First report of the genus Cratera (Platyhelminthes, Geoplanidae) in Argentina, with description of a new species and comments on the species of the genus

Negrete, Lisandro; Brusa, Francisco

doi:10.3897/zookeys.610.9465

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Geoplana as a monophyletic group with 9 species to which were gradually added another 11 species with similar features (Carbayo & Almeida, 2015;Negrete & Brusa, 2016;Rossi et al, 2014Rossi et al, , 2016Rossi & Leal-Zanchet, 2017;Lago-Barcia & Carbayo, 2018;Boll et al, 2019). The most conspicuous diagnostic feature of Cratera is an ejaculatory duct with its distal section being widened (Marcus, 1951;Lago-Barcia & Carbayo, 2018).…”

Section: Emerged Frommentioning

confidence: 99%

“…March 2020), an exclusively Neotropical subfamily. Anatomy and histology of the copulatory apparatus are central for the identification and systematics of these organisms (e.g., E. M. Froehlich, 1955;Negrete & Brusa, 2016). Nonetheless, when in several studies traditional, morphology-based taxonomic approaches were complemented with molecular methodologies, some nominal species were found to be polyphyletic (Sluys et al, 2016;Carbayo et al, 2018;Almeida, Marques & Carbayo, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Peer Review #1 of "Five new pseudocryptic land planarian species of Cratera (Platyhelminthes: Tricladida) unveiled through integrative taxonomy (v0.2)"

Sluys¹

2020

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Background. Cratera is a genus of land planarians endemic to the Brazilian Atlantic forest. The species of this genus are distinguished from each other by a series of external and internal characters, nonetheless they represent a challenging taxonomic issue due to the extreme alikeness of the species analysed in the present work. To resolve these difficulties, we have performed morphological analyses and used three nuclear markers (ribosomal 18S and 28S, Elongation Factor, a new anonymous marker named Tnuc813) and two mitochondrial fragments (Cytochrome oxidase I and a fragment encompassing NADH4 gene, trnF and the beginning of the Cox1 gene) in an integrative taxonomic study. Methods. To unveil cryptic species, we applied a molecular species delimitation approach based on molecular discovery methods, followed by a validation method. The putative species so delimited were then validated on the basis of diagnostic morphological features. Results. We discovered and described four new species, namely Cratera assu, C. tui, C. boja, and C. imbiri. A fifth new species, C. paraitinga was not highly supported by molecular evidence, but was described because its morphological attributes are unique. Our study documents for the genus Cratera the presence of a number of highly similar species, a situation that is present also in other genera of land planarians. The high number of poorly differentiated and presumably recent speciation events might be explained by the recent geological history of the area.

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Section: Emerged Frommentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Peer Review #1 of "Five new pseudocryptic land planarian species of Cratera (Platyhelminthes: Tricladida) unveiled through integrative taxonomy (v0.2)"

Sluys¹

2020

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Can morphometrics help us predict the diet of land planarians?

Boll,

Leal-Zanchet

2022

Biological Journal of the Linnean Society

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The use of morphometrics for taxonomy and to predict the diet of organisms based on related species has been applied to several groups. In this study, for the first time, we used morphometric data of land planarians to find patterns that could differentiate genera and feeding habits. We examined body shape, pharynx shape, mouth position and the thickness of the cutaneous musculature in 135 species of land planarians. Mouth position was explained, in part, by the position of the dorsal insertion of the pharynx, and transverse circularity by the relative thickness of the cutaneous musculature. The character that best separated genera and diet was the thickness of the cutaneous musculature. A principal components analysis recovered some patterns previously revealed by molecular phylogenetics, with some closely related genera appearing close to each other in the biplot. The same analysis also showed two clearly distinct groups, one of species that feed on woodlice and the other of species that feed on soft-bodied prey. We conclude that morphometrics can help to narrow down the potential prey of geoplaninid land planarians and aid taxonomic studies.

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Three new species of Cratera Carbayo et al., 2013 from Araucaria forests with a key to species of the genus (Platyhelminthes, Continenticola)

Rossi¹,

Leal-Zanchet²

2017

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Areas of Araucaria moist forest have been considered to constitute hotspots of land flatworm diversity, harbouring a high number of undescribed species. Herein we describe three new species of land flatworms of Cratera Carbayo et al., 2013 occurring in such type of forest in south Brazil. The three species are differentiated from their congeners mainly by their colour pattern, anatomy of the pharynx and prostatic vesicle, and details of the penis papilla and male atrium. An identification key to species of the genus in the Neotropical region is provided.

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First report of the genus Cratera (Platyhelminthes, Geoplanidae) in Argentina, with description of a new species and comments on the species of the genus

Cited by 4 publications

References 8 publications

Peer Review #1 of "Five new pseudocryptic land planarian species of Cratera (Platyhelminthes: Tricladida) unveiled through integrative taxonomy (v0.2)"

Peer Review #1 of "Five new pseudocryptic land planarian species of Cratera (Platyhelminthes: Tricladida) unveiled through integrative taxonomy (v0.2)"

Can morphometrics help us predict the diet of land planarians?

Three new species of Cratera Carbayo et al., 2013 from Araucaria forests with a key to species of the genus (Platyhelminthes, Continenticola)

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