FIgures 12-17 - uploaded by Luiz Simone
Content may be subject to copyright.
Huttonella bicolor anatomy: 12) foregut and peribuccal region, dorsal-slightly right view; 13) whole specimen just extracted from shell, right view; 14) same, ventral view; 15) pulmonary-pallial cavity, ventral-inner view; 16) digestive tubes as in situ and some adjacent structures, dorsal-slightly right view; 17) buccal mass isolated, right view. Scales = 0.5 mm.
Source publication
The morpho-anatomy of the micro-predator Huttonella bicolor (Hutton, 1838) is investigated in detail. The species is a micro-predator snail, which is splaying in tropical and subtropical areas all over the world, the first report being from the Amazon Rainforest region of northern Brazil. The shell is very long, with complex peristome teeth. The ra...
Contexts in source publication
Context 1
... approaching to median line gradually. Middle and posterior thirds of cavity lacking visible vessels except for pulmonary vein. Kidney yellow, located posteriorly, occupying ~20% of cavity length and ~50% of its width (details below). Rectum (rt) and ureter (ur) narrow, running along right edge. ventral region mostly hollow, forming oral cavity ( Fig. 17: oy; showed opened in Fig. 18). Jaws want- ing. Pair of radular muscles, or retractors of buccal mass (Figs. 16-21: rm), very thick, fused with each other, originating in columella, in right side of colu- mellar muscle, running towards ventral side about 1.5 times buccal mass length. Radular muscles in- serted in postero-ventral end of ...
Context 2
... odontophore ganglia (of ) fused with each other, located a distance equivalent to nerve ring length away from pedal ganglia, connected with them by pair of connectives, inserted in median-ventral side of each ganglion. Pair of buccal ganglia located in antero-dorsal region of buccal mass, close to esopha- geal origin and salivary insertion (Figs. 12, 17: bg); each ganglion spherical, of about 1/3 cerebral gan- glion size. Pair of statocysts located in ventral region of pedal ganglia, close to median line (sy), contain- ing statoconia. Visceral ganglion located in posterior level of columellar muscle, with ~1/2 size of cerebral ganglion; connective with nerve ring running towards anterior ...
Context 3
... than odontophore length -which indicates that the teeth are not eroded quickly. The very elongated, massive odontophore is a common attribute for streptaxids, certainly used for preying and consuming quickly live food (Steenberg, 1936). However, the odontophore of H. bicolor looks more like an enlargement of an ordinary pulmonate odontophore (Figs. 17-21), un- like the structure of other streptaxids, which appears like a proboscis (personal observation). Anyway, the H. bicolor buccal mass certainly can be protruded so that the radula directly contacts the prey, as is the case for the remaining known streptaxids. However, in face of the scanty literature regarding buccal and odontophore ...
Citations
... For instance, the twotoned hunter snail Gulella bicolor (T. Hutton, 1834) was previously known only from Rio de Janeiro state in SE Brazil and Acre state in the westernmost Brazilian Amazon [39], but one iNaturalist record (observation 42475972) indicates this species presence in Pará state, a locality far removed from the previous occurrences. ...
Although terrestrial gastropods are remarkably diverse, our knowledge of them is still lacking, especially for species from the Global South. As such, new tools to help researchers collect data on these organisms are very welcome. With this in mind, we investigated Brazilian observations on iNaturalist to assess the feasibility of the data available on the platform as a basis for studies on the tropical terrestrial gastropod fauna. The observations on iNaturalist were filtered by country, Brazil, and higher taxa, namely Eupulmonata, Cyclophoroidea and Helicinoidea, yielding a sample of 4,983 observations. These observations were then reviewed in search of records of rare or little-known species, species found outside their previously known range, and interesting ecological interactions. Exotic species made up 35% to 39% of the sampled iNaturalist records. The most commonly observed species were Lissachatina fulica (Bowdich, 1822), Bradybaena similaris (Férussac, 1822), Drymaeus papyraceus (Mawe, 1823), Drymaeus interpunctus (E. von Martens, 1887), Limacus flavus (Linnaeus, 1758), Meghimatium pictum (Stoliczka, 1873), Cornu aspersum (O. F. Müller, 1774), Vaginulus taunaisii (Férussac, 1821), Ovachlamys fulgens (Gude, 1900), and Bulimulus tenuissimus (Férussac, 1832). In total, 166 observations were deemed of interest to our purposes (e.g., rare species, range extensions, ecological interactions), totalling 46 identified species and 16 observations identified at genus level. Among the selected observations, we found pictures of live specimens of species that were previously known only from their shells, such as Megalobulimus pergranulatus (Pilsbry, 1901), bringing to light their appearances in life. Two potentially new species belonging to the genera Plekocheilus Guilding, 1827 and Megalobulimus K. Miller, 1878 were revealed. Additionally, we found records of living individuals of two species that were previously presumed to be possibly extinct, Leiostracus carnavalescus Simone & Salvador, 2016, and Gonyostomus egregius (Pfeiffer, 1845). We take the opportunity to discuss individual records of interest, evaluate the quality of the data and possible improvements, as well the potential and implications of the use of the iNaturalist platform for research in Brazil and other tropical countries. While iNaturalist has its limitations, it holds great potential to help document biodiversity in the tropics.
... twice as long as wide. Salivary gland (Fig. 2C): Single, soft, elongated, with two ducts leaving separately (rather than together as in Huttonella; Simone, 2013), each duct of even thickness throughout its length (overall similar to that of Elma, see Páll-Gergely et al., 2015). Fig. 4. Reproductive anatomy of Nagyelma aliena (Bavay and Dautzenberg, 1912). ...
Nagyelma n. gen. is erected for the northern Vietnamese Ennea aliena Bavay and Dautzenberg, 1912. The most closely related genus is probably Elma H. Adams, 1866, which also has a high-spired shell but differs from the new genus in the absence of a parietal tooth, the pointed-ovoid shell shape, and the penial sheath, which covers only half of the penis.
... nov has a bursa tract diverticulum (Fig. 2). However, the diverticulum is absent in most Streptaxidae genera, Neotropical or otherwise (Schileyko, 2000(Schileyko, , 2018Chaijirawowg et al., 2008;de Winter & Vastenhout, 2013;Simone, 2013;Siriboon et al., 2013Siriboon et al., , 2014aPáll-Gergely et al., 2015;Inkhavilay et al., 2016), including S. glaber (Baker, 1926;Schileyko, 2000). It has only been observed in S. deplanchei (Tillier, 1980), which is similar to S. waukeen sp. ...
A new species of Streptartemon Kobelt, 1905 land snail from Santos, SE Brazil, is herein described as Streptartemon waukeen sp. nov., from specimens originally found in an urban garden. The new species is distributed along coastal urban areas from southern Espírito Santo state to São Paulo state. It can be diagnosed from its congeners by the following features: a comparatively small shell; the penultimate and body whorls bulging and rounded; a small and roughly circular aperture; and the lack of apertural lamellae/teeth. The new species also presents a bursa tract diverticulum, which is a plesiomorphic state in stylommatophoran snails, but absent in most streptaxid genera. Further details of the genital anatomy, as well as DNA barcoding information, are provided.
... Amongst the Pulmonata, at least the malacophagous predatory Streptaxoidea have something similar to a proboscis, in such the snails use to consume the prey without introduce the head inside the preys' shell (Simone, 2013). ...
The proboscis is a remarkable feature developed by some branches of the Gastropoda. The structure is an elongation of the snout associated to the capacity of retraction inside haemocoel, adaptations which are explained in an evolutionary and phylogenetic scenario. Two basic kinds of proboscis exist: the pleurembolic proboscis, which have only partial capacity of retraction, ass syn-apomorphy of the caenogastropod Rhynchogastropoda; and the acrembolic proboscis, which occur as convergence at least in some basal heterobranchs, in pulmonate Streptaxidae, and in caenogas-tropod ctenoglossans. The acrembolic proboscis has total capacity of retraction and is usually related to parasitism. DOI: ____________
... The streptaxids differ from the other 2 families in possessing an eversible proboscis (Simone, 2013), allowing the animal keeping its head and tentacles close to, or even outside of their prey's aperture, while the proboscis does its job. The scolodontids, on the other hand, have a clear protruded gland in dorsal region of posterior end of the foot (Fig. 3). ...
A discussion on the singular physical strategies of defense against predators in South American land snails is exposed, mainly against other carnivore land snails of the families Streptaxidae, Scolodontidae and Spiraxidae, common in the continent. They are (1) apertural barriers (teeth, etc); (2) change in the direction of the shell growth; (3) hypercoiling; (4) hyper-retraction inside the shell; and (5) alterations of size, including giantism and miniaturization; (6) sinister-coiling. Examples, short description and discussion of them are included.
... In Central America, it has been found at: Taboga Island, Panama (Pilsbry, 1926); and the old city of Panama (Pilsbry, 1926(Pilsbry, , 1930; and Nicaragua (López, 1999;Pérez & López, 2003;Pérez et al., 2008). The sites in South America are: Brazil (Pilsbry, 1926;Santos et al., 2008;Simone, 2013); French Guyana (Tillier, 1980) and Venezuela (Ojasti et al., 2001;Venmans, 1963). Presence has been observed in the Antilles-Caribbean at: Jamaica (Rosenberg & Muratov, 2006); Cuba (Aguayo, 1944;Fernández-Garcés, 2008;Maceira et al., 2013;Pilsbry, 1900Pilsbry, , 1926Sarasúa, 1944); Puerto Rico (Schalie, 1948); Trinidad Tobago, Grenada, Saint Thomas (Dundee, 1970(Dundee, , 1974Pérez & López, 2003;Pilsbry, 1900;Tryon, 1885); Dominica (Robinson et al., 2009) and Guadalupe (Bouchet & Pointier, 2003in Santos et al., 2008. ...
... Specific studies on H. bicolor published hitherto have been related to its carnivorous type of feeding, status as an exotic species, biological control measures (Davis & Butler, 1964;Mead, 1961), preferred prey (Srivastava, 1968;Srivastava et al., 1975), effectiveness as a predator of Subulina octona (Bruguière, 1798), a Subulinidae (Mead, 1961) and Vertiginidae = pupillids (Dundee & Baerwald, 1984), taxonomic implications (Annandale & Prashad, 1920;Naggs, 1989), and its anatomy, radula and genital system (Berry, 1965;Chaijirawowg et al., 2008;Dundee & Baerwald, 1984;Simone, 2013). ...
Un ejemplar de Huttonella bicolor = Gulella bicolor (Hutton, 1834) fue capturado en suelo limoarenoso en Tabasco, México; el cual constituye el segundo registro para el estado y el tercero para México. Este pequeño gasterópodo es un depredador que se ha extendido como especie exótica en regiones preferentemente tropicales e insulares; destaca su introducción en islas de Asia y del Caribe. La concha tiene forma de pupa con lamelas o dientes en la abertura. Se comparó con la descripción de la especie. La distribución de la especie en México se extiende a los estados de Veracruz y en Tabasco, lo cual confirma el avance en su distribución a lo largo de la costa del Golfo de México de los Estados Unidos hasta Brasil. Las características de este estreptaxcido en cuanto al riesgo a través del tipo de presa preferida son discutidas.
... Found throughout Peninsular Malaysia(Maassen 2001). Elsewhere, pantropical(Simone 2013).Remarks. Radial ribs faint to distinct. ...
Limestone hills are now gaining global conservation attention as hotspots for short-range endemic species. Levels of land snail endemism can be high at limestone hills, especially at hill clusters that are geographically isolated. In the State of Perak, Peninsular Malaysia, limestone hills have been opportunistically surveyed for land snails in the past, but the majority have yet to be surveyed. To address this knowledge gap, we systematically surveyed the terrestrial malacofauna of 12 limestone hills that, based on our opinion, are a representation of the limestone land snail assemblages within the State. Our inventory yielded high sampling completeness (>85%). We found 122 species of land snails, of which 34 species were unique to one of the surveyed hills. We identified 30 species that are potentially new to science. The number of land snail species recorded at each hill ranged between 39 and 63 species. Four of the sampled limestone hills namely, Prk 01 G. Tempurung, Prk 55 G. Pondok, Prk 47 Kanthan, and Prk 64 Bt Kepala Gajah, have high levels of species richness and unique species, representing 91% of the total species recorded in this study. We identified two clusters of limestone hills in central Perak with distinct differences in land snail species composition – a northern hill cluster on elevated granite bedrock and southern hill cluster in a low-lying valley surrounded by alluvial soils. As limestone hills continue to be quarried to meet the cement demand, the four identified limestone hills, along with other hills from the two clusters, warrant urgent conservation attention in order to maintain high species diversity within Perak's terrestrial malacofauna.
South American land snails are relatively poorly known, but their taxonomic relationships
can be illuminated with the help of detailed anatomical descriptions and comparisons. The
genus Habeas Simone, 2013, species of which are associated with caves, was tentatively
described in the prosobranch family Diplommatinidae. Recently collected samples that permitted
anatomical investigation, revealed that Habeas actually belongs to the eupulmonate family
Urocoptidae. The genus is thus reviewed, including the three so far known species: H. corpus,
H. data and H. priscus, all Simone, 2013. Four new species collected in Brazil are described:
Habeas lekolus (from Cônego Marinho, Minas Gerais), H. peruassus (from Januária, Minas
Gerais), H. lapensis (from Bom Jesus da Lapa, Bahia) and H. claudus (from Cocos, Bahia).
Anatomical description is based on H. lekolus, revealing in its most interesting features, the
absence of the ureter, presence of a pallial gland, lack of anterior duct to digestive gland, small
penis and epiphallus, and absence of bursa copulatrix. Species in this genus usually inhabit
cave habitats and are only found in Bahia (BA) and Minas Gerais (MG ) Brazilian states, in
areas close to São Francisco River. A brief discussion of the family attribution to Habeas is
also performed. The present seven species in a genus recently discovered in a relatively small
area demonstrate how weak the knowledge on the Brazilian malacofauna is.
A biodiversidade do Amapá é única e isso pode ser visto não apenas pela enorme quantidade de novas espécies animais e vegetais, de todos os grupos estudados, que vêm constantemente sendo apresentadas à comunidade científica, como também pela exuberância de ambientes e paisagens que tanto deslumbra quem tem a oportunidade de se dedicar a esse conhecimento.
Este livro não trata apenas de mostrar o valoroso acervo científico do IEPA, mas também conta, de forma velada, o esforço de cada pesquisador envolvido em trazer para a instituição todo o conhecimento adquirido ao longo de tantos anos de trabalho e dedicação ao estudo de cada área aqui apresentada bem como das parcerias com outros pesquisadores e instituições.
Este trabalho apresenta um conjunto de informações científicas de relevância para conhecer os meios físico e biótico que formam o estado do Amapá assim como para entender e desvendar parte do nosso passado escondidos pelo tempo.
Parabenizamos todo o corpo técnico e científico do IEPA pelo excelente trabalho realizado para a formação de nosso acervo e pela dedicação à constante agregação de novos dados e sua incansável manutenção.
A presente obra intitulada: Coleções Científicas do Amapá organizado pelos pesquisadores Patrick de Castro Cantuária, Cecile de Souza Gama e Lúcio Flávio Siqueira Costa Leite possui uma descrição de todas as coleções científicas de referência do estado do Amapá albergadas e mantidas por essa instituição de pesquisa, dentre as quais aborda as coleções Ficológicas, Botânicas (Herbário, Carpoteca e Xiloteca), Fúngicas, Zoológicas (Entomológicas, Malacológica, Carcinológica, Ictiológica, Herpetológica, Ornitológica e Mastozoológica), além das Coleções Arqueológicas e dos Acervos Cartográficos.
The predatory family Streptaxidae is comprised of five species occurring in Thua Thien Hue Province, central Vietnam. The present paper provides an assessment of the literature data relevant to these species and the description of two new species. Haploptychius bachmaensis sp. nov. has an oblique-heliciform shell with elevated spire. The aperture is subcircular, peristome discontinuous, thick and slightly expanded, apertural dentition with one strong parietal lamella. Perrottetia namdongensis sp. nov. has a rounded and protruded shell periphery. The aperture is subcircular, peristome is discontinuous, thick and expanded, apertural dentition with one large, strong parietal lamella, one small upper palatal lamella, one large palatal lamella, one large basal lamella, and one large strong columellar lamella.
