A New Species of Enyalius (Squamata, Leiosauridae) Endemic to the Brazilian Cerrado

Breitman, María Florencia; Domingos, Fabrícius Maia Chaves Bicalho; Bagley, Justin C.; Wiederhecker, Helga C.; Ferrari, Tayná B.; Cavalcante, Vitor Hugo Gomes Lacerda; Pereira, André C.; Abreu, Tarcísio Lyra; De-Lima, Anderson Kennedy Soares; Morais, Carlos José S.; Prette, Ana C.H. Del; Silva, Izabella P.M.C.; Mello, Rodrigo de Macêdo; Carvalho, Gabriela Ferreira; Lima, Thiago M.De; Silva, Anandha A.; Matias, Caroline Azevedo; Carvalho, Gabriel C.; Pantoja, João A.L.; Gomes, Isabella Monteiro; Paschoaletto, Ingrid Pinheiro; Rodrigues, Gabriela Ferreira; Talarico, ÂNgela V.C.; Barreto‐Lima, André Felipe; Colli, Guarino R.

doi:10.1655/0018-0831.355

Cited by 4 publications

(2 citation statements)

References 75 publications

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“…During the RRF component of the procedure, regularization penalizes the selection of new predictors for the split of observations during the construction of RF decision trees when the information gain ( i.e ., the decrease in Gini impurity) is similar to that obtained with previously used predictors. Machine learning algorithms such as GRRF have proven effective for identifying diagnostic characters in recent papers in systematics (Breitman et al ., 2018; Murphy et al ., 2016). As a result, two GRRF analyses were performed for Hypostomus sp.…”

Section: Methodsmentioning

confidence: 99%

Two new species of Hypostomus suckermouth‐armoured catfishes (Teleostei: Loricariidae) from central Brazil

Soares

Aquino

Bagley

et al. 2021

Journal of Fish Biology

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This study describes two new endemic Hypostomus species from central Brazil, which were previously identified as genetically distinct lineages in a recent genomic study that recommended their testing and potential description based on morphological data. A machine learning classification procedure (random forest) was used to investigate morphological variation and identify putatively diagnostic characters for these candidate species and revealed that each is morphologically distinct. The new species Hypostomus cafuringa is characterized by small size, dark spots under a light background, deeper caudal peduncle and shorter first ray of the pectoral fin and base of the dorsal fin when compared to congeneric species from the region. H. cafuringa is known from the headwaters of the Maranhão River, upper Tocantins River basin, Distrito Federal, Brazil. The second new species, Hypostomus crulsi, is characterized by dark spots under a light background, absence of plates along the abdomen region, shorter first ray of the pelvic fin, shorter first ray of the pectoral fin and smaller body size. H. crulsi is known from the headwaters of the São Bartolomeu River, upper Paraná River basin, Distrito Federal, Brazil. The rapid conversion of natural habitats for agricultural development and the isolation of protected areas represent a serious threat to the continued existence of these two newly described endemic species, which warrant conservation assessment.

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Section: Methodsmentioning

confidence: 99%

Two new species of Hypostomus suckermouth‐armoured catfishes (Teleostei: Loricariidae) from central Brazil

Soares

Aquino

Bagley

et al. 2021

Journal of Fish Biology

Self Cite

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show abstract

“…However, for some highly polymorphic and taxonomic convoluted groups, additional evidence and analyses are frequently needed to provide an improved framework for taxonomic decisions (Breitman et al, 2018; Leaché et al, 2009; Pante et al, 2015). Recent methods and theoretical studies have also indicated combined analyses of morphological and molecular evidence as a more complete approach to assessing the phylogenetic relationship of squamates (Hsiang et al, 2015; Murphy et al, 2016; Pyron, 2015, 2017; Reeder et al, 2015; Wiens, 2004; Wüster et al, 2018; Zaher et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

The systematics of Tachymenini (Serpentes, Dipsadidae): An updated classification based on molecular and morphological evidence

et al. 2022

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Despite the recent advances in the systematics of snakes, the diversity of several Neotropical groups of species remains poorly understood. The lack of studies focused on the phylogenetic relationship within most of the 20 tribes of Dipsadidae precludes a better understanding of the evolution of this diverse family. Here, we present a comprehensive phylogenetic analysis of Tachymenini, a heterogeneous tribe that comprises 36 viviparous species of dipsadids, grouped in seven genera based on morphological similarities. The tribe is widely distributed throughout South America presenting very distinctive phenotypes, habitats, and behaviours. The phylogenetic relationship among tachymenins is a well‐recognized challenge regarding the systematics of the South American dipsadids. The similar morphotype of some generalist species, combined with the very derived morphology of some strict specialists, creates a complexity of traits that has prevented the comprehension of the systematics of the group. To address such a challenge, we combine molecular (six loci) and morphological (70 characters) datasets in an integrative phylogenetic approach. The resultant phylogenetic trees indicate, with strong support, that three of the seven current recognized genera (Tachymenis, Tomodon, and Thamnodynastes) are non‐monophyletic and, consequently, we propose a new systematic arrangement for Tachymenini. We revalidate two genera, Dryophylax and Mesotes, and we describe three additional monotypic genera, Apographon gen. n., Tachymenoides gen. n., and Zonateres gen. n. to accommodate Tomodon orestes, Tachymenis affinis, and Thamnodynastes lanei, respectively. We also include Tomodon ocellatus and Pseudotomodon trigonatus in Tachymenis and describe a new genus, Galvarinus gen. n., to accommodate the Tachymenis chilensis species group. Furthermore, we also provide an evolutionary scenario for the speciation events based on a time‐calibrated tree, commenting on the diversification and origin of the tribe, and on the probable existence of undescribed species of Mesotes and Dryophylax.

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Total evidence phylogenetic analysis of Leiosauridae (Squamata) with focus on the ‘para-anoles’ and description of a new Urostrophus species from the Bolivian Andes

Carvalho

Laspiur

Klaczko

et al. 2023

Systematics and Biodiversity

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A New Species of Enyalius (Squamata, Leiosauridae) Endemic to the Brazilian Cerrado

Cited by 4 publications

References 75 publications

Two new species of Hypostomus suckermouth‐armoured catfishes (Teleostei: Loricariidae) from central Brazil

Two new species of Hypostomus suckermouth‐armoured catfishes (Teleostei: Loricariidae) from central Brazil

The systematics of Tachymenini (Serpentes, Dipsadidae): An updated classification based on molecular and morphological evidence

Total evidence phylogenetic analysis of Leiosauridae (Squamata) with focus on the ‘para-anoles’ and description of a new Urostrophus species from the Bolivian Andes

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