................................................................... O. eberhardi sp. nov.

- In ventral view, aedeagus shorter than ventral processes, processes divergent to apices; in lateral view, aedeagus and processes curved ventrad ( Fig. 26a–e) ........................................................................................ O. anonae Linnavuori 14 Body brown; wings with marks; aedeagus with ventral processes rugose ( Fig. 10, 47d–e, 70c)................................... .................................................................................................................................................. O. chichiziensis sp. nov.

- Body reddish; wings without marks; aedeagus with ventral processes smooth ( Fig. 4, 28d–e, 70b)............................. .......................................................................................................................................................... O. afflexus sp. nov.

15 Aedeagus without ventral processes, in ventral view apex rounded with preapical expansion ( Fig. 27a–e). ................ ................................................................................................................................................ O. sineprocessus sp. nov.

- Aedeagus with ventral processes, in ventral view apex of aedeagus rounded. In lateral view with apodeme fine and short ( Fig. 17a–e) ............................................................................................................... O. pseudopuniceus sp. nov.

16 In ventral view, ventral aedeagal processes with apices convergent, in lateral view overlapping shaft ( Fig. 15a–e) .... ............................................................................................................................................................. O. trinax sp. nov.

- In ventral view, ventral aedeagal processes with apices straight or divergent, in lateral view not overlapping shaft.... ..................................................................................................................................................................................... 17

17 In ventral view, ventral aedeagal processes with apices divergent ............................................................................. 18

- In ventral view, ventral aedeagal processes with apices straight ................................................................................ 21

18 In ventral view, ventral aedeagal processes with apices broad preapically and strongly divergent ( Fig. 18a–e)........... ......................................................................................................................................................... O. aielloae sp. nov.

- In ventral view, ventral aedeagal processes with apices narrower and weakly divergent ......................................... 19

19 In lateral view, shaft of aedeagus and ventral processes curved dorsad ( Fig. 22e). .................... O. springerae sp. nov.

- In lateral view shaft of aedeagus slightly curved dorsad ........................................................................................... 20

20 In lateral view, ventral processes of aedeagus subequal in length to shaft, processes divergent from shaft ( Fig. 20e).. ...................................................................................................................................................... O. bifurcatus sp. nov.

- In lateral view, ventral processes of aedeagus distinctly longer than shaft, close to shaft then separated slightly for two thirds of length ( Fig. 25e) ................................................................................................... O. divaricatus sp. nov.

21 In ventral view, ventral processes of aedeagus separated nearly from base, slender, of similar width where the processes diverge; in lateral view, dorsal apodeme slender, ventral processes and aedeagus close together ( Fig. 24d–e) ........................................................................................................................................................... O. ligatus sp. nov.

- In ventral view, ventral processes of aedeagus separated for one third length of aedeagus, thicker, wider where they separate, base of aedeagus less curved or flattened; in lateral view, dorsal apodeme wide, ventral processes and aedeagus slightly to strongly divergent .............................................................................................................................. 22

22 In lateral view, dorsal apodeme rounded, ventral processes and aedeagus weakly divergent ( Fig. 19d–e) ................... ........................................................................................................................................................ O. quirosae sp. nov.

- In lateral view, dorsal apodeme truncate, ventral processes and aedeagus strongly divergent .................................. 23

23 In lateral view, aedeagus curved dorsad, nearly in a semicircle, apex curved slightly caudad; ventral processes curved dorsad in basal half and caudad in apical half ( Fig. 23e).................................................... O. bartletti sp. nov.

- In lateral view, aedeagus slightly curved and ventral processes slightly curved dorsad ( Fig. 21e) ............................... .......................................................................................................................................................... O. emmeni sp. nov.

24 Vertex depressed in the middle ( Fig. 67b) .................................................................................................................. 25

- Vertex not depressed in the middle ( Fig. 67a) ............................................................................................................ 26

25 In ventral view, ventral processes of aedeagus with apices triangular and spear-like; in lateral view, apex of aedeagus with small notch, ventral processes close and parallel ( Fig. 41a–e) ................................................ O. bitelum sp. nov.

- In ventral view, ventral processes of aedeagus with apices acuminate; in lateral view ventral processes overlaping aedeagus ( Fig. 52a–e) ...................................................................................................................... O. hansoni sp. nov.

26 In ventral view, ventral processes of aedeagus widely divergent .............................................................................. 27

- In ventral view, ventral processes of aedeagus slightly divergent or crossing over, or without processes................. 29

27 In lateral view aedeagus shaft slender......................................................................................................................... 28

- In lateral view aedeagus shaft wide ( Fig. 30e) .............................................................................. O. expositus sp. nov.

28 In lateral view aedeagus shaft long and curved dorsad ( Fig. 42e) ....................................... O. villamillsiensis sp. nov.

- In lateral view aedeagus shaft shorter and straight dorsad-caudad ( Fig. 59e) ................................ O. pallidus Beamer

29 In ventral view, ventral processes of aedeagus crossing each other far from apex .................................................... 30

- In ventral view, ventral processes of aedeagus not crossing each other or only apices crossing, or without processes ..................................................................................................................................................................................... 33

30 In lateral view, shaft of aedeagus and dorsal apodeme wide ( Fig. 33d–e).............................. O. costaricensis sp. nov.

- In lateral view, shaft of aedeagus and dorsal apodeme slender................................................................................... 31

31 In ventral and lateral view, ventral processes of aedeagus slender and separated from aedeagus.............................. 32 - In ventral and lateral view, ventral processes of aedeagus wide; in lateral view ventral processes and aedeagus close together ( Fig. 46d–e) ........................................................................................................................... O. inbio sp. nov.

32 In ventral view, right ventral process passing above left process of aedeagus, dorsal projection present ( Fig. 43d–e). ......................................................................................................................................................... O. cruxatus sp. nov.

- In ventral view, left ventral process of aedeagus passing above right process, dorsal projection absent ( Fig. 39d–e) .. .................................................................................................................................................... O. transversus sp. nov.

33 In ventral view ventral processes of aedeagus not crossing over, or processes absent .............................................. 34

- In ventral view ventral processes of aedeagus crossing over at apices ( Fig. 50d) ................ O. corcovadiensis sp. nov.

34 Ventral processses of aedeagus absent ........................................................................................................................ 35

- Ventral processses of aedeagus present, not crossing over ........................................................................................ 36

35 Shaft of aedeagus with three projections at apex ( Fig. 49d–e) ................................................... O. trifurcatus sp. nov.

- Shaft of aedeagus bifurcate at apex ( Fig. 57d–e)........................................................................... O. libratus DeLong

36 Aedeagus in ventral view with base expanded and rounded laterally, shaft slender, ventral processes apressed to aedeagus; in lateral view shaft slender, semicircular and curved dorsad, ventral processes apressed to shaft ( Fig. 51d e) ................................................................................................................................................ O. albocinctus DeLong

- Aedeagus without combination of about caracteristics............................................................................................... 37

37 In lateral view, ventral processes longer than aedeagus.............................................................................................. 38

- In lateral view, ventral processes shorter than aedeagus.............................................................................................40

38 In ventral view, aedeagus with ventral processes close together basally, separated in apical third, touching at apices ( Fig. 32d) ....................................................................................................................................... O. coopertus sp. nov.

- In ventral view, aedeagus with ventral processes separated for their entire length, close together or separated at apices. .............................................................................................................................................................................. 39

39 In ventral view, aedeagus with ventral processes separated at apices; in lateral view, dorsal apodeme truncate ( Fig. 29d) ....................................................................................................................................................... O. latus sp. nov.

- In ventral view, aedeagus with ventral processes close together at apices; in lateral view, dorsal apodeme not truncate ( Fig. 31d–e) ...................................................................................................................................... O. freytagi sp. nov.

40 In lateral view, ventral processes of aedeagus much shorter than shaft and separated ( Fig. 38e) .................................. .................................................................................................................................................. O. diamantinus sp. nov.

- In lateral view, ventral processes of aedeagus slightly shorter than aedeagus and close together ............................. 41

41 In ventral view, ventral processes of aedeagus curved laterad and then mesad ( Fig. 61c) ................. O. rarus DeLong

- In ventral view, ventral processes straight .................................................................................................................. 42

42 In ventral view, ventral processes with apices straight; in lateral view, shaft slender and slightly separated from base ( Fig. 58a–e) ...................................................................................................................................... O. lineatus Beamer

- In ventral view, ventral processes with apices lance-like; in lateral view, shaft slender and apresssed to shaft ( Fig. 40a–e)........................................................................................................................................ O. lanceolatus sp. nov.

43 Ventral processses of aedeagus with with sclerotized spirals .................................................................................... 44

- Ventral processses of aedeagus smooth ...................................................................................................................... 45

44 In lateral view, ventral processes of aedeagus curved dorsad then caudad ( Fig.53e) ...................... O. affinis (Osborn)

- In lateral view, ventral processes of aedeagus curved caudad then ventrad ( Fig. 62e)................... O. reversus DeLong

45 In ventral view, shaft of aedeagus longer than ventral processes; in lateral view, ventral processes directed caudad ( Fig. 48d–e) ......................................................................................................................... O. ichnoscapitatus sp. nov.

- In ventral view, shaft of aedeagus same length or shorter than ventral processes; in lateral view, ventral processes curved dorsad or slightly caudad ............................................................................................................................... 46

46 In ventral view, ventral processes the same length as aedeagus; in lateral view, shaft S-shaped, curved caudad ( Fig. 34d–e). ........................................................................................................................................ O. thompsoni sp. nov.

- In ventral view, ventral processes shorter than aedeagus; in lateral view shaft not S-shaped, curved dorsad............ 47

47 In ventral view, ventral processes of aedeagus straight; in lateral view, aedeagus curved dorsad in a semicircle ( Fig. 56d–e) ................................................................................................................................... O. compressus Linnavuori

- In ventral view, ventral processes of aedeagus divergent; in lateral view, shaft curved sligthly dorsad ( Fig. 60a–e).... .......................................................................................................................................................... O. nielsoni sp. nov.