Tag Archives: brazil

Newly introduced snail

Agudo-Padrón is a frequent author of news about the southern Brazilian malacofauna. This time he published about a new introduction of a species from Asia, which he identified as Macrochlamys cf. indica (Benson, 1832).

This record was published in a new online journal from the University of El Salvador, named ‘Minerva’; a name which is already applied by at least 2 other journals and thus may be considered as a junior homonym 🙂

Reference:
Agudo-Padrón, I & Souza da Luz, J., 2018 (‘2017’). Primer record confirmado de ocurrencia de un Caracol terrestre indo-asiático en Brasil y las Américas. – Revista Minerva, El Salvador, 1: 19-27.

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Ovachlamys fulgens redescribed

Salles et al. just published a paper on the tropical Helicarionid snail Ovachlamys fulgens (Gude, 1900) for which they used Brazilian material to redescribe the species.

Schermafbeelding 2018-04-10 om 11.49.50

Their abstract reads “The geographical distribution of the jumping snail Ovachlamys fulgens Gude, 1900, originally described from Loo-Choo Island, is expanding rapidly throughout the tropics. The full extent of the environmental damage caused by the in- troduction of this exotic species is still unknown. So far, it has been implicated in damage to orchids and horticultural plants. Ovachlamys fulgens is only known by a few characteristics of the shell and information on its anatomy is scant. The present study aims to redescribe this species based on specimens from Brazil, which is here characterized by the a globose shell, with wide aperture, externally micro-sculptured with undulating spiral groves, umbilicus partially obliterated by a thin plate, pedal sole tripartite, cephalopedal mass consisting of a series of oblique muscles, mantle with two flattened lobes, large caudal horn, pallial cavity small, vascular system evident, auricle fibrous, ventricle highly muscular, aorta subdivided in cephalic and gastric veins, a large kidney internally folded, jaw smooth and crescentic, radulae with 127 teeth per row (55-(8)- 1-(8)-55), each row with about 25 mm, crop absent, salivary glands fused, stomach large with thin walls, ovotestis with at least three distinct lobes, talon totally immersed in the albumen gland, uterus with two regions, capsule gland hardly visible, bursa copulatrix small and sacculiform, penial sheath present, epiphallus small and narrow, nervous ring asymmetrical, visceral ganglion on left side only, five and six nerves running from each cerebral and pedal ganglia, respectively, one statocyst immersed in each pedal ganglion, and two pairs of ganglia (mandibular and buccopharyngeal ganglia) extra to the nervous ring.”

Schermafbeelding 2018-04-10 om 11.50.30

The authors have done a thorough morphological and anatomical study, which will undoubtedly help to identify this species in future.

Reference:
Salles, A.C.A., Oliveira, C.D.C. & Absalão, R.S., 2018. Redescription of the jumping snail Ovachlamys fulgens (Gude, 1900) (Gastropoda: Helicarionoidea: Helicarionidae): An anatomical and conchological approach. – The Nautilus, 132 (1): 19-29.

Santa Catarina snails

Ignacio Agudo-Padron has just published an updated systematic inventory of non-marine  snails from this southern Brazilian state.

The abstract reads: “Based on the last list of non-marine molluscs from Santa Catarina state, published in 2014, the current inventory of continental molluscs (terrestrial and freshwater) occurring in the State of Santa Catarina/SC is finally consolidated, with a verified/confirmed registry of 232 species and subspecies, sustained product of complete 22 years of systematic field researches, examination of specimens deposited in collections of museums and parallel reference studies, covering 198 gastropods (156 terrestrial, 2 amphibians, 40 freshwater) and 34 limnic bivalves, in addition to the addition of another new twelve (12) species (eighth land gastropods – Leptinaria parana (Pilsbry, 1906); Bulimulus cf. stilbe Pilsbry, 1901; Orthalicus aff. prototypus (Pilsbry, 1899); Megalobulimus abbreviatus Bequaert, 1848; Megalobulimus januarunensis Fontanelle, Cavallari & Simone, 2014; Megalobulimus sanctipauli (Ihering, 1900); Happia sp. (in determination process); Macrochlamys indica Benson, 1832 – and four bivalves – Corbicula fluminalis (Müller, 1774); Pisidium aff. dorbignyi (Clessin, 1879); Pisidium aff. vile (Pilsbry, 1897); Sphaerium cambaraense (Mansur, Meier-Brook & Ituarte, 2008) -). Among the species previously related, 26 correspond to exotic and invasive forms (22 gastropods, four bivalves). Additional information regarding its known regional geographic distribution is incorporated/included and updated”.

Schermafbeelding 2018-03-20 om 14.49.03

Personally I found it interesting that Plekocheilus (Eurytus) aff. rhodocheilus (Reeve, 1848) – previously known from one locality – has been collected at three different localities (Agudo-Padron, pers. comm.). As this figure reveals it was also collected alive, but unfortunately the material has not been preserved and so its status remains as only “partially resolved”.

Reference:
Agudo-Padron, I., 2018. Revised and Updated Systematic Inventory of Non-Marine Molluscs Occurring in the State of Santa Catarina/SC, Central Southern Brazil Region. – Advances in Environmental Studies, 2 (1): 54-60.
Available at http://servidordesmtp.com/kennel/AES-2-007.pdf

New Tentacle issue available

Tentacle issue 26 is available now via this link. As always a very interesting overview of short papers and notes related to the conservation of molluscs.

The issue starts with an In Memoriam for Tony Whitten (1953-2017) who, although mainly involved with conservation in Asia, has been of importance for stimulating malacologists for conservation issues. This is best illustrated by a quote from 2001 which was added by the editor: “I would venture to suggest that the majority of malacologists need to poke their heads out from the security of their shells and slither rapidly to be heard and become involved in the issues that threaten the organisms on which their careers are based. This does not mean that this topic take over your own particular speciality and distract your research programme, but it does recognize that you have a profound responsibility to do something [my italics]. The actual and potential threats to many mollusc species, and the trends, can’t get much worse”.

Related to the Neotropics, the following notes are included:

1. Espinosa, A. Measures to control Lissachatina fulica: impact on native terrestrial molluscs in the Dominican Republic.
This papers tells the story how an area of secondary forest, where in August 2017 nine endemic species were found, plus the achatinid, was a few months later completely ‘treated’ with molluscicides and deforestation.

2. Santos, S.B. dos & Miyahira, I.G. Evaluation of the list of endangered non-marine molluscs in Brasil in progress.

3. Agudo-Padron, I. Conservation of non-marine molluscs in Central Southern Brasil: revised and updated inventory of species of Santa Catarina State.

4. Salvador, R.B. et al. Presumed extinct land snail Megalobulimus cardosoi found again in Pedra Talhada Biological Reserve, north-east Brasil.

Gastropods on Rio de Janeiro campus

Alexandre et al. recently published on species they found on one of the campus of Rio de Janeiro’s university. The abstract reads “Gastropoda is the most diverse group of Mollusca. However, many gaps still exist in the knowledge of this group, for example, for terrestrial and freshwater gastropods. Thus, this work presents a mollusk survey of the Urca campus of the Universidade Federal do Estado do Rio de Janeiro, which is bordered by Parque Natural Municipal da Paisagem Carioca and is within the buffer zone of Monumento Natural dos Morros do Pão de Açúcar e da Urca. Eleven collecting sites were chosen and the mollusks were collected directly. A total of 1,829 specimens, distributed in 18 species and 12 families, were found. Considering the number of native species and the first record of one species for Rio de Janeiro State, the present study shows the importance of protected urban areas in the conservation of fauna”.

The paper itself is in Portuguese.

Reference:
Alexandre, G. de L., et al., 2017. Gastropods (Mollusca) present on the Urca campus of the Universidade Federal do Estado do Rio de Janeiro (UNIRIO). – Biotemas, 30 (4): 31-40. (Link)

A new pest species in Brazil

Recently Teixeira et al. (2017) reported on the finding of a new introduced pest species in Brazil. “The Japanese land snail Ovachlamys fulgens is reported for the first time in Brazil. We recorded the species in 2015 and 2017 in the municipalities of Santos and São Vicente in the metropolitan region of Baixada Santista, São Paulo state, southeastern Brazil. We found the species in an urban park and in a secondary forest altered by exotic plants. As this species is considered a pest and is capable of transmitting disease to humans, we propose that urgent measures be taken by the Brazilian government to control its populations”.

Reference:
Teixeira, L. et al., 2017. First record of the Japanese land snail Ovachlamys fulgens (Gude, 1900) (Gastropoda, Helicarionidae) in Brazil. – CheckList, 13 (5): 703–706. https://doi.org/10.15560/13.5.703

Scavenging by macaws

A peculiar observation, already reported in ornithological literature, was repeatedly found in the scavenging of Megalobulimus shells by the Lear’s macaw, Anordorhynchus leari Bonaparte, 1856. The shells were broken and little pieces were eaten, presumable for the uptake of calcium.

The observations were made in northeastern Brazil.

Reference:
Lima, D.M. et al., 2017. Observation on scavenging events on shells of Megalobulimus (Gastropoda: Pulmonata) by Lear’s macaws. – The Festivus, 49(4): 329-331.