Orobothriurus, MAURY, 1976

Ochoa, José A., Ojanguren Affilastro, Andres A., Mattoni, Camilo I. & Prendini, Lorenzo, 2011, Systematic Revision Of The Andean Scorpion Genus Orobothriurus Maury, 1976 (Bothriuridae), With Discussion Of The Altitude Record For Scorpions, Bulletin of the American Museum of Natural History 2011 (359), pp. 1-90 : 14-15

KEY TO IDENTIFICATION OF THE SPECIES OF OROBOTHRIURUS

1. Tergites I–VI entirely and densely pigmented (fig. 12D); metasomal segments I–V, VM stripe contiguous with paired VL stripes posteriorly (fig. 11A); metasomal segment IV, VSM carinae present (fig. 16B); angle formed between pedipalp chela trichobothria eb–Et 5 – Et 4 less than 90 ° (fig. 25A)...... O. ampay

– Tergites I–VI each with paired lateral spots of pigmentation delimiting unpigmented median longitudinal stripe (fig. 13C, E–G); metasomal segments I–V, VM stripe not contiguous with paired VL stripes posteriorly (at least on segments IV and V; figs. 11B–D, 13A, D); metasomal segment IV, VSM carinae absent (fig. 17A); angle formed between pedipalp chela trichobothria eb–Et 5 – Et 4 greater than 90 ° (fig. 25B, D).................. 2

2. Carapace, anterior margin with weak median projection (epistome) (fig. 14C, 15A, C, D); pedipalp chela, movable finger (♂) distinctly curved (fig. 26B, C)................ 3

– Carapace, anterior margin sublinear or emarginate, with shallow median notch (figs. 14A, B, D, 15B, 16); pedipalp chela, movable finger (♂) straight (figs. 25B, D, 31C)... 6

3. Metasomal segment V (♀) slightly elongated, length greater than or equal to twice its width (fig. 22C); metasomal segment I with two pairs of VSM macrosetae (fig. 19A, C, F); pedipalp chela, movable finger (♂) strongly curved (figs. 26C, 43C, 51A)......... 4

– Metasomal segment V (♀), length less than twice its width (fig. 22B); metasomal segment I with three pairs of VSM macrosetae (fig. 19B); pedipalp chela, movable finger (♂) slightly curved (fig. 26B)... O. paessleri

4. Carapace, tergites, metasomal segments, ventral surface unpigmented (fig. 49); sternite VII finely granular (fig. 19F); metasomal segments I–IV, VSM carinae present, at least on segments I and II (fig. 19F); hemispermatophore, frontal crest shorter than apex length, ventral border of distal part of apex straight (fig. 47C, D)....... O. tamarugal

– Carapace, tergites, metasomal segments, ventral surface pigmented (figs. 11B, 13E); sternite VII smooth or nearly so (fig. 19A, C); metasomal segments I–IV, VSM carinae absent (fig. 19A, C); hemispermatophore, frontal crest slightly elongated, length greater than or equal to apex length, ventral border of distal part of apex slightly curved (figs. 28B, D, 38D, E)........................ 5

5. Carapace, tergites, metasomal segments, and pedipalps markedly pigmented (figs. 11B, 12C, 13E); telson vesicle, ventral surface (♂) granular in anterior third; pedipalp chela, trichobothrium Esb situated between trichobothria Eb 2 and Eb 3; hemispermatophore, distal crest without folds (fig. 28B)..... O. curvidigitus

– Carapace and tergites faintly pigmented, metasomal segments and pedipalps unpigmented (fig. 41); telson vesicle, ventral surface (♂) entirely granular (fig. 23F); pedipalp chela, trichobothrium Esb situated dorsal to trichobothrium Eb 2; hemispermatophore, distal crest with one or two small folds (fig. 40E)............. O. quewerukana

6. Hemispermatophore, frontal crest reduced, length less than apex length (figs. 27, 36F–H, K–O).......................... 7

– Hemispermatophore, frontal crest elongated, length greater than apex length (fig. 36D, E, I, J)........................... 11

7. Metasomal segments I–III, dorsal surfaces each with two median subtriangular spots (occasionally absent on I), usually separated medially by narrow unpigmented line (fig. 12A, C); segment IV with three pairs of VSM macrosetae.................. 8

– Metasomal segments I–III, dorsal surfaces each without median spots, but with reticulate pigmentation along DL carinae (fig. 12B, 13C); segment IV with four or five pairs of VSM macrosetae (fig. 17A).......... 10

8. Carapace, anterior margin with shallow median notch (fig. 14B); metasoma (♂), VL and VSM carinae obsolete, granular on segment I, absent on II (fig. 18F); hemispermatophore apex 52 % –54 % of lamina length, terminal process of basal lobe well developed (figs. 32C, D, 36A–C).... O. compagnuccii

– Carapace, anterior margin with deep median notch (fig. 14A); metasoma (♂), VL and VSM carinae well developed, granular, occupying entire length of segment I and weakly developed but complete on II; hemispermatophore apex 66 % –72 % of lamina length, terminal process of basal lobe small (fig. 32A, B, 36F–H, K–O).................. 9

9. Metasomal segment IV with two or three pairs of ML macrosetae; segment III usually with one pair of DL macrosetae... O. calchaqui

– Metasomal segment IV with one pair of ML macrosetae; segment III usually without DL macrosetae............... O. famatina

10. Pedipalp chela manus (♂), internal surface with apophysis (fig. 8B); pedipalp chela fixed finger (♂) slightly curved, creating small gap with movable finger when fingers closed (fig. 22A); metasomal segment V, VL and VM carinae complete (fig. 22E); metasomal segments with distinct VM pigmentation stripe (at least on segments II–V); hemispermatophore, ventral border of apex slightly curved (fig. 27B)............ O. parvus

– Pedipalp chela manus (♂), internal surface without apophysis (fig. 25C); pedipalp chela fixed finger (♂) straight, no gap evident when fingers closed (fig. 25B); metasomal segment V, VL and VM carinae absent (♂; fig. 21C) or restricted to distal third (♀; fig. 22F); metasomal segments irregularly pigmented, VM pigmentation stripe indistinct (fig. 13D); hemispermatophore, ventral border of apex straight (fig. 27C)........... O. wawita

11. Metasoma segments I–III (♀), VSM carinae present (fig. 19D); segment V, VL and VM carinae restricted to posterior two-thirds (fig. 21F); pedipalp chela manus, trichobothrium Esb situated between Eb 2 and Eb 3, Db slightly closer to Dt than to Eb 3 (fig. 39C); hemispermatophore, distal border of apex slightly rounded, frontal crest with internal lateral projection vestigial (fig. 40A–C).......................... O. huascaran

– Metasoma segments I–III (♀), VSM carinae absent; metasomal segment V, VL, and VM carinae complete (fig. 20A, C, F); pedipalp chela manus, trichobothrium Esb situated dorsal to Eb 2, Db equidistant between Dt and Eb 3 (figs. 25D, 46B, C); hemispermatophore, distal border of apex subtriangular, frontal crest with internal lateral projection complete (figs. 28A, 47A, B)......... 12

12. Sternite VII acarinate (fig. 18A); metasomal segment II (♂), VSM carinae absent (fig. 18A); segment V, VSM and VM carinae not discernible from dense surface granulation (fig. 21A); legs III and IV, telotarsi each with 3/4 spiniform macrosetae in pro- and retroventral rows; metasomal segments I–III, paired VL stripes contiguous with VM stripe posteriorly (but not on segments IV and V) (fig. 11D); segment IV with four pairs of VSM macrosetae........... O. atiquipa

– Sternite VII with one or two pairs of carinae (fig. 18C, D); metasomal segment II (♂), VSM carinae present; segment V, VM, and VL carinae well defined (figs. 20A, C, F, 21E); legs III and IV, telotarsi each with 3/3 spiniform macrosetae in pro- and retroventral rows; metasomal segments I–V, paired VL stripes not contiguous with VM stripe posteriorly (fig. 11C); segment IV with three pairs of VSM macrosetae....................... 13

13. Hemispermatophore apex elongated, angle of inclination 135.18 ° –139.1 ° (fig. 36D, E); tergite VII entirely pigmented (fig. 13G); telson vesicle (♂), dorsal surface concave (fig. 23E)............................... O. grismadoi

– Hemispermatophore apex short, angle of inclination 138.99 ° –144.99 ° (figs. 36I, J, 47A, B); tergite VII with paired lateral spots of pigmentation delimiting unpigmented median longitudinal stripe (fig. 13F); telson vesicle (♂), dorsal surface flat (fig. 23A)....... 14

14. Hemispermatophore, distal crest extremely developed, extending almost entire length of lamina (fig. 47A, B); telson length/width ratio (♂), 2.65–2.94 (mean 5 2.78), (♀), 2.13–2.37 (mean 5 2.27)............. O. ramirezi

– Hemispermatophore, distal crest restricted to distal half of lamina (fig. 36I); telson length/ width ratio (♂), 2.87–3.21 (mean 5 3.07), (♀), 2.44–2.55 (mean 5 2.49)... O. alticola