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Podocopan Ostracoda (Crustacea) of the Gulf of Mexico
... 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. ...
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. ...
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.
... Swain 1955in Bold (1964; MIRANDA State, brackish water, north coast of Venezuela, no location details (GN, central-north Coastal Region, 10°15'00" N, 67°00'00" W). The geographical distribution includes The Bahamas (Maddocks et al. 2009). Specimens were recovered from recent sediments (Bold 1964). ...
Information on the known species diversity of the non-marine ostracods in Venezuela is compiled from the available literature. The review resulted in 34 species and two varieties, belonging to the superfamilies Cypridoidea and Cytheroidea. Of these, the presence of one species should be confirmed for the country. Furthermore, eight taxonomic entities classified with open nomenclature are mentioned. As additional contributions to the annotated list, georeferences of the records are included, as well as amendments in names and information for some localities. Finally, information about the distribution of some species, which were erroneously assigned to other biogeographic areas, is clarified, which is essential to optimizing the accuracy of subsequent analyses.
... 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. ...
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). ...
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). ...
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). ...
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. ...
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). ...
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.
The current work is part of a taxonomic study on ostracods from Trindade Island and four seamount summits of the Vitoria-Trindade Chain. Twenty-six species belonging to nine families and 17 genera were identified. Five species are described as new, as follows: two Cytheruridae (Hemicytherura trindadensis sp. nov., Semicytherura parva sp. nov.) and three Loxoconchidae (Loxocorniculum micropapillosum sp. nov., Phlyctocythere christophei sp. nov., Phlyctocythere apua sp. nov.). The other taxa are being studied in an ongoing survey.
