Diversity in fossil Araucaria Juss.: new species from the Middle Jurassic Jaramillo Petrified Forests in Santa Cruz province, Argentina

2020 ◽  
Author(s):  
Robert Noll ◽  
Lutz Kunzmann
Keyword(s):  
New Species ◽  
Middle Jurassic ◽  
Santa Cruz

scholarly journals Coniferous wood of Agathoxylon from the La Matilde Formation, (Middle Jurassic), Santa Cruz, Argentina

2018 ◽  
Vol 92 (4) ◽  
pp. 546-567 ◽  
Author(s):  
Adriana C. Kloster ◽  
Silvia C. Gnaedinger
Keyword(s):  
New Species ◽  
Middle Jurassic ◽  
Secondary Xylem ◽  
Santa Cruz ◽  
Fossil Species ◽  
Dense Forest ◽  
Anatomical Data ◽  
Scatter Plots ◽  
Coniferous Wood

AbstractIn this contribution, four species of Agathoxylon are described from the La Matilde Formation, Gran Bajo de San Julián and central and south-western sectors of Santa Cruz Province, Argentina. Agathoxylon agathioides (Kräusel and Jain) n. comb., Agathoxylon santalense (Sah and Jain) n. comb., Agathoxylon termieri (Attims) Gnaedinger and Herbst, and the new species Agathoxylon santacruzense n. sp. are described based on a detailed description of the secondary xylem. In this work, it was possible to construct scatter plots to elucidate the anatomical differences between the fossil species described on quantitative anatomical data. Comparisons are made with other Agathoxylon species from Gondwana. These parameters can be used to discriminate genera and species of wood found in the same formation, as well as to establish differences/similarities between other taxa described in other formations. Some localities contain innumerable “in situ” petrified trees, which allowed us to infer that these taxa formed small forests, or local forests, or small forests within a dense forest, which is a habitat coincident with the extant Araucariaceae.

Modes of extinction, pseudo-extinction and distribution in Middle Jurassic ammonites: terminology

2001 ◽  
Vol 38 (2) ◽  
pp. 187-195
Author(s):  
Gerd EG Westermann
Keyword(s):  
New Species ◽  
Sea Level ◽  
Middle Jurassic ◽  
Small Populations ◽  
Sea Level Changes ◽  
Range Contraction ◽  
Extreme Form ◽  
Phylogenetic Lineage

Mid-Jurassic Ammonitina (Cephalopoda, Mollusca) provide good examples of true and apparent "extinctions" (i.e., taxon or clade disappearances) at the local, regional, and global scales. A terminology is presented. Extinction is the termination of a phylogenetic lineage or entire clade (not of local demes or regional populations). Extinction was often preceded by progressive range contraction that resulted in diachronous regional disappearance ("extirpation") and occurred with the elimination of the last refuge. Other range contractions, however, were not terminal, but were followed by renewed expansions, resulting in temporary absence of the lineage over part of its known range only, due to pseudo-extinction. Some lineages, called Lazarus taxa, apparently disappeared entirely for short or extended periods by pseudotermination (causing a "phylogenetic hiatus"). This is an extreme form of pseudo-extinction with unknown refuge due to small size and (or) unsuitable facies and location. Lineage or clade reappearance may be in the form of new species, whose relationship to ancestral taxa has been problematic. Some disappearances can be explained with displacive competition, where the replacement taxon is either of endemic origin or an immigrant. Recent research in previously underexplored field areas has closed some of the gaps of documentation by finding the refuges. Range contractions and expansions, together with their regional disappearances and pseudo-extinctions, including pseudotermination, were often causally related to sea-level changes, especially eustasy. Most true extinctions, however, cannot be identified precisely, because they occurred in small populations and (or) refuges. Extinctions presumably did not coincide with global geoevents.

A New Axymyiid Genus with Two New Species from the Middle Jurassic of China (Diptera: Nematocera: Axymyiidae)

2013 ◽  
Vol 87 (5) ◽  
pp. 1228-1234 ◽  
Author(s):  
SHI Guifeng ◽  
ZHU Yan ◽  
SHIH Chungkun ◽  
REN Dong
Keyword(s):  
New Species ◽  
Middle Jurassic ◽  
Two New Species

scholarly journals Two new species of Archaeohelorus (Hymenoptera, Proctotrupoidea, Heloridae) from the Middle Jurassic of China

ZooKeys ◽  
2014 ◽  
Vol 369 ◽  
pp. 49-59 ◽  
Author(s):  
Ren Dong ◽  
Xiaoqing Shi ◽  
Yunyun Zhao ◽  
Chungkun Shih
Keyword(s):  
New Species ◽  
Middle Jurassic ◽  
Two New Species

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.

A new species of Orthobittacus (Mecoptera, Bittacidae) from the Middle Jurassic of Daohugou, Inner Mongolia (China)

2016 ◽  
Vol 107 (2-3) ◽  
pp. 157-162 ◽  
Author(s):  
Katarzyna Kopeć ◽  
Wiesław Krzemiński ◽  
Agnieszka Soszyńska-Maj ◽  
Yizi Cao ◽  
Dong Ren
Keyword(s):  
New Species ◽  
Middle Jurassic ◽  
Inner Mongolia ◽  
Jiulongshan Formation ◽  
A New Species

ABSTRACTThe genus Orthobittacus was established by Willmann (1989) and is characterised by a long Sc vein and the unusually developed medial sector for the Bittacidae. Four Jurassic species have been described in this genus to date: O. abshiricus (Martynova, 1951) from Kirgizia; O.desacuminatus (Bode, 1953) from Braunschweig (Germany); O. polymitus Novokshonov, 1996 from Karatau (Kazakhstan); and O. maculosus Liu, Shih, Bashkuev & Ren, 2016 from the Jiulongshan Formation of Daohugou (China). The fifth congeneric and second species from China, O. suni sp. nov., is described herein. The importance of the genus Orthobittacus for the phylogeny of Bittacidae, as the most plesiomorphic genus, is discussed.

scholarly journals The first fossil wedge-shaped beetle (Coleoptera, Ripiphoridae) from the middle Jurassic of China

2017 ◽  
Author(s):  
Yun Hsiao ◽  
Yali Yu ◽  
Congshuang Deng ◽  
Hong Pang
Keyword(s):  
New Species ◽  
Middle Jurassic ◽  
Inner Mongolia ◽  
Host Preference ◽  
Potential Host ◽  
Incertae Sedis ◽  
Jiulongshan Formation ◽  
Wood Boring ◽  
A New Species

A new species of Ripiphoridae Gemminger & Harold, 1870, Archaeoripiphorus nuwa gen. et sp. nov., is described and illustrated from a well-preserved impression fossil from the Middle Jurassic Jiulongshan Formation collected at Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China, representing the oldest documented occurrence of the Ripiphoridae described from the Mesozoic era. It shares several characters belonging to two basal ripiphorid subfamilies (Pelecotominae and Ptilophorinae), but it cannot be attributed to either of them and is herein placed as Subfamily incertae sedis. An overall similarity between Archaeoripiphorus gen. nov. and Recent Pelecotominae and the occurrence of wood-boring beetles in the same Formation implies a similar parasitoid host preference in xylophagous beetles for A. nuwa gen. et sp. nov., putting a spotlight on a potential host-parasitoid relationship in the Mesozoic.

The genera Tropidozineus Monné & Martins, 1976 and Ozineus Bates, 1863 in Bolivia (Coleoptera: Cerambycidae: Lamiinae): six new species and a new synonym

Zootaxa ◽  
2012 ◽  
Vol 3557 (1) ◽  
pp. 59 ◽  
Author(s):  
MIGUEL A. MONNÉ ◽  
MARCELA L. MONNÉ
Keyword(s):  
New Species ◽  
Santa Cruz ◽  
New Synonym

New species in the genera Tropidozineus Monné & Martins, 1976 and Ozineus Bates, 1863 from Bolivia are described: Tropidozineus wappesi  sp. nov., from Bolivia (Santa Cruz) and Brazil (Amazonas), Tropidozineus adustus sp. nov., Ozineus griseostigma sp. nov., O. achirae sp. nov., O. argus  sp. nov., and O. caliginosus sp. nov., all from Bolivia (Santa Cruz). A new synonym is proposed: Ozineus dubius Aurivillius, 1922 = Ozineus cinerascens Bates, 1863. Keys to the species of Tropidozineus and Ozineus  from Bolivia are presented.

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