Flávio Dias PassosUniversity of Campinas | UNICAMP · Institute of Biology (IB)
Flávio Dias Passos
PhD
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66
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Introduction
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September 2007 - present
Publications
Publications (66)
Laternula elliptica (P. P. King, 1832) is the sole representative of the anomalodesmatan family Laternulidae and the largest bivalve in the Antarctic and Subantarctic. A keystone species of the regional benthic communities, it has reached model status, having been studied in hundreds of scientific works across many biological disciplines. In contra...
The Anomalodesmata Dall, 1899 includes some of the rarest and most specialised species of marine bivalves. This rarity has consequently constituted the greatest obstacle for understanding the internal relationships due to the low representativeness of species present in any phylogenetic reconstructions. Therefore, with the primary purpose of creati...
The shell-less, worm-like caudofoveate aplacophorans are common inhabitants of the deep-sea. A recent series of studies has demonstrated their phylogenetic, ecological and biogeographical importance for the understanding of marine environments. Falcidens Salvini-Plawen, 1968 is among the most speciose genera of Caudofoveata, including species with...
Fernando de Noronha (henceforth ‘Noronha’) is an oceanic
archipelago of volcanic origin, located ~350 km off the
northeast coast of Brasil (Fig. 1). The eponymous main island
was an important midway port in the Portuguese exploitation
of Brasilian resources during the 16th and 17th centuries (Lins
& Silva, 2013). The island was also briefly occupie...
Records of invertebrates that are able to surpass the capture mechanisms of carnivorous pitcher plants are rare. This work records for the first time land snails living inside the pitchers of Nepenthes graciliflora, a pitcher plant endemic to the Philippines widely sold in Brazil. These gastropods were found adhered in the slippery zone of pitcher...
El gasteròpode Vitta zebra (Bruguière, 1792): una possible espècie anfídroma amenaçada per impactes humans en rius brasilers
Els organismes anfídroms són aquells que creixen, s’alimenten i es reprodueixen en rius, les larves dels quals tot just néixer migren al medi marí, on es desenvolupen, i les juvenils retornen a l’aigua dolça migrant riu amun...
‘Miniaturization’ is a widespread phenomenon among the Metazoa. In the molluscan class Bivalvia, records of miniaturization are numerous. Among the Archiheterodonta, Warrana besnardi (Klappenbach, 1963) has attracted attention for its tiny size, which does not exceed 1.5 mm in shell length, and because it belongs to a group with limited anatomical...
Aplacophorans are common inhabitants of the deep-sea, where many places remain unexplored regarding their biodiversity. Filling a gap in knowledge about these animals from the South Atlantic, Scutopus variabilis sp. nov. (Caudofoveata, Limifossoridae) is described; further, species distribution modelling (SDM) was performed to elucidate the distrib...
Anthropogenic impacts cause habitat losses and reduce biodiversity in marine coastal habitats. Coastal macroalgae beds and their associate invertebrates are highly susceptible to environmental contamination. This study evaluated the differences in diversity parameters of Sargassum-associated gastropod and amphipod assemblages in areas located at di...
Invasive alien species are those that, once introduced from other environments, adapt, starting to reproduce and proliferate in places they did not previously inhabit. The introduction of exotic marine species as a result of anthropic activity, whether intentionally or not, is a process that has been remote for centuries, which makes it difficult t...
The type material of Caudofoveata (Aplacophora) deposited in the molluscan collections of the National Museum of Natural History, Smithsonian Institution (USNM), and of the Museum of Comparative Zoology, Harvard University (MCZ), USA, are listed. An extensive analysis of the databases and a curatorial revision of all lots from both collections were...
Warrana besnardi (Klappenbach, 1963) is the single Atlantic species of the genus, and part of the family Condylocardiidae, composed of 21 genera and about 150 species. Recent availability of many well-preserved specimens allowed us to perform a detailed study of the shell of this species, using scanning electron microscopy and descriptions of the h...
Two new species of Rubyspira and one of Cordesia (Gastropoda: Abyssochrysoidea) are described morphologically and genetically, based on specimens collected from whale bones and wood parcels artificially implanted in the deep southwest Atlantic Ocean, at c. 1500 and 3300 m depths. Rubyspira pescaprae sp. nov. and R. elongata sp. nov. occur preferent...
Ecologically important marine ecosystems should be identified and protected, as is the case of the poorly known SW Atlantic rhodolith beds. Understanding the main variables predicting biodiversity patterns is essential for determining priority areas for conservation. Here, we analyzed the macroinvertebrate associated with rhodoliths from euphotic a...
Oceanic island biotas are known by their high levels of endemism and high vulnerability. In Brazil, only few islands have been studied. The present study reports general information on the distribution and abundance of terrestrial gastropods of the Fernando de Noronha archipelago, a group of islands 345 km off the Brazilian coast. In total, four sp...
The anatomy of one of the smallest non-septate carnivorous bivalves is described herein and is the first anatomical study of a member of the genus Trigonulina. This paper shows that similar to other verticordiids, Trigonulina ornata d’Orbigny, 1853 possesses a suite of anatomical features that include a prey-capturing inhalant siphon, a septum, an...
The taxonomy of the species assigned to the genus Dallocardia (Cardiidae: Trachycardiinae) recorded from the Argentinean and Magellanic biogeographical provinces was reviewed, revealing that two species are present: Dallocardia muricata (Linnaeus, 1758), well known as widely distributed along the western Atlantic, and here considered as having its...
Publicado no livro de resumos do XXVI Encontro Brasileiro de Malacologia (EBRAM).
Macrophytes provide a habitat for many species of marine invertebrates, the gastropods being one of the main components. This study provides new information about Sargassum -associated gastropod biodiversity, through characterization of the fauna from a highly impacted area of Brazil, investigating its variation at a small spatial scale and between...
Aplacophorans are well known as exclusively marine benthic molluscs with a vermiform body covered by aragonitic sclerites (also called spicules), whose species are widely distributed from the sublittoral down to the abyss. Currently, only nine species are known from Brazil (one Solenogastres and eight Caudofoveata), but these very few records are n...
Micro-computed tomography or micro-CT is a minimally invasive technique capable of generating 2D images and 3D tomographic reconstructions of small-sized animals without destroying the physical specimens. The technique has been previously applied to the study of bivalves, and here we extend it to study the anatomy of eight anomalodesmatan species t...
Prochaetodermatidae (Mollusca, Aplacophora, Caudofoveata), typical inhabitants of the deep sea, occur mainly along the continental slope, sometimes in high abundance. Their diversity in some regions, such as the South Atlantic Ocean, is little studied. The genus Claviderma is so far composed of one Pacific Ocean, two Indian Ocean and seven Atlantic...
No artigo Levantamento de Polychaeta (Annelida) na Baía do Almirantado, Ilha Rei George (Antártica), com número de DOI: 10.1590/S0031-10492012001300001, publicado no periódico Papéis Avulsos de Zoologia, Volume 52(13):151‑165, 2012, na página 165:onde se lia:dos Santos, A.S.; Nogueira, J.M.M.; Fukuda, M.V. & Christoffersen, M.L. 2020. New terebelli...
The bivalves of the families Vesicomyidae and Kelliellidae are common bottom inhabitants of the deep-sea, with some taxonomic controversy concerning the smaller forms of the former, which are frequently confused as species of the latter. Based on specimens collected from shallow waters of the southeastern Brazilian coast, a new species of Kelliella...
Falcidens australocaudatus sp. nov. is described from the southeastern Brazilian coast, based on characters of external anatomy, including size, shape, and ornamentation of the sclerites, and on the structure of the radula. It bears a tail characteristically distinct from the trunk, a U-shaped oral shield, and the sclerites of the trunk and shank a...
Of the more than 800 Recent species of Anomalodesmata only 16 have been studied alive. The Septibranchia, comprising a number of carnivorous bivalve superfamilies, are no exception to this generalization and, until recently, no living member of this group has been studied since the 1980s. Collected from the shallow, shelf seabed off Brazil, Cardiom...
Spheniopsis brasiliensis, from depths of 17–148 m off the southern Atlantic coast of Brazil, is a predator of epipsammic micro-crustaceans which it sucks into the infra-septal chamber using a raptorial inhalant siphon and internally generated hydrostatic suction forces. Prey items, which include ostracods, are thought to be
pushed into the funnel-s...
The Spheniopsidae are today represented by five living species of Spheniopsis and nine of Grippina, distributed in the Pacific and Atlantic Oceans. Little is known of their anatomy and the phylogenetic position of the family within the Bivalvia is debated. In order to investigate these questions, the functional morphology of Grippina coronata obtai...
The Spheniopsidae Gardner, 1928 comprises four living species of Spheniopsis Sandberger, 1861 and eight of Grippina Dall, 1912, the latter restricted to the Pacific Ocean, the former also occurring in the Atlantic. Spheniopsis brasiliensis new species and Grippina coronata new species are described from the Brazilian southeastern coast, based on a...
Systematics of Corbulidae supported by anatomical and conchological studies remains confused and controversial because of the considerable phenotypic plasticity of their shells. Ultrastructural spermatozoan study and molecular analyses have been performed to contribute valuable information, which could be used in taxonomy. Electron microscopy was u...
Two species of Falcidens Salvini-Plawen, 1968 (Chaetodermatidae) are recorded for the first time from Campos Basin, off south-eastern Brazil. Seventeen samples with 176 specimens of Falcidens targatus Salvini-Plawen, 1992 were collected from the continental shelf, and 141 individuals of Falcidens acutargatus Salvini-Plawen, 1992 were obtained in 53...
O fital é caracterizado pela formação de bancos de algas marinhas
e uma grande diversidade de espécies associadas, estando a malacofauna
entre seus principais componentes. Com o objetivo de registrar as assembleias de
gastrópodes associadas è alga parda Sargassum C.
Agardh, 1820, este estudo foi realizado no Canal de São Sebastião,
litoral norte do...
Lists o f species Check List 10(1): 97–105, 2014 © 2014 Check List and Authors ISSN 1809-127X (available at www.checklist.org.br) elements in trophic chains and are commercially relevant. Estimates suggest that there are about 1,000 marine bivalve species in Brazil; approximately 300 of these are believed to occur in São Paulo State, but only 191 w...
Cyamiocardium domaneschii n. sp. is described from shallow waters off the Southeastern coast of Brazil. An anatomical study provides comparisons with other Cyamioidea. It has a small shell (up to 3.1 mm in length), valves with a rounded contour, external radial sculpture, a distinct large prodissoconch, and hinge structure characteristics of the ge...
The isolation of Antarctica from South America during the Oligocene (~35 mya) formed the Southern Ocean, generated the northward flow of the Atlantic Antarctic Bottom Water, and numerous unique geological and oceanic processes (e.g. an active spreading centre in the Bransfield Strait, ridge trench collision, gas hydrates on modern sediments, and co...
This study provides the first record of Donax gemmula Morrison, 1971 (Bivalvia: Donacidae) from the Ceará State, Northeast Brazil; up to now it was only known from the Southeastern and Southern Brazilian coast. Shells larger than ~2 mm in length of this species can be distinguished from those of D. striatus Linnaeus, 1767. Both species were collect...
The ultrastructure of bivalve spermatozoa can be species‐specific and often provides important taxonomic traits for systematic reviews and phylogenetic reconstructions. Young individuals of the Donacidae species Donax hanleyanus are often identified as samples of Donax gemmula. Hence, the spermatozoa ultrastructure of both species was described in...
The Museum of Zoology “Adão José Cardoso” (ZUEC), from UNICAMP, was
created in 1992 and since then has been gathering samples of molluscan species
from different parts of the world. As a result of the activities of many scientific
projects voucher specimens have been deposited in the ZUEC, enriching the
molluscan collection and also contributing to...
Despite the great importance of the siphons for infaunal bivalves, only a few studies have examined their tissues using histology techniques or scanning electron microscopy. In the present study, the siphons of Tellina lineata Turton, 1819 and Macoma biota Arruda & Domaneschi, 2005 were investigated. The siphon walls are composed by a series of mus...
The Polychaeta collected during three distinct Brazilian Antarctic Expeditions (December 1996 to January-1997; December 1997 to January 1998; January to April 2001) in the Admiralty Bay have been studied. A total of 127 specimens have been examined and 18 species, belonging to 12 families, have been identified. The family Terebellidae was the most...
Macoma biota Arruda & Domaneschi, 2005, is a recently described species known only from the intertidal zone of Praia da Cidade, Caraguatatuba Bay, in the state of São Paulo, southeastern Brazil. The main purpose of the present paper is to describe the biology of M. biota, beginning with a detailed analysis of its anatomy and functional morphology a...
During identification of bivalve molluscs collected in Antarctica, a rich taxonomic bibliography was gathered, stimulating comparisons with the Brazilian malacofauna. We listed a total of 68 and 368 known shallow-water species (less than 200 m depth) from Antarctica and Brazil, respectively, in order to find species, families and superfamilies in c...
Specimens of Bentharca asperula (Dall, 1881) were obtained from deep waters of the coasts of the Rio de Janeiro and São Paulo States, and their shells described, illustrated and compared with descriptions and illustrations obtained from the literature. This species has a small strongly inequilateral shell, trapezoidal in outline and expanded ventro...
Brood protection is a common feature of marine bivalves from higher latitudes. In this study the pallial organs of the Antarctic
bivalves, Mysella charcoti (Lamy, 1906) and M. narchii Passos & Domaneschi, 2006 were investigated with respect to anatomical characters related to brooding. Both species are simultaneous
hermaphrodites and their eggs con...
In this study, the cellular organization of the gill that harbors symbiotic bacteria is described in the thyasirid Thyasira falklandica collected from South Shetlands in Antarctic. Sections of the gills revealed that T. falklandica belongs to the gill type 3, as described by Dufour (Biol Bull, 208:200–212, 2005), with an elongated lateral zone alon...
The mantle margins of several anomalodesmatans bear multicellular arenophilic glands, the mucoid secretions of which attach sand grains and other foreign particles to the outer surface of the periostracum. These glands have been recorded for many of the anomalodesmatan families and are used as a key morphological character in recent attempts to unr...
Mysella narchii sp. nov. is described from the material collected in shallow-waters of Admiralty Bay at King George Island, South Shetlands,
Antarctica. The species is characterized by shell features, biology and functional anatomy. The main shell features distinguishing
M. narchii sp. nov. from all other Antarctic, Subantarctic and Magellanic Myse...
Mysella charcoti is an Antarctic lasaeid bivalve and the most frequently encountered mollusc in Admiralty Bay, King George Island, South Shetlands. The behaviour of the species in aquaria, combined with analyses of the gross and microscopic morphologies and functioning of the organs in the mantle cavity of living and preserved specimens have allowe...
Donax gemmula Morrison, 1971 is a small bivalve occurring on sandy beaches throughout the Southeastern Brazilian coast to Uruguai. Live specimens were collected from Barequeçaba Beach, São Sebastião, State of São Paulo, Brazil. The animal's behaviour was recorded in situ as well as in aquaria, and its functional morphology registered from specimens...
The bivalves collected in the Western Antarctic and Subantarctic waters by scientists of the Instituto Oceanográfico - USP during the Scientific Brazilian Expeditions to Antarctical-IX are characterised through its conchiliological features, illustrated and their occurrence plotted in maps. A species of bivalve collected by scuba divers of the IO-U...
Brooding is a widespread phenomenon among Antarctic bivalves. Although it should represent a handicap to dispersion, many brooding species have achieved a wide distribution in Antarctic and subantarctic waters, suggesting that they have alternative and effective methods of dispersal. Evidence of such an alternative method is presented here for the...
Projects
Projects (5)
This project aims to preliminarily assess the diversity of Xylophagaidae communities at sunken wood in an understudied basin, the Southwestern Atlantic.
To that end, we will first identify species based on morphological and molecular characters. Then, we will formally describe any new species or genera we come upon. Finally, we will analyze possible discrepancies in community compositions due to differences in substrate hardness and bathymetry.
In the Animal Kingdom, the Phylum Mollusca is second largest in diversity, with about 76.000 known living species. Among the seven molluscan classes, bivalves stands out by having their bodies covered by the shell composed of two parts, the valves, which names the taxon. For Brazil, there are about 500 species of marine bivalves, 368 of them restricted to the continental shelf. Many of these are little studied for they are more rare, small and because they do not have an immediate importance for Man, besides having a bathymetric distribution restricted to the sublittoral. Among these, species of the Family Condylocardiidae Bernard, 1896 stands out, there being two of them recorded from Brazil, Carditopsis smithi (Dall, 1896) and Warrana besnardi (Klappenbach, 1962), the latter known from the southeastern and southern coasts, also occurring in Uruguay. W. besnardi was originally described in the genus Americuna, and recently was transferred to Warrana Laseron, 1953, but this was solely based on conchological characters; for the Condylocardiidae, as a whole, there is virtually no information on the anatomy of its species. Therefore, aiming to study the taxonomy and biology of W. besnardi, its shell and the anatomical characteristics will be investigated in more detail, through light and scanning electron microscopy (SEM). With these data, it is intended to advance in the knowledge about the mode of life, feeding type and details of its reproductive biology, improving the diagnosis of this species, and discussing its position in Warrana and also the implications of the miniaturization to the different anatomical aspects. In fact, the specimens are currently under studies through stereomicroscopes and SEM images, and by histological sections.