Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk).
Latest update: December 31st, 2022.
 
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Genus
Rena
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Maroon Thread Snakes
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Kastanienbraune Fadenschlangen
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Rødbrune Trådslanger
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1853 |  |
Rena Girard in Baird & Girard (type species: Rena humilis Baird & Girard 1853) |
Contents:
11 species, of which 7 (63.6%) are endemic.
Endemism: 0%  100%
Remarks:
Previously regarded as a synonym of
Leptotyphlops.
Revalidated as a separate genus by Adalsteinsson, Branch, Trape, Vitt & Hedges (2009).
Previously included four other species, now assigned to the genera
Siagonodon (unguirostris), and
Trilepida (affinis, dimidiata, nicefori).
Distribution:
North America.
Reported from:
Mexico
(Baja California Norte
[incl.
Isla Cedros],
Baja California Sur
[incl.
Isla Carmen,
Isla Cerralvo,
Isla Santa Catalina],
Chihuahua,
Coahuila,
Colima,
Distrito Federal,
Durango,
Guerrero,
Hidalgo,
Jalisco,
Mexico State,
Michoacan,
Morelos,
Nayarit,
Nuevo Leon,
Oaxaca,
Puebla,
Queretaro,
San Luis Potosi,
Sinaloa,
Sonora,
Tamaulipas,
Veracruz),
USA
(Arizona,
California,
Colorado,
Kansas,
Nevada,
New Mexico,
Oklahoma,
Texas,
Utah).
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Rena boettgeri
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Cerralvo Island Thread Snake
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Cerralvo-Fadenschlange
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Cerralvo-trådslange
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1899 | |
Glauconia boettgeri Werner |
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Leptotyphlops humilis boettgeri Smith & Larsen 1974 |
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Rena boettgeri Adalsteinsson, Branch, Trape, Vitt & Hedges 2009 |
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1931 | |
Leptotyphlops humilis slevini Klauber (Hahn 1980) |
Remarks:
Previously regarded as a subspecies of humilis (e.g., Hahn 1980).
Revalidated as a separate species by Adalsteinsson, Branch, Trape, Vitt & Hedges (2009), subsequently followed by most authors, although some still treat it as a synonym of humilis
(e.g., Wallach, Williams & Boundy 2014).
Distribution:
Mexico
(Baja California Sur
[incl.
Isla Cerralvo]).
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Rena bressoni
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Michoacan Thread Snake, Michoacan Slender Thread Snake
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Michoacan-Fadenschlange
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Michoacan-trådslange
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1939 | |
Leptotyphlops bressoni Taylor |
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Rena bressoni Adalsteinsson, Branch, Trape, Vitt & Hedges 2009 |
Distribution:
Mexico
(Jalisco,
Michoacan).
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Rena dugesii
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Mexican Thread Snake, (Duges' Thread Snake)
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Mexicanische Fadenschlange
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Mexicansk Trådslange
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1881 | |
Catodon dugesii Bocourt |
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Siagonodon dugesii Bocourt 1882 |
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Rena dugesii Cope 1887 |
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Leptotyphlops dugesii Taylor 1940 |
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Leptotyphlops humilis dugesi Klauber 1940 |
Remarks:
Previously regarded as a subspecies or synonym of humilis (e.g., Hahn 1980; Adalsteinsson, Branch, Trape, Vitt & Hedges 2009 [by implication]).
Regarded herein as separate species, following several recent works
(e.g., Lemos-Espinal, Smith, Chiszar & Woolrich-Piña 2004; Lemos-Espinal & Smith 2007; Liner 2007; Wallach, Williams & Boundy 2014).
Not listed for Jalisco by Cruz-Sáenz, Muñoz-Nolasco, Mata-Silva, Johnson, García-Padilla & Wilson (2017).
Not listed for Sonora by Lemos-Espinal, Smith & Rorabaugh (2019).
Distribution:
Mexico
(Chihuahua,
Colima,
Jalisco,
Michoacan,
Nayarit
[incl.
Islas Marias],
Sinaloa,
Sonora).
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Rena dulcis
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Texas Thread Snake
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Texas-Fadenschlange
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Texas-trådslange
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1853 | |
Rena dulcis Baird & Girard |
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Stenostoma dulce Cope 1861 |
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Leptotyphlops dulcis Stejneger 1891 |
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Glauconia dulcis Cope 1892 |
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1884 | |
Stenostoma myopicum Garman "1883" (Flores-Villela, Smith, Canseco-Márquez & Campbell 2022) |
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Glauconia myopica Boulenger 1893 |
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Leptotyphlops myopica Barbour & Loveridge 1929 |
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Leptotyphlops dulcis myopicus Klauber 1940 |
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Rena myopica Adalsteinsson, Branch, Trape, Vitt & Hedges 2009 |
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1884 | |
Stenostoma rubellum Garman "1883" (Hahn 1980) |
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Leptotyphlops dulcis rubellum Dixon & Vaghhan 2003 |
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Rena dulcis rubella Adalsteinsson, Branch, Trape, Vitt & Hedges 2009 |
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1884 | |
Stenostoma tenuiculum Garman "1883" (Flores-Villela, Smith, Canseco-Márquez & Campbell 2022) |
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Rena tenuicula Cope 1887 |
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Leptotyphlops humilis tenuiculus Klauber 1940 |
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1896 | |
Glauconia dissecta Cope (Flores-Villela, Smith, Canseco-Márquez & Campbell 2022) |
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Leptotyphlops dulcis dissectus Klauber 1940 |
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Leptotyphlops myopicus dissectus Smith & Sanders 1952 |
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Leptotyphlops dissectus Dixon & Vaughhan 2003 |
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Rena dissecta Adalsteinsson, Branch, Trape, Vitt & Hedges 2009 |
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1985 | |
Leptotyphlops dulcis supraocularis Tanner |
Other common names:
dissecta: New Mexico Thread Snake, Split-lipped Thread Snake
dulcis: Plains Thread Snake
myopica: Tampico Thread Snake
rubella: South Texas Thread Snake
supraocularis: Tanner's Thread Snake
tenuiculus: San Luis Potosi Thread Snake
Remarks:
Previously included iversoni.
Dixon & Vaugham (2003) revalidated myopica as a separate species, however, the taxon was returned to the synonymy of dulcis by
Flores-Villela, Smith, Canseco-Márquez & Campbell (2022).
Lemos-Espinal & Dixon (2013) regarded tenuiculum as a synonym of segrega, and transferred it from the synonymy of humilis.
Hahn (1980) reported tenuiculum from both San Luis Potosi and Tamaulipas, however, it is known only from the type specimen, which came from San Luis Potosi (Lemos-Espinal & Dixon 2013).
Introduced to:
USA
(Florida).
Distribution:
Mexico
(Chihuahua,
Coahuila,
Distrito Federal,
Hidalgo,
Nuevo Leon,
Puebla,
Queretaro,
San Luis Potosi,
Tamaulipas,
Veracruz),
USA
Arizona,
Colorado,
Kansas,
New Mexico,
Oklahoma,
Texas).
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Rena humilis
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Western Thread Snake
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Westamerikanische Fadenschlange
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Vestamerikansk Trådslange
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1853 | |
Rena humilis Baird & Girard |
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Stenostoma humile Peters 1857 |
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Glauconia humilis Boulenger 1893 |
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Siagonodon humilis van Denburgh 1897 |
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Leptotyphlops humilis Ruthven 1907 |
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1931 | |
Leptotyphlops humilis cahuilae Klauber |
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1938 | |
Leptotyphlops humilis utahensis Tanner |
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1975 | |
Leptotyphlops humilis levitoni Murphy |
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1975 | |
Leptotyphlops humilis lindsayi Murphy |
Other common names:
cahuilae: Desert Thread Snake
humilis: Southwestern Thread Snake
levitoni: Santa Catalina Island Thread Snake
lindsayi: Carmen Island Thread Snake
utahensis: Utah Thread Snake
Remarks:
Previously included boettgeri, dugesii and segrega.
Distribution:
Mexico
(Baja California Norte
[incl.
Isla Cedros],
Baja California Sur
[incl.
Isla Carmen,
Isla Santa Catalina],
Sonora),
USA
(Arizona,
California,
Nevada,
Utah).
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Rena iversoni
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Tamaulipan Thread Snake
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Tamaulipas-Fadenschlange
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Tamaulipas-trådslange
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1998 | |
Leptotyphlops dulcis iversoni Smith, van Breukelen, Auth & Chiszar |
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Leptotyphlops myopicus iversoni Liner 2007 |
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Rena myopica iversoni Adalsteinsson, Branch, Trape, Vitt & Hedges 2009 |
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Rena iversoni Wallach, Williams & Boundy 2014 |
Remarks:
Wallach, Williams & Boundy (2014), followed by Terán-Juárez, García-Padilla, Mata-Silva, Johnson & Wilson (2016), regarded iversoni as a separate species, based on Pinto (2010), however, the former authors omitted this reference in their literature list, as did the latter authors.
Distribution:
Mexico
(Tamaulipas).
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Rena klauberi
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Jalisco Thread Snake
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Jalisco-Fadenschlange
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Jalisco-trådslange
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2022 | |
Rena klauberi Flores-Villela, Smith, Canseco-Márquez & Campbell |
Distribution:
Mexico
(Jalisco).
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Rena maxima
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Giant Thread Snake, Guerreran Thread Snake
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Riesen-Fadenschlange
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Kæmpe-trådslange
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1932 | |
Leptotyphlops maximus Loveridge |
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Rena maxima Adalsteinsson, Branch, Trape, Vitt & Hedges 2009 |
Distribution:
Mexico
(Guerrero,
Mexico State,
Michoacan,
Morelos,
Oaxaca,
Puebla).
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Rena segrega
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Trans-Pecos Thread Snake
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Trans-Pecos-Fadenschlange
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Trans-Pecos-trådslange
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1939 | |
Leptotyphlops humilis segregus Klauber |
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Leptotyphlops segregus Lemos-Espinal & Smith 2007 |
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Rena humilis segregus Adalsteinsson, Branch, Trape, Vitt & Hedges 2009 |
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Rena segrega Lemos-Espinal & Dixon 2013 |
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1985 | |
Leptotyphlops humilis chihuahuaensis Tanner (Lemos Espinal & Smith 2007) |
Other common names:
chihuahuaensis: Chihuahuan Thread Snake
Remarks:
Regarded as a subspecies of humilis by some authors (e.g., Adalsteinsson, Branch, Trape, Vitt & Hedges 2009 [by implication]), but as a separate species herein,
following Lemos-Espinal, Smith, Chiszar & Woolrich-Piña (2004) and others.
Lemos-Espinal & Dixon (2013) regarded tenuiculum as a synonym of segrega, and transferred it from the synonymy of humilis.
Being an older name than segrega, this would require a name change for this species, however, since the name segrega has appeared in many publications since its description in 1939,
it is retained herein for the sake of taxonomic stability.
Hahn (1980) reported tenuiculum from both San Luis Potosi and Tamaulipas, however, it is known only from the type specimen, which came from San Luis Potosi (Lemos-Espinal & Dixon 2013).
Distribution:
Mexico
(Chihuahua,
Coahuila,
Durango,
Nuevo Leon,
San Luis Potosi),
USA
(Arizona,
New Mexico,
Texas).
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