Tag Archives: argentina

Two papers on CCP snails

Two papers were published, one very recently and one today, related to the material collected by the ‘Comisión Científica del Pacífico’ (CCP). This material was collected during an expedition that lasted from late 1862 to  early 1866 through several Neotropical counties. The material has been deposited in the Madrid museum and was originally studied by Hidalgo (terrestrial molluscs, marine gastropods) and Martínez (marine bivalves).

The terrestrial material has been restudied during a SYNTHESYS project last year, and has resulted in two papers. One dealing with the CCP material and the history of the expedition (Breure & Araujo, 2017), and one dealing with the publication date of Hidalgo’s main paper on the CCP material and related correspondence from him with Crosse in Paris (Breure & Backhuys, 2017).

The link to the first paper is here.

Update:
Due to an unfortunate coincidence at the proof stage (we unexpectedly received only one proof), the following corrections were not made in the published version:
Fig. 3 in the text (page 4) correspond to Fig. 2B
Fig. 4 in the text (page 5) correspond to Fig. 3A
Fig. 5 in the text (page 6) correspond to Fig. 3B
Fig. 6 in the text (page 6) correspond to Fig. 4A
Fig. 7 in the text (page 7) correspond to Fig. 4B
Fig. 8 in the text (page 9) correspond to Fig. 5A
Fig. 9 in the text (page 10) correspond to Fig. 5B
Fig. 10 in the text (page 12) correspond to Fig. 6A
Fig. 11 in the text (page 12) correspond to Fig. 6B
Then, after Fig. 11 in the text, appear Figs. 7A-7B (page 17) that actually correspond to the Figures 7A and 7B; later (page 17) appears Fig. 8G-8H that correspond to Fig. 8.
Finally, Fig. 27H does not depict Bostryx rouaulti as the wrong shell was photographed.

References:
Breure, A.S.H. & Araujo, R. The Neotropical land snails (Mollusca, Gastropoda) collected by the ‘Comisión Científica del Pacífico’. — PeerJ 5: e3065 (142 pp.).
Breure, A.S.H. & Backhuys, W. Science networks in action: the collaboration between J.G. Hidalgo and H. Crosse, and the creation of ‘Moluscos del Viaje al Pacifico, Univalvos terrestres’. — Iberus 35: 11–30.

Snails in birds’ nests

Already published for a while, but just arrived at our library in print: a paper by Miquel et al. (2015) describing the results of studying the nests of birds in Argentine on the content of shells and snails. It formed part of a larger study related to other invertebrates as well from the same source.

The abstract reads as follows: Bird’s nests are specialized habitats that are inhabited by a diverse suite of invertebrates, such as insects, spiders, pseudoscorpions, and ticks. This study presents a list of gastropods found in birds’ nests from Argentina for the first time. A total of 138 specimens of gastropods, belonging to 11 species, 10 genera and 8 families of snails were present in the nests of 42 birds from 6 families in 6 provinces in Argentina. Fifty eight specimens of the snail Pupisoma latens of different sizes were found alive in a nest, representing a new habitat for this species, which has been previously described from the aerial parts of trees. The remaining species were represented by dead specimens (fragments or empty shells), which can be tentatively attributed to bird diets, Among these, the most abundant species were Bulimulus bonariensis bonariensis and Succinea rneridionalis, both as pre-adults. The nests Anumbius annumbi and Furnarius rufus from the province of Buenos Aires had the highest number of specimens. Freshwater snails (Heleobia parchappii, Biomphalaria sp., and Drepanotrema sp.) comprised 13% of the snail species found.

screen-shot-2016-11-22-at-15-54-27

The paper ends with an appendix showing previous references from literature on predation from snails by birds.

Reference:
Miquel, S.E., Turienzo, P. & Di Iorio, O.R. 2015. Gastropod species found in birds’ nests from Argentina. Revista del Museo Argentino de Ciencias Naturales (n.s.) 17: 87–96.

 

New fossil land shells from Patagonia

Miquel & Rodriguez (2015 [2016]) published a new paper on fossil shells from Miocene deposits in Patagonia, Argentina. Among them four new species, of which one is placed in a new genus.

schermafbeelding-2016-11-02-om-12-48-48

“A remarkable fossil assemblage composed of five gastropod taxa is described from the Early Miocene of Santa Cruz (Patagonia, Argentina) in southernmost South America. The assemblage includes extinct and living genera South America, and on geographic distributions and represent background new information on spatial and across time distributions as well as identification of new taxa. A new taxon, Patagocharopa enigmatica n. gen. n. sp., is tentatively assigned to Charopidae. Gastrocopta patagonica n. sp. (Vertiginidae) represents the oldest record of Gastrocopta in Argentina and the southernmost record for the Americas. Punctum patagonicum n. sp. (Punctidae) represents the first record of Punctum for continental South America, and characterized by a protoconch with traces of axial costulae and a teleoconch with strong radial ribs. Zilchogyra miocenica n. sp. is the first Miocene record of the charopid genus Zilchogyra. Fragments of a possible Scolodonta (Scolodontidae) are recorded. Overall, the assemblage represents an important and useful paleoenvironmental tool. This fauna suggests that a more temperate and humid environment than today—with a more dense vegetation cover—was prevalent at this site during the Early Miocene”.

Although the paper appeared in the September 2015 issue of the Journal of Paleontology, the actual publication date seems 2016. In the PDF I received it says “Published online: 22 March 2016”, while also the copyright is from this year. As new taxa are introduced in this paper, this is relevant information.

Reference:
Miquel, S.E. & Rodriguez, P.E., 2015 [2016]. A novel late Early Miocene assemblage of terrestrial gastropods from Santa Cruz (Patagonia, Argentina). – Journal of Paleontology, 89(5): 748-761.

A new fossil Radiodiscus

Papers on Neotropical fossils are rare, but Sergio Miquel is a regular contributor of them. Although Turazzini & Miquel (2014) was overlooked by me, I mention the paper now it came to my attention. The abstract follows after the break.

schermafbeelding-2016-10-26-om-07-12-50

“Numerous fossil gastropods have been recorded in an edaphic level of the middle section of the the Aisol Formation (Mendoza Province, Argentina). This stratigraphic section bears an association of fossil mammals suggesting an early Pliocene age (possible Montehermosan SALMA). Up to four taxa of gastropods have been identified, belonging in Succinea Draparnaud (Succineidae), Gastrocopta Wollaston (Vertiginidae), Bostryx Troschel (Bulimulidae), and a new species of Radiodiscus Pilsbry and Ferriss (Charopidae). The fossil record of terrestrial pulmonate mollusks in Argentina is scarce and mainly restricted to the Quaternary. Thus, the record of these taxa is of paramount importance because it constitutes the oldest record of Gastrocopta and Succinea in Argentina, the first record of Bostryx in Mendoza Province, and the first record of the family Charopidae (Radiodiscus sanrafaelensis nov. sp.) in Pliocene deposits of Argentina”.

Reference:
Turazzini, G.F. & Miquel, S.E., 2014. A terrestrial gastropod community from the Early Pliocene (Neogene) of Mendoza, Argentina, with description of a new species of Radiodiscus Pilsbry and Ferriss, 1906 (Mollusca: Pulmonata: Charopidae). – Ameghiniana, 51(5): 396-404.

More on Argentinian Bostryx

María José Miranda has recently published a new study on several Bostryx species from central western Argentina. As always, this is a thorough paper with lots of anatomical data.

Miranda15

The abstract reads: “The genus Bostryx Troschel, 1847 is endemic to South America, extending from Ecuador to Chile and Argentina. The southernmost Argentinian species of the genus that inhabit San Luis, San Juan and Mendoza provinces, specially the pre-Andes, Andes and Sierras Pampeanas mountain ranges, were examined. This is the first time the anatomy of Bostryx pastorei (Holmberg, 1912), Bostryx reedi (Parodiz, 1947) and Bostryx strobeli (Parodiz, 1956) has been described. Bostryx cordillerae (Strobel, 1874) is re-described regarding shell and anatomy due to new morphological data. The main differences among the species examined are based on shell characters. The distribution of Bostryx mendozanus (Strobel, 1874) and Bostryx cuyanus (Pfeiffer, 1867), other species found in this region, was also discussed”.

As she cited my publication about the subfamily Bostrycinae (Breure, 2012), I feel entitled to correct a possible misinterpretation. From her text it gives the impression that I have a very restricted view of this subfamily, leaving out all species not listed in my 2012 paper. The contrary is true. Page 3 of my paper explicitly stated that the list presented is incomplete, and further research should show which other species belong to this monophyletic clade. As the shell shape may be very misleading, which is corroborated in Miranda’s paper, I invited further research using anatomical and molecular data. Miranda’s paper is a welcome contribution to this end, although she has not presented phylogenetic data which could supplement the available data in GenBank. Hence there is room for further additions…

References:
Breure, A.S.H., 2012. The status of the genus Bostryx Troschel, 1847, with description of a new subfamily (Mollusca, Gastropoda, Bulimulidae). – ZooKeys 216: 1-3.
Miranda, M.J., 2015. The genus Bosoryx in central western Argentina: anatomical and distributional description of four of its southernmost species (Gastropoda, Bulimulidae). – Iheringia, Zoologia 105: 484–498.

New fossil species from Argentina

Miquel & Rodriguez (2016) describe a fossil fauna found in southern Patagania with an interesting composition. One new genus and four new species are described.

MiquelRodriguez5

The abstract is: “A remarkable fossil assemblage composed of five gastropod taxa is described from the Early Miocene of Santa Cruz (Patagonia, Argentina) in southernmost South America. The assemblage includes extinct and living genera South America, and on geographic distributions and represent background new information on spatial and across time distributions as well as identification of new taxa. A new taxon, Patagocharopa enigmatica n. gen. n. sp., is tentatively assigned to Charopidae. Gastrocopta patagonica n. sp. (Vertiginidae) represents the oldest record of Gastrocopta in Argentina and the southernmost record for the Americas. Punctum patagonicum n. sp. (Punctidae) represents the first record of Punctum for continental South America, and characterized by a protoconch with traces of axial costulae and a teleoconch with strong radial ribs. Zilchogyra miocenica n. sp. is the first Miocene record of the charopid genus Zilchogyra. Fragments of a possible Scolodonta (Scolodontidae) are recorded. Overall, the assemblage represents an important and useful paleoenvironmental tool. This fauna suggests that a more temperate and humid environment than today—with a more dense vegetation cover—was prevalent at this site during the Early Miocene”.

MiquelRodriguez7

Reference:
Miquel, S.E. & Rodriguez, P.E., 2016. A novel late Early Miocene assemblage of terrestrial gastropods from Santa Cruz (Patagonia, Argentina). — Journal of Paleontology X: 1–14 (advance access).

Veronicellidae in Argentina

Santin & Miquel (2015) published recently on the family Veronicellidae in Argentina. Always a tricky family, thus it is a nice contribution to our knowledge of this fauna.

SM162SM161

The abstract reads:

SM163

Reference:
Santin, R.A. & Miquel, S.E., 2015. Veronicellidae in Argentina: taxonomy, morphology and distribution. – Archiv für Molluskenkunde 144: 105–123.