Cyrtognatha

Dimitrov, Dimitar & Hormiga, Gustavo, 2009, Revision And Cladistic Analysis Of The Orbweaving Spider Genus Cyrtognatha Keyserling, 1881 (Araneae, Tetragnathidae), Bulletin of the American Museum of Natural History 2009 (317), pp. 1-140 : 29-30

CYRTOGNATHA (FEMALES)

1. Caudal tubercle of the abdomen well developed (higher than one-third of the height of the caudal fraction of the abdomen) (fig. 30D).......................... 2

– Caudal tubercle of the abdomen very small or absent (fig. 46F).................. 6

2. Internal female genitalia with two membranous sacs (fig. 31E)................ 3

– Internal female genitalia with one membranous sacs (fig. 37B)................ 4

3. Membranous chamber of the uterus externus larger or very similar in size to the median sac (fig. 25D–E); median sac proximally elongat- ed with nearly cylindrical shape.......................... C. pachygnathoides

– Membranous chamber of the uterus externus smaller than the median sac (fig. 31D–E); median sac rounded........ C. espanola

4. Membranous chamber connecting the uterus externus and posterior sacs conspicuously widened and with a chitinized section that has a triangular shape in dorsal view (figs. 20D, E, 21E).... C. paradoxa , n. sp.

– Membranous chamber connecting the uterus externus and the posterior sac not widened and without chitinized section........ 5

5. Membranous chamber connecting the uterus externus and the posterior sac almost straight (fig. 11E)............ C. quichua , n. sp.

– Membranous chamber connecting the uterus externus and the posterior sac with a pronounced U curvature (fig. 52D).. C. bryantae

6. Internal female genitalia with one membranous sacs (fig. 37B)................ 7

– Internal female genitalia with two membranous sacs (fig. 31E)................ 11

7. Membranous chamber connecting uterus externus and posterior sac not widened.. 8

– Membranous chamber connecting uterus externus and posterior sac widened..... 9

8. Membranous chamber connecting uterus externus and posterior sac with a pronounced U curvature (fig. 22D)... C. orphana , n. sp.

– Membranous chamber connecting uterus externus and posterior sac almost straight (fig. 37D)................. C. insolita

9. Membranous fold of abdominal cuticle forming the secondary genital opening about twice as wide than the width of the posterior sac (fig. 24A, B)..................... 10

– Membranous fold of abdominal cuticle forming the secondary genital opening might be wider than the width of the posterior sac, but it does not exceed its width by more than 1.5 times (fig. 18D, E)....... C. petila , n. sp.

10. Copulatory ducts clearly widened distally (fig. 59B).................. C. lepida

– Copulatory ducts cylindrical (fig. 24B) and not widened or just slightly widened distally................. C. pathetica , n. sp.

11. Posterior sac larger than the median sac (fig. 48B, D)................ C. simoni

– Posterior and median sacs of similar size.. .............................. 12

12. Membranous fold of abdominal cuticle forming the secondary genital opening about twice as wide than the width of the posterior sac (fig. 60E); St. Vincent........ C. serrata

– Width of the membranous fold of abdominal cuticle forming the secondary genital opening smaller than the width of the posterior sac (fig. 41G); Hispaniola......... C. rucilla