ArticlePDF Available
... Distribution: In the Chesapeake Group, USA, the species has been found only in the Yorktown Formation (Late Miocene to Middle Pliocene; Malkin 1953;Forester 1980). It also occurs from Lower Pliocene to Lower Pleistocene in the North Atlantic Coastal Plain (Swain 1968;Maddocks et al. 2009). Lower Miocene (N4 to N7 zones; Blow 1969), Pirabas Formation (Távora 1994a), Pará, Brazil (Nogueira & Nogueira 2017). ...
... It is known from the late Eocene to Holocene in the Gulf coast-Caribbean region, North Cercado, Gurabo and Mao formations; and Río Cana (Gurabo formation; van den Bold 1988). Dominican Republic-Río Gurabo: Panamá, Gulf of Mexico (Maddocks et al. 2009) and Trinidad (van den Bold 1963a). Upper Oligocene to Lower Miocene (N3 to N7 zones; Blow 1969), Pirabas Formation, Pará, Brazil (Nogueira & Nogueira 2017). ...
... Occurrence: Primavera FPR-160 core (samples: AM08 and AM17). Distribution: Upper Miocene to Recent: Trinidad (Upper Miocene and Recent; van den Bold 1963a), Greater Antilles, Miocene of Venezuela (van den Bold 1957), Cuba, Guatemala, Colombia and Panama (Colón Harbor-Recent; vanden Bold 1966d;, Costa Rica, Mexico(Maddocks et al. 2009). Ste. ...
Article
Full-text available
Ostracods from the Upper Oligocene to Lower Miocene Pirabas Formation, Northeastern Amazonia, Pará State, Brazil were examined from one subsurface and four outcrop sections. A total of 119 species were recognized and are illustrated; another 53 species were left in open nomenclature. Twenty-seven of the species are common to the Neogene of Caribbean, another two species are known from areas other than the Caribbean, and one species was already described from the studied unit. This study provides a robust taxonomic database for paleoenvironmental, biostratigraphic and paleogeographic studies and contributes to the knowledge of the paleodiversity of Neogene Ostracods from the Southwestern Atlantic.
... According to Kornicker (1961), earlier studies by Remane (1933), Elofson (1941) and Benson (1959) The subclass Podocopa has a wide range distribution and many species have been reported worldwide including the Caribbean region. Podocopid ostracods are benthic, living as infaunal burrowers, epifaunal crawlers or demersal swimmers (Maddocks et al. 2007). Our results showed that the Podocopa was the most representative group of Caribbean MCEs with the highest abundance and diversity. ...
... The Bairdiidae was the most numerically dominant podocopan family with 728 individuals represented by 13 morphospecies (Fig. 2, 3). Species belonging to this family can be found in shallow and deep waters ranging from 0.6 to more than 3,000 m (Puri and Hulings 1957;Hulings 1959;Kornicker 1961;Baker and Hulings 1966;Maddocks 1969;Maddocks et al. 2007) with some species being restricted to certain depths. Even though the 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 highest densities of bairdiids were found between 30-102 m, specimens were also found in shallow samples from 3-20 m. ...
Article
Full-text available
The taxonomy, and ecology of ostracods in the Caribbean remain incomplete, even though they are among the most successful and ubiquitous microcrustaceans of marine ecosystems. In an effort to enhance our knowledge of the biodiversity, abundance and distribution of benthic ostracods, several sediment samples were collected from mesophotic coral ecosystems (MCEs) of Puerto Rico and U.S. Virgin Islands at different depths (30-102 m) using technical diving. The highest densities of ostracods were found in the deepest samples (≥ 61 m) and these were the most abundant and diverse assemblages. All ostracods collected belong to the subclasses Myodocopa Sars and Podocopa Sars. The Myodocopa was represented by the families Cypridinidae Baird, Polycopidae Sars, Sarsiellidae Brady and Norman, Rutidermatidae Brady and Norman, Cylindroleberididae Müller, and Philomedidae Müller. On the other hand, the Podocopa was represented by the following families: Bairdiidae Sars, Pontocyprididae Müller, Candonidae Kaufmann (subfamily Paracypridinae Sars), Macrocyprididae Müller, Loxoconchidae Sars, Xestoleberididae Sars, and Cytheromatidae Elofson. The subclass Podocopa showed the highest number of individuals and species. There was a ~100% correspondence between morphologically identified species and genetically defined species through a short region of the nuclear large subunit ribosomal DNA, which was shown to be appropriate for species recognition and discrimination in ostracods. Using a morphological (shell shape and ornamentation) and molecular barcoding approach (28S rDNA), we provide the first report of the biodiversity of ostracods in the mesophotic coral ecosystems of northeastern Caribbean.
... Distribution: Lake Metztitlán, East-Central Mexico. It has been reported in the Gulf of Mexico (Machain-Castillo, & Gío-Argáez, 2004;Maddocks et al., 2009). Outside Mexico it has been collected in the Nearctic climatic zone, including the Gulf of Alaska (Brouwers, 1990) and lakes in the USA (Benson, & MacDonald, 1963;Staplin, 1963;Forester, Colman, Reynolds, & Keigwin, 1994;Forester, & Smith, 1994;Forester et al., 1999;Dennison-Budak, 2010). ...
... patzcuaro, C. vidua and D. stevensoni. Eucandona patzcuaro has been already reported for Mexico (Bridgwater et al., 1999b;Maddocks et al., 2009;Garduño-Monroy et al., 2011;Caballero et al., 2013). Tressler (1954) based the description of Eucandona patzcuaro on two male specimens only. ...
Article
Full-text available
The ostracode fauna of the neartic-neotropical transitional zone has remained poorly known until this study. Ten ostracode species inhabit ten highland lakes (five maar lakes (phreatic/phreato-magmatic explosion origin), one volcanic-tectonic lake, three natural dams and one man-made dam) in East-central Mexico. Surface sediments from the deepest part and the littoral zone from all studied lakes were collected. Environmental variables (pH, temperature, dissolved oxygen, conductivity, TDS) were measured in situ and parallel water samples for chemical analysis were collected for habitat description. Widely distributed species in the study area (≥5 lakes) include Cypridopsis vidua, Darwinula stevensoni and Eucandona cf. patzcuaro. Limnocytherina axalapasco is an endemic species and was collected in three maar lakes and in one man-made dam. Rare species included: Chlamydotheca arcuata?, Fabaeformiscandona acuminata?, Ilyocypris gibba?, Limnocythere friabi-lis?, Potamocypris smaragdina? and Potamocypris unicaudata?. Highest species richness (6 spp.) was found in the large and shallow Lake Metztitlán (2.6km 2 , 5.5m deep), with the lake water type HCO 3->>SO 4 2->Cl-Ca 2+ >Na + >Mg 2+. The rest of studied lakes (<63m, <27km 2) had not more than three species. For instance, only two ostracode species were collected in Lake Alchichica, which is the largest, deepest and most saline studied maar lake. Rev. Biol. Trop. 63 (2): 401-425. Epub 2015 June 01.
... Distribution of recorded species along of the Oligo-Miocene Pirabas Formation, Caribbean region and nearby areas with respective paleoenvironments and water depth according toMaddocks et al. (2009), Bold's works, S anchez-Arango (1978. ...
Article
Oligocene-Miocene ostracod biozones are proposed for the ~65 m-thick platform carbonate succession exposed in the Northeastern Amazonia coast, Brazil. Previous biostratigraphic studies based on planktonic foraminifera, nannofossils and palynomorphs are poorly age constrained and have hindered the correlation with other units of the Atlantic Equatorial margin. Tectonic stability of the Northeastern Amazonia coast during Neogene, associated with reduced riverine inflow and continuous sea level rise, allowed the establishment of lagoon/mangroves, tidal channel and shallow platform settings favoring massive proliferation of benthic ostracods. The recurrence of these depositional systems along of entire Oligocene-Miocene succession contributed mainly for the preservation of typical assemblages of lagoonal ostracods. Among thirty-two ostracods genera identified, the most of them are generally polyhalines associated with a mesohaline genus as Perissocytheridea. Rare ostracods genera typical of offshore zone indicate limited oceanic connection with lagoon. Additionally, the rare presence of Cyprideis indicates a relatively stable salinity degree suggesting change in the lagoon dynamic until estuarine conditions. The ostracods comprise more than 100 species, ranging from Upper Oligocene to Lower Miocene with five index species correspondent to a single zone called the Cytherella stainforthi Zone that was subdivided in four sub-biozones: 1) Jugosocythereis pannosa, 2) Quadracythere brachypygaia, 3) Triebelina crumena and 4) Neocaudites macertus. This new zonation was calibrated with the Blow's and Wade's planktonic foraminifers zones (N.3 to N.7 zones corresponding to O6 to M4b of Wade) and with van den Bold's zonation in the Neogene Caribbean region. Ostracod assemblages described here provide an excellent biostragraphic framework for local, intrabasinal and regional correlation for the Oligocene- Miocene deposits of the Northeastern Amazonia coast and Caribbean regions. The strong similarity of to the Caribbean deposits open a discussion about the possible paleobiogeographic affinities between the biotas of the Equatorial Atlantic during the Neogene.
... Fossil is reported since the Pliocene (Aranki, 1987). Maddocks, 1990 (Pl. 1, fig. 4) M. bensoni has been never reported from the presentday Mediterranean Sea, whereas, it has been found in North Brazil (Brady, 1880) and South Atlantic at 834-939 m water depth (Maddocks, 1990), and from the Gulf of Mexico at 1079 m water depth (Maddocks et al., 2009). Fossil specimens have been reported by Sissingh (1972) from bathyal sediments of the Calabrian stage of Rodi and from the Pleistocene of Serra San Biagio (Sciuto, 2015). ...
Article
Full-text available
Ostracod assemblages associated with deep-water corals from the Pleistocene (early Calabrian - MNN19b and 19c biozones) sedimentary succession cropping out along the Scoppo hill (Messina, Sicily) have been studied. Thirty-five taxa were recognized in the samples examined. The association mainly consisted of Pseudocythere caudata Sars, 1866, followed by Macrocyprina succinea (Müller, 1894), Bythocypris obtusata (Sars, 1866), B. bosquetiana (Brady, 1866), Paradoxostoma simile Müller, 1894 and Sclerochilus contortus (Norman, 1862). It has been attributed to a palaeoenvironment located within the deeper horizons of the Circalittoral Zone and higher horizons of the Bathyal Zone. The presence and abundance of shallow water phytal taxa of the genera Paradoxostoma, Paracytherois and Sclerochilus has been explained by the capability of these organisms to extend towards deep environments in the presence of food resources availability. In the Scoppo palaeoenvironment food was presumably provided by organic matter produced by deep coral colonies, as observed for comparable communities in North Atlantic, the Caribbean Sea and off Santa Maria di Leuca in the Mediterranean. Some particularly significant species are illustrated, and two species, i.e., Bythocythere agostinae n.sp. and Microxestoleberis scillae n. sp. are described.
... In Mexico, the Candoninae subfamily is still poorly known and only eight species have been recorded: Candona caudata Kaufmann, 1900(Palacios-Fest et al., 2002, Candona hipolitensis Tressler, 1954(Tressler, 1954, Candona michoa Tressler, 1954(Tressler, 1954, Tressler, 1954(Tressler, 1954Forester, 1985;Bridgwater et al., 1999;Garduño-Monroy et al., 2011;Chávez-Lara et al., 2012, Fabaeformiscandona rawsoni Tressler 1957= Eucandona obtusa (Bronstein 1947 (Maddocks et al., 2009), Pseudocandona punctata (Furtos, 1933) (Czaja et al., 2014), and Fabaeformiscandona acuminata (Fischer, 1854) , all of them from central-northern Mexico, whereas just one, Pseudocandona antilliana, has been found in the southern part of the country (Cohuo et al., 2016). ...
Article
Full-text available
In North America, most species of the Candonidae family belong to the genus Candona . These species are frequently found in freshwater ecosystems and in sediment sequences, which makes them valuable tools for paleoenvironmental reconstructions. Knowledge of Mexican Candona species is limited, however, and scant information exists regarding their taxonomy and ecology. Here we describe Candona alchichica, a new ostracod species we suggest being endemic to Lake Alchichica, central Mexico. The species belongs to the acuminata group of species, based on the presence of 5+1 setae on the second segment of the mandibular palp. It is closely related to C. patzcuaro , C. tahoensis and C. ohioensis , but differs from those species in that the females have an elongated genital field, wide at the base and narrow at the end. Males have elongated hook-like prehensile palps and a particular arrangement of lobes in the hemipenis, i.e ., the a-lobe is inclined with a digitiform basal projection, the b-lobe is distally rounded and the h-lobe is square-shaped and exceeding the length of the b-lobe. Candona alchichica n. sp. and C. patzcuaro display very similar shells in length and morphology, which can cause confusion if identification is carried out in the absence of soft parts, a common situation when dealing with carapace and valve remains in sediment cores. Detailed morphometric analyses, however, revealed a clear difference between the valves of the two taxa. Candona alchichica n. sp. has taller valves (p˂0.05), with concave dorsal margin, and with the anterior margin considerably narrower than posterior margin, all characteristics different from C. patzcuaro. Most important, in spite of their similar shape, the two species exhibit contrasting ecological preferences. Candona alchichica n. sp. inhabits clear, cold, saline, oligotrophic waters, whereas C. patzcuaro dwells in turbid, warm, fresh, eutrophic waters. In addition, we include a revision of the morphological characteristics and taxonomic position of C. patzcuaro , based on type material and specimens collected from the type locality ( i.e ., Lake Pátzcuaro, Michoacán). This study highlights the importance of undertaking detailed morphometric analyses of the recent ostracod fauna to provide reliable taxonomic identifications and ecological characterizations of species, which are critical for accurate paleoclimatic and paleoecological reconstructions.
... The stratigraphic range entirely covers the Pleistocene as A. antemacella has been reported from bathyal sediments of the Vrica section (COLALONGO & PASINI, 1980), from the ODP LEG 107, Site 654, in the Tyrrhenian sea (COLALONGO et al., 1990) and from Monasterace (GRECO et al., 1974). This species has been also found subfossil in the Mozambico Channel in submerged sediments deeper than 1800 m wd (MADDOCKS, 1969 Until now, M. bensoni has been not reported as living in the Mediterranean Sea, whereas it thrives in West Indies and North Brazil (BRADY, 1880) and in South Atlantic at 834-939 m wd (MADDOCKS, 1990), and the Gulf of Mexico at 1079 m wd (MADDOCKS et al., 2009). This species is known as fossil from the bathyal sediments of the Calabrian Stage tage of Rodi (SISSINGH, 1972 M. arcuata is reported as living from the northeastern Atlantic Ocean at 1491-1500 m wd (MADDOCKS, 1990). ...
Article
Full-text available
The ostracod associations of the Lower Pleistocene sedimentary succession cropping out at Serra San Biagio (Catania, Sicily NE) have been investigated. The ostracod fauna from nine samples is poorly diversified but well-preserved: A total of forty taxa of ostracods have been identified, thirty-three at specific level and seven at genus level or doubtful species. Thirty species are considered as constituents of the in situ original assemblages. The associations consist almost exclusively of bathyal taxa such as Bythocypris obtusata (SARS), Anchistrocheles antemacella MADDOCKS, Henryhowella ex H. hirta (COSTA) group, Quasibuntonia radiatopora (SEGUENZA), Retibythere (Bathybythere) scaberrima (BRADY) and Bathycythere vansraateni SISSINGH. Also the Krithe group is well-represented with Krithe compressa (SEGUENZA) and K. pernoides (BORNEMANN). Almost all species, some, particularly interesting from the palaeoecological and palaeogeographical point of view, have been here described, illustrated and commented on, including a species belonging to the genus Cytherella JONES, 1849, found in all samples of the section, which is here proposed as new.
... En el norte del Golfo de México, Bernhard et al.(2008) han reconocido que la biomasa de foraminíferos supera a la de otros grupos de la meiofauna (metazoos) en al menos la mitad de las estaciones estudiadas. En los ecosistemas de mar profundo con condiciones hipóxicas y con presencia de sulfuros los foraminíferos son una componente importante de los ensambles allí encontrados(Bernhard et al. 2000, Robinson et al. 2004).Los ostrácodos no son tan abundantes en aguas profundas, ya que su abundancia y diversidad decrecen rápidamente mas allá de la plataforma continental; sin embargo, este grupo es un constituyente común en los sedimentos carbonatados a todas las profundidades.Ambos grupos han sido estudiados por diversos autores(Maddocks et al. 2009, Sen Gupta et al. 2009 y referencias allí citadas) en el Golfo de México.Los estudios citados se centran en el sector norte del golfo. En este capítulo se presenta un panorama general de las especies y/o asociaciones características de la zona batial y abisal del sur del Golfo de México así como los patrones de distribución de ambos grupos incluyendo las asociaciones encontradas en el volcán de asfalto Chapopote de la zona abisal del sur del Golfo de México que se caracteriza por tener condiciones quimiosintéticas.En el sur del Golfo de México estos microcrustáceos se encuentran desde la línea de costa hasta más de 3000m de profundidad. ...
Book
Full-text available
La frontera final: el océano profundo es una obra de divulgación que llama la atención sobre la importancia del estudio y la conservación de los ecosistemas de aguas profundas presentando investigaciones relevantes recientes sobre esta enorme y poco explorada porción de nuestro planeta.
... The stratigraphic range entirely covers the Pleistocene as A. antemacella has been reported from bathyal sediments of the Vrica section (COLALONGO & PASINI, 1980), from the ODP LEG 107, Site 654, in the Tyrrhenian sea (COLALONGO et al., 1990) and from Monasterace (GRECO et al., 1974). This species has been also found subfossil in the Mozambico Channel in submerged sediments deeper than 1800 m wd (MADDOCKS, 1969 Until now, M. bensoni has been not reported as living in the Mediterranean Sea, whereas it thrives in West Indies and North Brazil (BRADY, 1880) and in South Atlantic at 834-939 m wd (MADDOCKS, 1990), and the Gulf of Mexico at 1079 m wd (MADDOCKS et al., 2009). This species is known as fossil from the bathyal sediments of the Calabrian Stage tage of Rodi (SISSINGH, 1972 M. arcuata is reported as living from the northeastern Atlantic Ocean at 1491-1500 m wd (MADDOCKS, 1990). ...
Article
Full-text available
The ostracod associations of the Lower Pleistocene sedimentary succession cropping out at Serra San Biagio (Catania, Sicily NE) have been investigated. The ostracod fauna from nine samples is poorly diversified but well-preserved: A total of forty taxa of ostracods have been identified, thirty-three at specific level and seven at genus level or doubtful species. Thirty species are considered as constituents of the in situ original assemblages. The associations consist almost exclusively of bathyal taxa such as Bythocypris obtusata (SARS), Anchistrocheles antemacella MADDOCKS, Henryhowella ex H. hirta (COSTA) group, Quasibuntonia radiatopora (SEGUENZA), Retibythere (Bathybythere) scaberrima (BRADY) and Bathycythere vansraateni SISSINGH. Also the Krithe group is well-represented with Krithe compressa (SEGUENZA) and K. pernoides (BORNEMANN). Almost all species, some, particularly interesting from the palaeoecological and palaeogeographical point of view, have been here described, illustrated and commented on, including a species belonging to the genus Cytherella JONES, 1849, found in all samples of the section, which is here proposed as new.
... From the Family Limnocytheridae, only one species has been described in the region, Limnocythere bradbury Forester, 1985, but nine species have been reported here. Limnocythere bradbury, L. friabilis Benson, & McDonald, 1963, L. staplini Gutentag & Benson, 1962, L. sappaensis Staplin, 1963 (Cole, 1969) and L. sanctipatricii (Brady & Robertson, 1869) are known from Northcentral Mexico (McKenzie & Swain, 1967;Swain 1967;Forester 1985;Bridgwater et al., 1999a;Maddocks, Machain-Castillo & Gío-Argáez, 2009), while Cytheridella americana (Furtos, 1936), C. ilosvayi Daday, 1905, and Limnocythere opesta Brehm, 1939 are known from Southern Mexico and Northern Guatemala (Furtos, 1936;Furtos, 1938;Brehm, 1939;Pérez et al., 2010a). Recent surveys of the crater lakes in central Mexico revealed one new species from the genus Limnocytherina Negadaev-Nikonov, 1967. ...
Article
Full-text available
Limnocytherina is a genus conformed by 12 species; its distribution in the American continent is known to be exclusively on the North (neartics), but little is reported about its distribution from Mexico (transition zone) and Central America (neotropics). Different sampling campaigns were undertaken in three crater lakes from the Axalapascos region in East-central Mexico, during 2008, 2009 and 2011. As a product of these campaings, the new species of Limnocytherina axalapasco was found, which displays some intraspecific variability among populations. In this study, we described the taxonomy, the habitat, the ecological preferences and the larval development of this new species. A total of 10 sediment samples (8 littoral, 2 deepest point) were collected from lakes Alchichica, La Preciosa and Quechulac. We found that L. axalapasco is closely related to two North American species: L. posterolimba and L. itasca as well as one Central American species L. royi comb. nov. With the inclusion of L. axalapasco and L. royi to the genus, the distribution of Limnocytherina is extended to Central America. The four most important distinguishing characters of this new species are: 1) valve surface and margins covered with small, spine-like projections; 2) most of the A1 setae with a highly developed setule at distal part, producing a bifurcate appearance; 3) the upper ramus on the hemipenis is elongated, and by far overpasses dorsal/distal margins, distal lobe is triangular and short, while the hook-like process is prominent, outward orientated, and overpassing the tip of the distal lobe; 4) the UR is moderately developed with seta f3 elongated and setae f1 and f2 short. Considering its ecological characteristics and larval development, L. axalapasco was preferably found in alkaline waters dominated by Cl⁻ or HCO3⁻ and Na⁺ or Mg²⁺, temperatures ranging between 19.1 to 20.3°C, and dissolved oxygen concentrations from 5 to 6.5mg/L. This species was abundant in deeper (~64m) areas of the saline Alchichica lake, where surface water displayed conductivity values of up to 2 250µS/cm, and the sand with low percentage of silt resulted the preferred substrate. Along with the description of L. axalapasco, we provide additional information on the hemipenis of L. itasca, L. royi and L. sanctipatricii, and we discuss on the Limnocytherina-type of hemipenis.