Fossil woods from the Eocene–Oligocene (Río Turbio Formation) of southwestern Patagonia (Santa Cruz province, Argentina)

IAWA Journal ◽  
2019 ◽  
Vol 40 (3) ◽  
pp. 596-S3 ◽  
Author(s):  
Roberto R. Pujana ◽  
Daniela P. Ruiz
Keyword(s):  
New Species ◽  
Taxonomic Composition ◽  
Fossil Wood ◽  
Age Difference ◽  
Santa Cruz ◽  
Isotopic Dating ◽  
Stratigraphic Unit ◽  
Genus Level ◽  
Fossil Leaves ◽  
A New Species

ABSTRACTOver 80 samples of fossil woods were collected from numerous outcrops of the Río Turbio Formation, southwestern Patagonia. Preservation of the woods is variable and only about half of these samples could be identified to genus level. The assemblage consists of six types of conifers and four types of dicotyledons, one of them a new species of Caldcluvioxylon (Cunoniaceae). We provide an emended diagnosis of Caldcluvioxylon. A previously described fossil wood from this stratigraphic unit, thought to have affinity with Proteaceae, was re-examined and is described herein as Scalarixylon romeroi sp.nov. Other families recognized in the Río Turbio Formation wood assemblage are Araucariaceae, Podocarpaceae, and Nothofagaceae. Differences in the taxonomic composition of the upper and lower members of the Río Turbio Formation are consistent with the age difference between them according to recent isotopic dating. The diversity of fossil wood is also consistent with the fossil leaves and pollen from each stratigraphic level and most of the taxa are shared with coeval Antarctic fossil wood floras.

A new species Cyclocephala Dejean, 1821 from Bolivia (Scarabaeidae: Dynastinae: Cyclocephalini)

2021 ◽  
Vol 28 (2) ◽  
Author(s):  
BRETT RATCLIFFE
Keyword(s):  
New Species ◽  
Similar Species ◽  
Distribution Map ◽  
Santa Cruz ◽  
A New Species

Cyclocephala vulcanorum is described as a new species from the Refugio Los Volcanes in Santa Cruz de la Sierra Department in Bolivia. A description, a diagnosis separating the new species from similar species, illustrations, and a distribution map are provided.

А new species of Alona Baird, 1843 (Cladocera: Chydoridae) from the ancient Lake Ohrid

Zootaxa ◽  
2018 ◽  
Vol 4526 (4) ◽  
pp. 434
Author(s):  
ARTEM Y. SINEV ◽  
CHARO LÓPEZ-BLANCO
Keyword(s):  
New Species ◽  
Ancient Lakes ◽  
Ancient Lake ◽  
Lake Ohrid ◽  
Genus Level ◽  
Palearctic Species ◽  
Level Group ◽  
A New Species

A new species of Cladocera, Alona begoniae sp. nov. (Anomopoda: Chydoridae) was found in ancient Lake Ohrid. Its habitus and outer morphology is similar to one of the most common Palearctic species, Coronatella rectangula (Sars, 1862), and this can be the main reason why it has remained undiscovered. A. begoniae sp. nov. belongs to the elegans-group of Alona s. lato, a relict genus-level group not formally recognised yet as a separate taxonomical unit. Its habitat seem to be sandy and stony substrates (at 2–12 m depth) bare of vegetation. The position of this new species within the Alona-like anomopods is evaluated and similarities with other cladocerans in ancient lakes are discussed. 

Sur l'anatomie et les affinites du Dadoxylon (Araucarioxylon) sahariense nov. sp., bois fossile du Continental intercalaire de l'Emi-Fezzan

1956 ◽  
Vol S6-VI (1-3) ◽  
pp. 227-236 ◽  
Author(s):  
Marie Veillet-Bartoszewska
Keyword(s):  
New Species ◽  
Fossil Wood ◽  
Continental Intercalaire ◽  
Continental Deposits ◽  
Identification Of Species ◽  
A New Species

Abstract Describes a new species of fossil wood--Dadoxylon (Araucarioxylon) sahariense--from continental deposits of the Emi-Fezzan region (Libia) in the Sahara. The new species is compared with other African Mesozoic Araucariaceae, and a key to the identification of species is presented.

A new species of Melzerella Lima from Bolivia (Coleoptera: Cerambycidae: Lamiinae: Aerenicini) with a key to known species

Zootaxa ◽  
2011 ◽  
Vol 2805 (1) ◽  
pp. 31
Author(s):  
JAMES E. WAPPES ◽  
STEVEN W. LINGAFELTER
Keyword(s):  
New Species ◽  
Santa Cruz ◽  
A New Species

A new species of Melzerella Lima is described from Santa Cruz Department, Bolivia. A key to the four known species is provided, along with color photographs documenting their vibrant patterns.

Callochiton monteleonensis n. sp., first record of Polyplacophora (Mollusca) from the Neogene of Argentina

2011 ◽  
Vol 85 (6) ◽  
pp. 1181-1187 ◽  
Author(s):  
Diego Urteaga ◽  
Miguel Griffin ◽  
Guido Pastorino
Keyword(s):  
New Species ◽  
New Zealand ◽  
Central Area ◽  
First Record ◽  
Early Miocene ◽  
Southwestern Atlantic ◽  
Santa Cruz ◽  
Recent Species ◽  
A New Species

A new species of chiton is described from early Miocene deposits of the Monte León Formation, in Santa Cruz Province, Argentina. Callochiton monteleonensis n. sp. clearly differs from known fossil and Recent species of the southwestern Atlantic because the central area of its intermediate valves has a stepped appearance, in which each step is marked by a longitudinal rib. It is similar to Callochiton kapitiensis Mestayer, 1926, a Recent species from New Zealand. Biogeographic implications are discussed. This is the first record of a polyplacophoran from Neogene deposits of Argentina.

A new species of the genus Leucheria (Asteraceae, Nassauvieae) from Argentina

Phytotaxa ◽  
2019 ◽  
Vol 404 (1) ◽  
pp. 51 ◽  
Author(s):  
PAOLA JARA-ARANCIO ◽  
FRANCISCO RATTO ◽  
ADRIANA BARTOLI ◽  
GINA ARANCIO ◽  
MARTÍN R. CARMONA-ORTIZ
Keyword(s):  
New Species ◽  
Perennial Herb ◽  
Santa Cruz ◽  
A New Species

Leucheria arancioi Jara-Arancio, Ratto & Adr. Bartoli (Asteraceae, Nassauvieae) is recognized as a new species. It was previously known as L. diemii var. purpurea Ratto, Bello & Adr. Bartoli. This is a perennial herb that inhabits the western part of the province of Santa Cruz, Department Río Chico, in the Patagonian phytogeographic province. Evaluation of morphological and molecular differences between the varieties of L. diemii showed that there are discriminating characters that warrant recognition of L. arancioi as a new species.

Marine Tardigrada from the Mexican Caribbean with the description of Styraconyx robertoi sp. nov. (Arthrotardigrada: Styraconyxidae)

Zootaxa ◽  
2020 ◽  
Vol 4731 (4) ◽  
pp. 492-508 ◽  
Author(s):  
WILBERT ANDRÉS PÉREZ-PECH ◽  
ALBERTO DE JESÚS-NAVARRATE ◽  
ERICA DEMILIO ◽  
ABRIL ANGUAS-ESCALANTE ◽  
JESPER GULDBERG HANSEN
Keyword(s):  
New Species ◽  
Caribbean Coast ◽  
Genus Level ◽  
Mexican Caribbean ◽  
A New Species

Marine tardigrades were sampled at three sites on Mexico’s Caribbean coast. Eleven taxa were collected, one of which is described as a new species. Styraconyx robertoi sp. nov. is characterized by: asymmetric primary clavae; dorsal cuticle with a grid-like sculpture; claws with reduced accessory hooks; females with peduncles on only two digits (the external) of legs I–IV; males with peduncles only on the external digits of legs I–III and peduncles on all four digits of leg IV. Styraconyx robertoi sp. nov. is most similar to S. craticuliformis Chang & Rho, 1998 and S. kristenseni Renaud-Mornant, 1981 by having asymmetric primary clavae but differs from S. craticuliformis mainly by the number of peduncles and from S. kristenseni mainly by the presence of a grid-like dorsal sculpture. Additionally, a comparison of material collected from the same region, but reported previously only as genus level records, was carried out in order to produce a refined list of the known Mexican marine tardigrade species. 

Description of a new species of Microcerella (Diptera: Sarcophagidae) from Argentinean Patagonia

Zootaxa ◽  
2006 ◽  
Vol 1124 (1) ◽  
pp. 47
Author(s):  
JUAN C. MARILUIS
Keyword(s):  
New Species ◽  
New Record ◽  
Santa Cruz ◽  
Argentinean Patagonia ◽  
A New Species

Microcerella coniceti sp. nov. is described and illustrated from Santa Cruz province, Argentina, based on male specimens. A new record of Microcerella curicoensis (Lopes) from Austral Argentinean Patagonia is provided.

Rediscovery, redescription, and illustrations of the milliped, Mitocybe auriportae Cook and Loomis, 1928 (Colobognatha: Platydesmida: Andrognathidae)

Zootaxa ◽  
2010 ◽  
Vol 2475 (1) ◽  
pp. 39 ◽  
Author(s):  
ROWLAND M. SHELLEY
Keyword(s):  
New Species ◽  
Family Group ◽  
Geographical Proximity ◽  
Santa Cruz ◽  
Marin County ◽  
The Family ◽  
Two Component ◽  
A New Species

Mitocybe auriportae Cook and Loomis, 1928, is a thread-like, densely pubescent andrognathid milliped that lacks exoskeletal ornamentations and is equivalent in size to the veins in decaying leaves. Its anterior gonopods are dominated by a broad, subtriangular sternum; the falcate ultimate podomere arises subterminally and is directed ventrolaterad. The species is known from a single collection 91 years ago in Marin County, California; I report a new locality in Santa Cruz County and redescribe and illustrate somatic and gonopodal features. Mitocybe Cook and Loomis, 1928, is monotypic; a new species from Guerrero, Mexico, reported 30 years ago, is still undescribed and, from geographical proximity, probably referrable to Andrognathus Cope, 1869. Somatic features of these genera are contrasted. The taxonomy of Platydesmida is uncertain because it is based on somatic, rather than gonopodal, features and because Brachycybe Wood, 1864, bridges the anatomical gap between the two component families. The family-group name, Mitocybeini Hoffman, 1980, is available to accommodate Mitocybe. In situ SEM examinations of colobognath gonopods do not show details of the anterior gonopod sternum, and studies on dissected gonopods are recommended.

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