From morphology to molecules: a combined source approach to untangle the taxonomy of<i>Clessinia</i>(Gastropoda, Odontostomidae), endemic land snails from the Dry Chaco ecoregion

Cuezzo, María Gabriela; Miranda, María José; Vogler, Roberto E.; Beltramino, Ariel A.

doi:10.7717/peerj.5986

Cited by 12 publications

(8 citation statements)

References 55 publications

(78 reference statements)

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“…The soft parts of four adult individuals (IBS-Ma 383-2, 383-5, 565-3, 565-4) were dissected using a Zeiss Stemi SV6 stereomicroscope with a camera lucida device. Terms proximal and distal refers to the position of an organ or part of an organ in relation to the gamete flow from ovotestis (proximal) to genital pore (distal) (Cuezzo et al 2018).…”

Section: Methodsmentioning

confidence: 99%

The exotic snail Rumina decollata (Linnaeus, 1758) (Gastropoda, Achatinidae, Rumininae) in Argentina: new records, range extension, and areas of origin of Argentine populations

Rau¹,

Beltramino²,

Serniotti³

et al. 2022

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The decollate land snail Rumina decollata (Linnaeus, 1758), native to the Mediterranean region, has been introduced across several countries worldwide. We report here three new records for R. decollata in Argentina, two from Córdoba Province and the first one from Misiones Province, which also constitutes the northernmost record for the country, extending its northeastern distribution range. Species-specific identification was achieved based on anatomical, conchological, and molecular information. DNA data showed that different haplotypes are present in Argentina, which originated from distinct source areas along the native range.

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Section: Methodsmentioning

confidence: 99%

The exotic snail Rumina decollata (Linnaeus, 1758) (Gastropoda, Achatinidae, Rumininae) in Argentina: new records, range extension, and areas of origin of Argentine populations

Rau¹,

Beltramino²,

Serniotti³

et al. 2022

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“…Illustrations of the dissected organs/systems were carried out with the aid of a camera lucida. The terms proximal and distal refer to the position of an organ or part of an organ in relation to the gamete flow from ovotestis (proximal) to genital pore (distal) as in previous works ( Cuezzo, 2006 ; Cuezzo et al, 2018 ). The distinction of the limits between the epiphallus and penis is based on the internal sculpture of their inner wall.…”

Section: Methodsmentioning

confidence: 99%

Geographic distribution modeling and taxonomy of Stephadiscus lyratus (Cothouny in Gould, 1846) (Charopidae) reveal potential distributional areas of the species along the Patagonian Forests

Cuezzo

Medina

Nieto

2021

PeerJ

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Background Stephadiscus lyratus (Couthouy in Gould, 1846), an endemic Charopidae from southern South America, was described from few dry shells. The distribution of this species is known on scattering occurrences, mainly from material deposited in museum collections. We provide here new information on anatomy, habitat, and microhabitat preferences and estimate the potential geographic distribution of the species to test if it is exclusively endemic to the Subpolar Magellanic Forest. Methods Fieldwork was carried out in the National Parks of the Patagonian Forests. Snails were photographed, measured, and dissected for anatomical studies; shells were studied with scanning electron microscopy. Estimation of the species geographical distribution (EGD) was obtained through correlative ecological niche modeling (ENM). We designed a calibration area a priori with known species points of occurrence in the Magellanic Subpolar Forests and borders of the Patagonian steppe. Seven bioclimatic variables of the WorldClim database were used. The best ENMs were calibrated and selected using a maximum entropy method with Maxent v3.3.3K through the R package “kuenm”. Candidate models were created by combining four values of regularization multiplier and all possible combinations of three feature classes. We evaluated candidate model performance based on significance (partial ROC), omission rates (E = 5%), and model complexity (AICc). From the best models obtained, a final model was transferred to a region “G” consisting of the calibration area plus the Valdivian Temperate Forests and whole Patagonian steppe, where we hypothesize that the species could be present. Finally, we obtained binary presence-absence maps. We quantified the proportion of the occurrence points and distribution range of S. lyratus in different land cover categories. To explore the degree of protection of S. lyratus’EGD, we quantified the proportion of its distributional range within protected areas. Results A be-lobed kidney, a close secondary ureter, the terminal portion of the uterus forming a compact glandular mass, and the vas deferens with a dilatation are new anatomical information that distinguishes this species. Stephadiscus lyratus inhabit cold native forest areas, mainly living on or under humid logs in contact with the ground. The main constraining variables to explain S. lyratus distribution in the EGD were BIO3, BIO12, BIO6, and BIO4. The potential area of distribution obtained almost duplicates their original range (140,454 km2) extending to the Valdivian Temperate forests mainly in Chile. Natural and semi-natural terrestrial vegetation was predominant in the potential area of distribution of S. lyratus. However, only 14.7% of this area occurs within current protected areas from Argentina and Chile. The ectothermic physiological traits of this species, low dispersal capacity, and its narrow habitat requirements turn S. lyratus into a potentially vulnerable species.

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“…However, the subsequent blossoming of molecular-phylogenetic studies has for the first time allowed in-depth examination of evolution from the gene up. A key component of this research centres around and below the species, with much of the focus in case studies now reframed as the “species complex” 11–19 . And exciting challenges now involve rethinking of once-given species, including their genetic discrimination 20 as well as delineation of their putative evolutionary components.…”

Section: Visualizing Infraspecific Relationshipsmentioning

confidence: 99%

Integrated species–phenon trees: visualizing infraspecific diversity within lineages

Zehady

Fordham

Ogg

2019

Sci Rep

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The unprecedented detail with which contemporary molecular phylogenetics are visualizing infraspecific relationships within living species and species complexes cannot as yet be reliably extended into deep time. Yet paleontological systematics has routinely dealt in (mainly) morphotaxa envisaged in various ways to have been components of past species lineages. Bridging these perspectives can only enrich both. We present a visualization tool that digitally depicts infraspecific diversity within species through deep time. Our integrated species–phenon tree merges ancestor–descendant trees for fossil morphotaxa (phena) into reconstructed phylogenies of lineages (species) by expanding the latter into “species boxes” and placing the phenon trees inside. A key programming strategy to overcome the lack of a simple overall parent–child hierarchy in the integrated tree has been the progressive population of a species–phenon relationship map which then provides the graphical footprint for the overarching species boxes. Our initial case has been limited to planktonic foraminfera via Aze & others’ important macroevolutionary dataset. The tool could potentially be appropriated for other organisms, to detail other kinds of infraspecific granularity within lineages, or more generally to visualize two nested but loosely coupled trees.

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From morphology to molecules: a combined source approach to untangle the taxonomy ofClessinia(Gastropoda, Odontostomidae), endemic land snails from the Dry Chaco ecoregion

Cited by 12 publications

References 55 publications

The exotic snail Rumina decollata (Linnaeus, 1758) (Gastropoda, Achatinidae, Rumininae) in Argentina: new records, range extension, and areas of origin of Argentine populations

The exotic snail Rumina decollata (Linnaeus, 1758) (Gastropoda, Achatinidae, Rumininae) in Argentina: new records, range extension, and areas of origin of Argentine populations

Geographic distribution modeling and taxonomy of Stephadiscus lyratus (Cothouny in Gould, 1846) (Charopidae) reveal potential distributional areas of the species along the Patagonian Forests

Integrated species–phenon trees: visualizing infraspecific diversity within lineages

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