Cloacal anatomy and sex determination in Tiliqua sp.

Spadola, Filippo; Sgroi, Paola; Lubian, Emanuele; Morici, Manuel

doi:10.33256/hb156.1113

Cited by 3 publications

(3 citation statements)

References 16 publications

(16 reference statements)

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“…The existence of similar structures has been described in tegu lizards (Morici et al 2017;Spadola et al 2022), male Tiliqua sp. (Spadola et al 2021) and has been recently confirmed also in another monomorphic genus, the helodermatid lizards (our unpublished results).…”

Section: Discussionsupporting

confidence: 78%

“…Recently, cloacal anatomy and sex identification with the use of cloacoscopy have been published for another monomorphic lizard, Tiliqua sp. (Spadola et al 2021).…”

Section: Figurementioning

confidence: 99%

“…Sex identification in monomorphic lizard species is challenging. Detailed knowledge of reptile cloacal anatomy is necessary for sex determination and breeding programs ex-situ for endangered reptile species (Fox 1977;Trauth et al 1987;O'Malley 2005;Oliveri et al 2016;Oliveri et al 2018;Spadola et al 2021;Spadola et al 2022). Hemipenal pouches probing or hemipenes eversion have been described in snakes and lizards as feasible methods for sexing (Stahl and DeNardo 2019), however, misinterpretations are common in varanids, helodermatids, and skinks.…”

mentioning

confidence: 99%

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Sex identification in Australian skinks (Egernia stokesii, E. hosmeri, E. striolata) using cloacoscopy

Knotek¹,

Oliveri²,

Čermáková³

et al. 2023

Vet. Med. - Czech

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Thirteen adult healthy captive skinks, six Gidgee spiny-tailed skinks (Egernia stokesii), three Hosmer's spiny-tailed skinks (Egernia hosmeri) and four tree crevice-skinks (Egernia striolata), were submitted to the study. The weight of the animals ranged from 28 g to 146 g. All skinks were explored during their putative mating season, which is December. Lizards were restrained manually and positioned in ventral recumbence. Cloacoscopy was performed with the rigid endoscope, protecting channel, endocamera and recording system Telepack-Pal (Karl Storz Endoskope, Tuttlingen, Germany). While the endoscope was gently introduced into the cloaca and advanced into the coprodeum sterile saline was flushed into the cloaca through the protecting channel. The endoscope was then slowly withdrawn to allow visualization of the main structures of the urodeum and proctodeum. Male skinks are characterized by the presence of urethral papillae and only one horizontal septum which divides the chamber of the urodeum into two subchambers. Female skinks are characterised by the presence of two septa. The centraldorsal fold that divides the urodeum into two pouches in female skinks is absent in males. Cloacoscopy proved an effective method of sex identification and can be considered a valuable method for breeding and conservation in monomorphic skink lizards.

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Section: Discussionsupporting

confidence: 78%

“…Recently, cloacal anatomy and sex identification with the use of cloacoscopy have been published for another monomorphic lizard, Tiliqua sp. (Spadola et al 2021).…”

Section: Figurementioning

confidence: 99%

mentioning

confidence: 99%

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Sex identification in Australian skinks (Egernia stokesii, E. hosmeri, E. striolata) using cloacoscopy

Knotek¹,

Oliveri²,

Čermáková³

et al. 2023

Vet. Med. - Czech

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Cloacal microanatomy of tropical male butterfly lizards (genus Leiolepis) during the annual reproductive cycle

Pewhom,

Srakaew

2024

Zoologischer Anzeiger

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Endoscopic techniques for early diagnosis of cloacal pathologies and sex determination in blue spotted tree monitor ( Varanus macraei) and Cuming’s water monitor ( Varanus cumingi)

Spadola,

Arezzo di Trifiletti,

Marino

et al. 2024

Veterinary Quarterly

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This article attempts to present, for the first time, the usefulness and feasibility of using endoscopic techniques in the cloacal region of Varanus cumingi and Varanus macraei . This method can serve both diagnostic and therapeutic purposes, as well as offering an early approach to sex determination through the observation of the urodeum which in males ends in a blind end while in females it consists of two ostia which represent the outlets of the oviducts. In this context, commonly employed sex determination techniques, such as post-cloacal spur detection, have shown unreliability. The study involved the examination of ten specimens, approximately one year old, from a private breeding farm, following a complete clinical evaluation to confirm their general state of health. All subjects underwent sedation, which allowed the evaluation of anatomical structures, the health status of the cloaca and the determination of sex. This study and its findings may provide a critical basis for addressing population declines of these species, particularly for V. macraei, which has already been classified as ‘endangered’ by the IUCN.

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Cloacal anatomy and sex determination in Tiliqua sp.

Cited by 3 publications

References 16 publications

Sex identification in Australian skinks (Egernia stokesii, E. hosmeri, E. striolata) using cloacoscopy

Sex identification in Australian skinks (Egernia stokesii, E. hosmeri, E. striolata) using cloacoscopy

Cloacal microanatomy of tropical male butterfly lizards (genus Leiolepis) during the annual reproductive cycle

Endoscopic techniques for early diagnosis of cloacal pathologies and sex determination in blue spotted tree monitor ( Varanus macraei) and Cuming’s water monitor ( Varanus cumingi)

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