Early Miocene squamate assemblage from the Mokrá-Western Quarry (Czech Republic) and its palaeobiogeographical and palaeoenvironmental implications

Abstract

couverture / cover : Réalisée à partir des Figures de l'article/Made from the Figures of the article.

Amphibian and reptilian fauna from the early Miocene of Echzell, Germany

“…Each large taxonomic group is highlighted in different color. The herpetofaunistic record follows for: Wintershof West - Böhme and Ilg (2003); Ahníkov 1 (= Merkur North) -Čerňanský (2010a), Čerňanský and Bauer (2010), Čerňanský et al (2015), Klembara et al (2010), Villa and Delfino (2019a, b); Oberdorf -Čerňanský (2016), Čerňanský et al (2020b), Sanchíz (1998), Szyndlar (1998), Villa and Delfino (2019a); Petersbuch 2 - Čerňanský (2011), Ivanov (2001), Klembara et al (2010), Szyndlar and Schleich (1993), Szyndlar and Rage (2002), Szyndlar and Rage (2003), Villa and Delfino (2019a), Villa et al (2018); Echzell -present study;Mokrá-W Q 1/2001and Mokrá-W Q 2/ 2001-Ivanov (2008, Ivanov et al (2020); Dolnice - Böhme and Ilg (2003), Čerňanský (2010b), Fejfar and Roček (1986), Klembara (2015), Szyndlar (1987), Villa and Delfino (2019a); Erkertshofen 1 - Klembara et al (2010); Beon 1 - Rage and Bailon (2005); Rembach - Klembara et al (2010); Forsthart - Klembara et al (2010). The ecophysiological indices for Echzell assemblage are given for each taxon as well as the calculated precipitation values and errors are calculated according to Böhme et al (2006).…”

“…The constrictor from Echzell displays clearly diagnostic features of the genus Bavarioboa, so among others: mid-trunk vertebrae distinctly wider than long; the interzygapophyseal constriction well expressed; the neural arch moderately depressed; the neural spine approximately as high as long, occupying one half the length of the neural arch; the haemal keel prominent; the zygosphene usually roughly straight; the prezygapophyses located clearly above the floor of the neural canal; the long axis of prezygapophyseal facets oblique in dorsal view; the prezygapophyseal processes weakly developed; the paradiapophyses subsquare in shape, with indistinct subdivision into para-and diapophyseal portions (Szyndlar and Rage 2003). By their morphological characteristics and also relatively large size, the vertebrae are similar to those of the type species, Bavarioboa hermi, occurring in the German and Czech late early Miocene (Szyndlar and Schleich 1993;Szyndlar and Rage 2003;Ivanov et al 2020). However, the peculiar hourglass-shaped haemal keels observed in a few trunk vertebrae suggest affinities with Bavarioboa crocheti from the French late Oligocene.…”

Early Miocene remains of Melissiodon from Mokrá-Quarry (Moravia, Czech Republic) shed light on the evolutionary history of the rare cricetid genus

“…The Mokrá-Quarry sites are characterized by its karstic conditions, together with patches of forest and swampy areas ( Ivanov, 2008 ; Ivanov, Musil & Brzobohatý, 2006 ; Ivanov et al, 2017 ; Ivanov et al, 2020 ; Sabol et al, 2007 ; Luján et al, 2017 ; Luján et al, 2021 ; Bonilla-Salomón et al, 2021a ). This concurs with conditions that presumably favored Melissiodon presence.…”

Early Miocene small mammals from MWQ1/2001 Turtle Joint (Mokrá-Quarry, South Moravia, Czech Republic): biostratigraphical and palaeoecological considerations

“…amphibians and reptiles. The diverse community of peri-or semi-aquatic amphibians (Chelotriton, Triturus, Bufo and Pelophylax;Ivanov 2008) and reptiles (Ptychogaster, Natrix, Colubrinae; Alba et al 2018;Ivanov et al 2018Ivanov et al , 2020Luján et al 2014, in press) in MWQ1/2001 indicates the presence of damp and marshy habitats with stagnant or slow flowing waters in the locality. The absence of crocodilians and most of freshwater turtle genera (i.e.…”

“…kalksburgensis; Luján et al 2016Luján et al , 2017 show on the open woodland, bushes and grassland in close vicinity of water reservoirs. The presence of thermophilic taxa in MWQ1/2001 including Python, Varanus, Bavarioboa, as well as elapids and 'Oriental vipers' indicate rather warm climatic conditions during the Miocene Climatic Optimum with mean annual temperatures reaching at least 18-19 °C (Ivanov et al 2018(Ivanov et al , 2020.…”