Medionops Sánchez-Ruiz & Brescovit, 2017

Martínez, Leonel, Sánchez-Ruiz, Alexander & Bonaldo, Alexandre B., 2021, The spider genus Medionops Sánchez-Ruiz & Brescovit (Araneae: Caponiidae) in Colombia, with the description of four new species, European Journal of Taxonomy 773, pp. 61-79 : 63-64

Genus Medionops Sánchez-Ruiz & Brescovit, 2017

Updated key to the species of Medionops Sánchez-Ruiz & Brescovit, 2017

1. Abdomen dorsally with remarkable pattern of gray chevrons or stains ( Figs 1A, C , 2A, C , 3A ) .... 2

– Abdomen dorsally with unremarkable pattern of very fine gray chevron lines, almost unnoticeable (Sánchez-Ruiz & Brescovit 2017: figs 17a–b, 20a) ........................................................................ 10

2. Abdomen dorsally with five pairs of irregular dark gray stains forming two longitudinal bands (Sánchez-Ruiz & Brescovit 2017: figs 18a–b, 10a) .......................................................................... 3

– Abdomen dorsally with five whitish gray chevron stripes, which decrease in size towards the posterior part of abdomen ( Figs 1A, C , 2A, C , 3A ) ......................................................................... 4

3. Dorsal irregular dark gray stains on abdomen very close to each other, almost touching (Sánchez-Ruiz & Brescovit 2017: fig. 18a–b); crista very short; body more than 5 mm total length .................................................................................................... M. simla (Chickering, 1967)

– Dorsal irregular dark gray stains on abdomen widely separated from each other, not touching (Sánchez-Ruiz & Brescovit 2017: fig. 10a); crista absent (Sánchez-Ruiz & Brescovit 2017: fig. 9k); body less than 3 mm total length .............................. M. claudiae Sánchez-Ruiz & Brescovit, 2017

4. Gladius absent (Sánchez-Ruiz & Brescovit 2017: figs 11c–d, F, 13b–c) ........................................... ....................................................................................... M. murici Sánchez-Ruiz & Brescovit, 2017

– Gladius present (Dupérré 2014: fig.4; Sánchez-Ruiz & Brescovit 2017: figs 3g, 9k, 15e) .............. 5

5. Crista short but noticeable (Sánchez-Ruiz & Brescovit 2017: fig. 3g, j), reaching at least ¼ or 1 / of 5 metatarsal length ............................................................................................................................... 6

– Crista unnoticeable (Sánchez-Ruiz & Brescovit 2017: fig. 15e–f), only 1 / or less of metatarsal 6 length, or absent ................................................................................................................................ 7

6. Males embolus tip with several blade–shaped projections (Sánchez-Ruiz & Brescovit 2017: fig. 2j– l); female posterior plate with internally projected median septum (Sánchez-Ruiz & Brescovit 2017: fig. 4j–l) ......................................................................... M. blades Sánchez-Ruiz & Brescovit, 2017

– Males with smooth embolus tip, without projections (Sánchez-Ruiz & Brescovit 2017: fig. 7d–e); female posterior plate without internally projected median septum (Sánchez-Ruiz & Brescovit 2017: fig. 7g –i) .................................................................................................... M. cesari (Dupérré, 2014)

7. Abdomen dorsally with pattern of five large, wide whitish gray chevrons, which reach the lateral whitish gray spots ( Figs 2A, C , 3A ), ventrally with a pair of longitudinal stripes occupying only the posterior third of the abdomen ( Figs 2B, D , 3B ); males with bulb greater than patella length ( Fig. 2E–F ) ........................................................................................................................................ 8

– Abdomen dorsally with pattern of five small, narrow whitish gray chevrons, that never reach the lateral whitish gray spots ( Figs 4A, C , 5A ), ventrally without a pair of longitudinal stripes ( Figs 4B, D , 5B ); males with bulb equal to or smaller than the patella length ( Fig. 4E–F ) ............................. 9

8. Embolus slightly curved anteriorly, tip with accentuated curvature ( Fig. 2E–F ) ............................... ...................................................................................................... M. carolinae sp. nov. (only males)

– Embolus strongly angled at base and slightly sinuous ( Figs 3C–D , 7C ), tip almost straight ( Fig. 3C– D ) ....................................................................................................... M. cauca sp. nov. (only males)

9. Embolus more than 3 × the maximum tegular width, tip pointed ( Fig. 4E–F ) ................................... .................................................................................................... M. luiscarlosi sp. nov. (only males)

– Embolus less than 3 × the maximum tegular width, tip truncated ( Fig. 5C–D ) ................................. ..................................................................................................... M. santarosa sp. nov. (only males)

10. Crista short but noticeable, not reaching one fourth of metatarsal length; body more than 4.5 mm total length;males with embolus length more than3×the maximum diameter of the tegulum(Sánchez-Ruiz & Brescovit 2017: fig. 19g –h), known only from Venezuela M. tabay Sánchez-Ruiz & Brescovit, 2017

– Crista unnoticeable (Sánchez-Ruiz & Brescovit 2017: fig. 15d–f); body less than 3.5 mm total length; males with embolus length over less than 3 × the maximum diameter of the tegulum (Sánchez-Ruiz & Brescovit 2017: fig. 16a–b), known only from southeast coast of Brazil.......................................................................... M. ramirezi Sánchez-Ruiz & Brescovit, 2017

Figures

Fig. 1. Medionops blades Sánchez-Ruiz & Brescovit, 2017. A–B, E–F. Male, Boyacá population (IAvH-I 3381). C–D, G–H. Female, Boyacá population (IAvH-I 3382). A. Habitus, dorsal view. B. Habitus, ventral view. C. Habitus, dorsal view. D. Habitus, ventral view. E. Left palp, retrolateral view. F. Left palp, prolateral view. G. External genitalia, ventral view. H. Internal genitalia, dorsal view. Scale bars: A–D = 1.5 mm; E–F = 0.7 mm; G = 0.5 mm; H = 0.2 mm. Abbreviations: ap = anterior plate; ess = external sclerotization around spiracles; go = genital opening; re = receptaculum; ue = uterus externo.

Fig. 2. Medionops carolinae sp. nov. A–B, E–F. Holotype, ♂ (IAvH-I 3782). C–D, G–H. Paratype, ♀ (IAvH-I 3771). A. Habitus, dorsal view. B. Habitus, ventral view. C. Habitus, dorsal view. D. Habitus, ventral view. E. Left palp, retrolateral view. F. Left palp, prolateral view. G. External genitalia, ventral view. H. Internal genitalia, dorsal view. Scale bars: A–D = 1.5 mm; E–F = 0.7 mm; G = 0.5 mm; H = 0.2 mm. Abbreviations: ap = anterior plate; b = area below genital opening; ess = external sclerotization around spiracles; go = genital opening.

Fig. 3. Medionops cauca sp. nov., holotype, ♂ (IAvH-I 3788). A. Habitus, dorsal view. B. Habitus, ventral view. C. Left palp, retrolateral view. D. Left palp, prolateral view. Scale bars: A–B = 1.5 mm; C–D = 0.5 mm.

Fig. 4. Medionops luiscarlosi sp. nov. A–B, E–F. Holotype, ♂ (IAvH-I 3361). C–D, G–H. Paratype, ♀ (IAvH-I 3772). A. Habitus, dorsal view. B. Habitus, ventral view. C. Habitus, dorsal view. D. Habitus, ventral view. E. Left palp, retrolateral view. F. Left palp, prolateral view. G. External genitalia, ventral view. H. Internal genitalia, dorsal view. Scale bars: A–D = 1.5 mm; E–F = 0.7 mm; G = 0.5 mm; H = 0.2 mm.Abbreviations:p =anterior plate; b =area below genital opening; ess =external sclerotization around spiracles; go = genital opening; re = receptaculum; mc = median concavity.

Fig. 5. Medionops santarosa sp. nov., holotype, ♂ (IAvH-I 3362). A. Habitus, dorsal view. B. Habitus, ventral view. C. Left palp, retrolateral view. D. Left palp, prolateral view. Scale bars: A–B = 1.5 mm; C–D = 0.5 mm.

Fig. 7. Drawings of the male copulatory bulbs (retrolateral view) in Colombian species of Medionops Sánchez-Ruiz & Brescovit, 2017. A. M. blades Sánchez-Ruiz & Brescovit, 2017. B. M. carolinae sp. nov. C. M. cauca sp. nov. D. M. luiscarlosi sp. nov. E. M. santarosa sp. nov. Scale bars = 0.5 mm. Abbreviations: e = embolus; t = tegulum.