Terrestrial Gastropoda from the caves of Presidente Olegário, southeastern Brazil / Gastrópodes terrestres de cavernas da região de Presidente Olegário no sudeste brasileiro

Abstract: Samples of terrestrial gastropods were collected year-round in seven caves in Presidente Olegário municipality, Minas Gerais state, southeastern Brazil, during several expeditions from 2012 to 2014. Twenty-four taxa (plus a single freshwater species), mainly stylommatophorans, were found in the material. The following species are reported for the first time for Minas Gerais state: Alcadia iheringi Wagner, 1910 and Helicina sordida King, 1831 (Helicinidae); Cecilioides consobrina (d'Orbigny, 1841) (Ferussaciidae); Entodina gionensis Morretes, 1940 and Scolodonta interrupta (Suter, 1900) (Scolodontidae); Megalobulimus sanctipauli (Ihering & Pilsbry, 1900) (Strophocheilidae); Drymaeus coarctatus (Pfeiffer, 1845) (Bulimulidae); Habroconus semenlini (Moricand, 1846) (Euconulidae); and Solaropsis aff. rosaria (Pfeiffer, 1849) (Solaropsidae). Furthermore, the species Drymaeus iracema (Simone, 2015) and Drymaeus terreus (Simone, 2015) are synonymized with Drymaeus coarctatus (L. Pfeiffer, 1845).

Resumo: Amostras de gastrópodes terrestres foram coletadas em sete cavernas na região do município de Presidente Olegário, Minas Gerais, Brasil, durane múltiplas expedições ao longo dos anos de 2012 a 2014. Vinte-e-quatro táxons (mais uma única espécie dulciaquícola) foram encontrados, em sua maioria Stylommatophora. As seguintes espécies são aqui reportadas pela primeira vez para o estado de Minas Gerais: Alcadia iheringi Wagner, 1910 e Helicina sordida King, 1831 (Helicinidae); Cecilioides consobrina (d'Orbigny, 1841) (Ferussaciidae); Entodina gionensis Morretes, 1940 e Scolodonta interrupta (Suter, 1900) (Scolodontidae); Megalobulimus sanctipauli (Ihering & Pilsbry, 1900) (Strophocheilidae); Drymaeus coarctatus (Pfeiffer, 1845) (Bulimulidae); Habroconus semenlini (Moricand, 1846) (Euconulidae); e Solaropsis aff. rosaria (Pfeiffer, 1849) (Solaropsidae). Além disso, as espécies Drymaeus iracema (Simone, 2015) e Drymaeus terreus (Simone, 2015) são aqui sinonimizadas com Drymaeus coarctatus (L. Pfeiffer, 1845).

Subnicho etario y biología reproductiva de Parachondria neglectus (Littorinimorpha: Annulariidae) en Manzanillo, Cuba / Age-related subniche and reproductive biology of Parachondria neglectus (Littorinimorpha: Annulariidae) in Manzanillo, Cuba

Resumen Parachondria neglectus es un molusco terrestre de la familia Annulariidae, endémico de Cuba y microlocalizado en la provincia de Granma. En la presente investigación se caracterizaron la dinámica temporal del subnicho etario y algunos aspectos de la biología reproductiva de una población de P. neglectus localizada en Manzanillo, GranmaCuba. Se realizaron 30 expediciones entre diciembre 2013 y febrero 2015. Las comparaciones del largo (t = 8.05, P = 0.007) y diámetro mayor (t = 6.24, P = 0.0001) de las conchas de los juveniles truncados y los juveniles completos mostraron diferencias estadísticas significativas, indicando que ambos grupos representan dos clases de edades diferentes. La comparación del diámetro mayor de las conchas de los adultos truncados y los adultos completos (t = 1.50, P = 0.16) demostró que conforman un misma clase de edad en la población. La existencia de diferencias estadísticas significativas entre el largo (t = 19.45, P = 0.0003) y el diámetro mayor (t = 13.19, P = 0.006) de las conchas de las hembras y los machos reafirmaron el dimorfismo sexual en la especie, resultando las hembras de mayores dimensiones respecto a los machos. La mancha circular blancuzca en las conchas es una característica morfológica externa válida para diferenciar a las hembras adultas y ya apareadas en ocasiones anteriores, del resto de los miembros de la población. El período reproductivo comprendió de julio a diciembre 2014. Las cópulas se observaron de julio a octubre 2014 y estuvieron asociadas a condiciones de precipitaciones abundantes y temperaturas altas del verano. El período de reclutamiento ocurrió de septiembre a diciembre 2014.(AU)

Abstract Parachondria neglectus is a land snail of the Annulariidae family, endemic to Cuba and microlocalized in Granma province. In the present research, the temporal dynamics of age-related subniche and some aspects of the reproductive biology of a P. neglectus population, located in ManzanilloGranma-Cuba, were characterized. Thirty expeditions were performed from December 2013 to February 2015. The comparisons between the length (t = 8.05, P = 0.007) and biggest diameter (t = 6.24, P = 0.0001) of the shells of truncated juveniles and the shells of full juveniles showed significant statistical differences, indicating that both groups represent two kinds of different ages. The comparison between the biggest diameter of the shells of truncated adults and the shells of full adults (t = 1.50, P = 0.16) showed that both groups represent the same kind of age in the population. The existence of significant statistical differences between the length (t = 19.45, P = 0.0003) and the biggest diameter (t = 13.19, P = 0.006) of the females' shells and the males' shells verify the sexual dimorphism in the species, proving to be the females of bigger dimensions in relation to the males. The whitish circular spot in the shells is a valid external morphological characteristic to differentiate the adult females already mated in previous occasions from the rest of the members of the population. The reproductive period was from July to December 2014. Copulations were observed from July to October 2014 and they were associated to conditions of abundant precipitations and high temperatures of summer. The recruitment period took place from September to December 2014.(AU)

Anatomy of Phyllodina persica (Bivalvia: Tellinidae), andits first occurrence in southeastern Brazilian wate

This study presents a detailed anatomy of a rare Western Atlantic tellin, Phyllodina persica,under a comparative scenario. Some characters are shared with other tellinids such as the large hemipalps compared to gills; gills with outer demibranch with a single lamella absent from the pericardial region; the type‑V stomach associated with the style sac conjoined with the proxi‑mal intestine, and distal intestine presenting a dorsal and ventral group of loops, separated by the transverse muscle. The stomach presents a laterally enlarged typhlosole, although shallow, without flange in the margins. This feature is not found in other tellinid species. Another noteworthy feature in the stomach is the aperture of both caeca, which are larger than the left pouch aperture, and as wide as the style sac aperture. Furthermore, there is an interesting small process in the anterior hinge, and a pair of oblique protractor muscles placed posteriorly to the anterior foot retractor muscle, being a new type of intrinsic muscle described in bivalves. In addition to anatomy, this study presents the southernmost record of P. persica, expanding its distribution to the southeastern region of Brazil.

Report of a human accident caused by Conus regius (Gastropoda, Conidae) / Relato de um acidente em ser humano causado por Conus regius (Gastropoda, Conidae)

Conus regius is a venomous mollusc in the Conidae family, which includes species responsible for severe or even fatal accidents affecting human beings. This is the first report on a clinical case involving this species. It consisted a puncture in the right hand of a diver who presented paresthesia and movement difficulty in the whole limb. The manifestations disappeared after around twelve hours, without sequelae.

Conus regius é um molusco venenoso da família Conidae, que inclui espécies responsáveis por acidentes graves ou mesmo fatais em humanos. Os autores relatam pela primeira vez um caso clínico envolvendo a espécie, que inclui uma punctura na mão direita de um mergulhador submarino, que apresentou parestesias e dificuldade de movimentação do membro todo. O quadro desapareceu em cerca de doze horas, sem seqüelas.