Claudius angustatus

Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Cladus: Archelosauria
Division: Pan-Testudines
Division: Testudinata
Ordo: Testudines
Subordo: Cryptodira

Superfamilia: Chelydroidea
Familia: Kinosternidae
Subfamilia: Staurotypinae
Genus: Claudius
Species: Claudius angustatus
Name

Claudius angustatus Cope 1865:187
Holotype: USNM 6518; according to Iverson (1986:132), parts of the same specimen originally were catalogued as both USNM 6518 and 6525 (after King & Burke 1989).
Type locality: "Tabasco, Mexico".

Synonymy

Claudius angustatus Cope 1865:187
Claudius megalocephalus Bocourt 1868
Claudius angustatus Günther 1885:12
Claudius angustatus Boulenger 1889
Claudius angustatus Liner 1994:31
Claudius angustatus Köhler 2000:25
Claudius angustatus TTWG 2010
Claudius angustatus TTWG 2017

References

Cope, E.D. 1866. Third contribution to the herpetology of tropical America. Proc. Acad. Nat. Sci. Philadelphia 17 [1865]: 185-198
Turtle Taxonomy Working Group (Rhodin, A.G.J., Iverson, J.B., Bour, R., Fritz, U., Georges, A., Shaffer, H.B. & van Dijk, P.P.). 2017. Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (8th Ed.). Chelonian Research Monographs 7: 1–292. ISBN 978-1-5323-5026-9. DOI: 10.3854/crm.7.checklist.atlas.v8.2017. Paywall. Full article (PDF). Reference page.

Vernacular names
čeština: Klapavec zubatý
English: Narrow-bridged musk turtle

The narrow-bridged musk turtle (Claudius angustatus) is a species of turtle in the family Kinosternidae. The species is found in Central America and Mexico.

Geographic range

C. angustatus is found in Mexico, Guatemala, and Belize.[1]
Taxonomy

As of 2010, C. angustatus is the only recognized extant species in the genus Claudius.[1]
Description

The narrow-bridged musk turtle is typically brown in color. The scutes of the carapace have lines and graining, imparting an almost wood-like appearance. It often has bright-yellow markings on the edges of the carapace. As it ages, algae often heavily cover the shell, masking the patterning and coloration. The head is large and bulbous for its size, with a sharp beak and a long neck. The carapace is domed, with three distinct ridges down the length. Though classified in the subfamily Staurotypinae with the "giant" musk turtles, the narrow-bridged musk turtle generally only grows to a straight carapace length of about 6.5 in (16.5 cm).[citation needed]

The narrow-bridged musk turtle exhibits genetic sex determination, in contrast to most turtles; although the mechanism is not known for certain, it is suspected to be XX/XY like that of its relative Staurotypus.[3][4]
Behavior, habitat, and diet

Like all musk turtles, the narrow-bridged musk turtle is almost entirely aquatic, and prefers habitats such as slow-moving creeks, or shallow ponds that are heavily vegetated. It spends much of its time walking along the bottom, foraging for aquatic insects and other invertebrates, and carrion. It has glands under the rear of the shell from which it can release a foul-smelling musk, hence its common name.[citation needed]
References

Rhodin, Anders G.J.; van Dijk, Peter Paul; Iverson, John B.; Shaffer, H. Bradley (2010-12-14). "Turtles of the world, 2010 update: Annotated checklist of taxonomy, synonymy, distribution and conservation status" (PDF). Chelonian Research Monographs. 5: 000.85–000.164. doi:10.3854/crm.5.000.checklist.v3.2010. ISBN 978-0965354097. Archived from the original (PDF) on 2010-12-15.
Fritz Uwe; Havaš, Peter (2007). "Checklist of Chelonians of the World" (PDF). Vertebrate Zoology. 57 (2): 249–250. ISSN 1864-5755. Archived from the original (PDF) on 2010-12-17. Retrieved 29 May 2012.
Badenhorst, Daleen; Stanyon, Roscoe; Engstrom, Tag; Valenzuela, Nicole (2013-04-01). "A ZZ/ZW microchromosome system in the spiny softshell turtle, Apalone spinifera, reveals an intriguing sex chromosome conservation in Trionychidae". Chromosome Research. 21 (2): 137–147. doi:10.1007/s10577-013-9343-2. ISSN 1573-6849. PMID 23512312. S2CID 14434440.
Kawagoshi, Taiki; Uno, Yoshinobu; Nishida, Chizuko; Matsuda, Yoichi (2014-08-14). "The Staurotypus Turtles and Aves Share the Same Origin of Sex Chromosomes but Evolved Different Types of Heterogametic Sex Determination". PLOS ONE. 9 (8): e105315. Bibcode:2014PLoSO...9j5315K. doi:10.1371/journal.pone.0105315. ISSN 1932-6203. PMC 4133349. PMID 25121779.