Reptilia, Leptotyphlopidae, Leptotyphlops salgueiroi Amaral, 1954: distribution extension and geographic variation

Costa, Henrique Caldeira; Pinto, Roberto Richard; Santana, Diego José

doi:10.15560/5.4.783

Cited by 8 publications

(9 citation statements)

References 1 publication

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“…Although females exhibited more thoracolumbar vertebrae than males, no statistic sexual dimorphism was detected (F (1,20) 5 2.3, P 5 0.14). Previous studies (Passos et al, 2005(Passos et al, , 2006Costa et al, 2009) reported sexual dimorphism in the number of middorsal and caudal scales in Trilepida salgueiroi. Because there is a correlation in number of caudal vertebrae and scales in scolecophidians (usually as 1:1 scale/vertebra; see Gans and Taub, 1965;Alexander and Gans, 1966), one would expect that sexual dimorphism should also be reflected in the vertebrae in T. salgueiroi.…”

Section: Vertebrae and Ribsmentioning

confidence: 89%

“…Anatomical terminology follows Romer (), List (), and Holman () [atlas and axis], List () [pelvic girdle], Holman () [trunk and tail vertebrae], Hardaway and Williams () and Persky et al () [costal cartilages], Langebartel () [hyoid elements], Rieppel () [parabasisphenoid complex], Wallach () [larynx and tracheal cartilages], Kley () [suspensorium], Rieppel et al () [skull], Curcio () and Rieppel et al () [skull foramina]. We follow Passos et al (), and Costa et al () in considering specimens up to 250 mm of total length to be juveniles. We tested assumptions of sexual dimorphism for number of vertebrae with the aid of the software Statistic 7.0 for Windows (Statsoft, ).…”

Section: Methodsmentioning

confidence: 99%

“…Anatomical terminology follows Romer (1956), List (1966), and Holman (2000) [atlas and axis], List (1966) [pelvic girdle], Holman (2000) [trunk and tail vertebrae], Hardaway and Williams (1976) and Persky et al (1976) [costal cartilages], Langebartel (1968) [hyoid elements], Rieppel (1979a) [parabasisphenoid complex], Wallach (1998a) [larynx and tracheal cartilages], Kley (2006) [suspensorium], Rieppel et al (2009) [skull], Curcio (2003) and Rieppel et al (2009) [skull foramina]. We follow Passos et al (2005Passos et al ( , 2006, and Costa et al (2009) in considering specimens up to 250 mm of total length to an,angular;at,atlas;bo,basioccipital;cb,compound bone;co,coronoid;d,dentary;f,frontal;m,maxilla;n,nasal;on,optic nerve foramen;otc,otooccipitals;p,parietal;pal,palatine;pbs,parabasisphenoid;pf,prefrontal;pm,…”

Section: Methodsmentioning

confidence: 99%

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Osteology and Cartilaginous Elements ofTrilepida salgueiroi(Amaral, 1954) (Scolecophidia: Leptotyphlopidae)

Pinto

Martins²,

Curcio

et al. 2015

The Anatomical Record

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Morphological and anatomical studies on the Leptotyphlopidae have increased in the past 10 years, providing important data on the systematics of this group, mainly focused on the skull and lower jaw morphology. However, most studies are based on a single specimen, rarely combining more than one single method of assessing morphological information. Therefore, several data on postcranial morphology, sexual dimorphism, and ontogenetic and intraspecific variation of leptotyphlopids remain poorly understood. Herein, we provide a detailed description of the cranial and postcranial skeleton of Trilepida salgueiroi based on more than 20 specimens (including males, females and juveniles), as well as a description of osteology and cartilaginous elements through the use of combined methodologies such as X-ray scanning, high resolution CT-scanning, and clearing and staining of articulated and disarticulated specimens. We also provide data on the presence/absence of dimorphic and intraspecific variation of the observed characters. The presence of a statolithic mass in the cavum vestibuli differs from the pattern found in other scolecophidians. A correlation of dorsal vertebrae with ventral and subcaudal scales was found (1:1), as well as total number of vertebrae with middorsal scales (1:1), thoracolumbar vertebrae and ventral scales (1:1), and a higher number of caudal vertebra with subcaudal scales (1.23:1). Intraspecific variation was found in several elements of the skull, lower jaw, pelvic girdle and vertebral number, but no evidence of sexual dimorphism was found in any of the species characters analysed. The homologies of several elements are discussed, although still remaining poorly understood and unknown. Anat

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Section: Vertebrae and Ribsmentioning

confidence: 89%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Osteology and Cartilaginous Elements ofTrilepida salgueiroi(Amaral, 1954) (Scolecophidia: Leptotyphlopidae)

Pinto

Martins²,

Curcio

et al. 2015

The Anatomical Record

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show abstract

“…There is overlap in morphological characters of T. koppesi and T. salgueiroi, but the latter species attain higher dorsal and ventral scales counts (Pinto & Fernandes 2012 (Pinto & Fernandes 2012). Differences in scale counts between the two specimens are due to sexual dimorphism known from T. salgueiroi (Costa et al 2009).…”

mentioning

confidence: 88%

“…Trilepida is composed of 14 species, seven occurring in the Brazilian territory, most of them endemic of that country (Passos et al 2005, 2006, Costa et al 2009, Pinto & Curcio 2011, Pinto & Fernandes 2012, Costa & Bérnils 2015. Trilepida jani Pinto & Fernandes 2012 is one of the newest described species in the genus and up to now is known only from a few localities in southern Espinhaço, a 1,000 km-long mountain range extending from the center of Minas Gerais to the north of Bahia states (Silva et al 2008).…”

mentioning

confidence: 99%