Maastrichtian crustacea (Brachyura: Decapoda) from the Ocozocuautla Formation in Chiapas, southeast Mexico

2001 ◽  
Vol 75 (2) ◽  
pp. 319-329 ◽  
Author(s):  
Francisco J. Vega ◽  
Rodney M. Feldmann ◽  
Pedro García-Barrera ◽  
Harry Filkorn ◽  
Francis Pimentel ◽  
...  
Keyword(s):  
New Genus ◽  
New Genus And Species ◽  
Associated Fauna ◽  
Planktic Foraminifera ◽  
Impact Site ◽  
Index Species ◽  
The Caribbean ◽  
Chicxulub Impact ◽  
The Impact ◽  
Southeast Mexico

More than thirty complete specimens ofCarcineretes planetariusVega, Feldmann, Ocampo, and Pope, 1997, a member of the extinct decapod family Carcineretidae, have been collected from the upper part of the Ocozocuautla Formation in Chiapas, southeast Mexico. Stratigraphic occurrences ofCarcineretesin the Caribbean Province suggest that this crab should be regarded as an index fossil for the early Maastrichtian. Six samples of this species may represent individuals that died during molting. The sudden disappearance of this family at the end of the Maastrichtian and its restricted paleobiogeographic distribution in the vicinity of the impact site suggest that the Carcineretidae may have been affected by the Chicxulub impact. Other decapod specimens collected from the same localities were assigned to the Xanthidae;Parazanthopsis meyapaquensisnew genus and species, andMegaxantho zoque, new genus and species, are described. They constitute the second and third reports of Cretaceous xanthid crabs from Mexico. A lagoonal paleoenvironment is suggested, based on associated fauna and flora. Occurrences of index species of benthic and planktic foraminifera along with that of diagnostic rudist species confirm an early Maastrichtian age.

scholarly journals Productidinid brachiopods (Strophomenata, Productida), including Martinezchaconia luisae new genus and new species of Linoproductidae, from the Carboniferous of Santiago Ixtaltepec region, Oaxaca, Southeast México

2018 ◽  
Vol 33 (1) ◽  
pp. 205
Author(s):  
Miguel A. TORRES-MARTÍNEZ ◽  
Francisco SOUR-TOVAR
Keyword(s):  
New Species ◽  
New Genus ◽  
New Genus And Species ◽  
Southern Mexico ◽  
The North ◽  
Middle Mississippian ◽  
Index Species ◽  
The Family ◽  
Southeast Mexico

We describe three brachiopod species of the Suborder Productidina from the Ixtaltepec Formation, Carboniferous of the north of Oaxaca State, southern Mexico, found in peri-reef deposits. Stegacanthia bowsheri and Undaria sp. are members of the families Sentosiidae and Monticuliferidae respectively and were found in strata of the Visean (Middle Mississippian). Martinezchaconia luisae, new genus and species of the Family Linoproductidae, was recollected in Bashkirian-Moscovian (Lower-Middle Pennsylvanian) strata. The respective ages are inferred from the index species of brachiopods associated with the productidines herein described.

scholarly journals New sciophilous sponges from the Caribbean (Porifera: Demospongiae)

Zootaxa ◽  
2009 ◽  
Vol 2107 (1) ◽  
pp. 1-40 ◽  
Author(s):  
ROB W. M. VAN SOEST
Keyword(s):  
New Species ◽  
New Genus ◽  
New Genus And Species ◽  
Coral Rubble ◽  
Netherlands Antilles ◽  
The Caribbean ◽  
Three New Species ◽  
The University ◽  
A New Species ◽  
Water Coral

Thirteen new species of sponges are described from coral reefs of the Netherlands Antilles and the Colombian Caribbean. Species were collected during quantitative investigations of reef sponges performed by students of the University of Amsterdam in the period between 1984 and 1991. Most of the reported specimens were taken from undersides of coral rubble, crevices or reef caves (sciophilous habitats) and without exception are small encrusting or fistular sponges. The material reported in this paper includes a new genus and species of Placospongiidae, Placospherastra antillensis n. g. n. sp. , the first Caribbean representatives of the genera Triptolemma (Pachastrellidae) and Megaciella (Acarnidae), viz. Triptolemma endolithicum n. sp. and Megaciella incrustans n. sp., a new species of Timeidae, Timea curacaoensis n. sp., a new species of Microcionidae with peculiar colloscleres, Clathria (Thalysias) collosclera n. sp., two new species of Chondropsidae, viz. Batzella fusca n. sp., and Strongylacidon unguiferum n. sp., three new species of Coelosphaeridae, viz. Forcepia (Forcepia) minima n. sp., Forcepia (Forcepia) fistulosa n. sp., and Forcepia (Leptolabis) microlabis n. sp., a new species of Crellidae, Crella (Grayella) beglingerae n. sp., a new species of Hymedesmiidae, Hymedesmia (Hymedesmia) bonairensis n. sp., and a new species of Mycalidae, Mycale (Paresperella) vitellina n. sp. Most species are represented by only small fragments removed from the substrate by scalpel or diving knife, leaving little and often crumbled preserved type material. This study is intended to demonstrate that the small crusts dominating easily accessible shallow water coral rubble habitats in the Caribbean remain understudied.

scholarly journals Kaloketos pilosus, a new genus and species of Remipedia (Crustacea) from the Turks and Caicos Islands

Zootaxa ◽  
2004 ◽  
Vol 618 (1) ◽  
pp. 1 ◽  
Author(s):  
STEFAN KOENEMANN ◽  
THOMAS M. ILIFFE ◽  
JILL YAGER
Keyword(s):  
New Genus ◽  
Caribbean Region ◽  
New Genus And Species ◽  
Turks And Caicos Islands ◽  
The Family ◽  
Trunk Limbs ◽  
The Caribbean

We describe a new genus and species of remipede crustacean from an anchialine cave on the Turks and Caicos Islands in the Caribbean region. Kaloketos pilosus is a medium-sized species of robust build that occurs in sympatry with other remipedes, and is recognized as a new genus of the family Speleonectidae. Kaloketos is distinguished from other genera of Remipedia by several unique characters that include dense fields of short, feathered setae on most maxillary and maxillipedal segments, and distinctly expanded rami of the larger trunk limbs.

scholarly journals A new genus and species of Serpulidae (Annelida, Polychaeta, Sabellida) from the Caribbean Sea

Zootaxa ◽  
2014 ◽  
Vol 3900 (2) ◽  
pp. 204 ◽  
Author(s):  
NANCY K. PRENTISS ◽  
KATERINA VASILEIADOU ◽  
SARAH FAULWETTER ◽  
CHRISTOS ARVANITIDIS ◽  
HARRY A. TEN HOVE
Keyword(s):  
New Genus ◽  
Caribbean Sea ◽  
New Genus And Species ◽  
The Caribbean

Ovalidota milleri, a new genus and species of bathyal sea cucumber from the Caribbean Sea (Echinodermata: Holothuroidea: Apodida)

Zootaxa ◽  
2004 ◽  
Vol 561 (1) ◽  
pp. 1 ◽  
Author(s):  
DAVID L. PAWSON
Keyword(s):  
Sea Cucumber ◽  
Body Wall ◽  
New Genus ◽  
Caribbean Sea ◽  
New Genus And Species ◽  
Cayman Island ◽  
Grand Cayman ◽  
Shaped Body ◽  
New Family ◽  
The Caribbean

Ovalidota milleri new genus, new species, is a chiridotid holothurian with an egg-shaped body, a broad oral field surrounded by 18 19 (?20) tentacles, and body wall ossicles in the form of typical Chiridota wheels gathered into papillae and also scattered among the papillae. It is known from two localities in the Caribbean, near St. Vincent and at Grand Cayman Island, in bathyal depths of 366-414 metres. The egg-shaped body of this new genus is unique in the Order Apodida. When more material becomes available for study, Ovalidota milleri may be referred to a new family.

Description of a Bizarre New Genus and Species of Ambush Bugs from the Dominican Republic (Heteroptera: Reduviidae: Phymatinae)

2019 ◽  
Vol 3 (4) ◽  
Author(s):  
Paul K Masonick
Keyword(s):  
Dominican Republic ◽  
New Genus ◽  
Diverse Group ◽  
New Genus And Species ◽  
The World ◽  
Predatory Bugs ◽  
The Caribbean

Abstract Enigmatic and rarely collected, ambush bugs of the tribe Macrocephalini (Heteroptera: Reduviidae: Phymatinae) encompass a diverse group of predatory bugs armed with subchelate raptorial forelegs, a greatly enlarged scutellum, and elongate head. Macrocephalini is the most specious of the four tribes of ambush bugs, consisting of 20 genera and 154 species. They are represented in the Caribbean by several remarkable taxa that bear foretarsi, a trait unassociated with macrocephalines found elsewhere in the world. I here describe a new genus and species of Macrocephalini, Capricephala chiaroscuro gen. et sp. nov., native to the island of Hispaniola and one that bears striking differences to other phymatines known from that region.

A new pleurodiran turtle from the Jagua Formation (Oxfordian) of western Cuba

2001 ◽  
Vol 75 (4) ◽  
pp. 860-869 ◽  
Author(s):  
M. S. De La Fuente ◽  
M. Iturralde-Vinent
Keyword(s):  
Pacific Ocean ◽  
New Genus ◽  
Sister Group ◽  
Phylogenetic Hypothesis ◽  
New Genus And Species ◽  
Western Tethys ◽  
The Pacific ◽  
The Pacific Ocean ◽  
The Caribbean

The oldest Jurassic marine pleurodire is reported from the Jagua Formation in western Cuba. These remains are from levels of middle and late Oxfordian age. This turtle represents a new genus and species, Caribemys oxfordiensis. A phylogenetic hypothesis is proposed, whereby Caribemys is considered to be the sister group of Notoemys Cattoi and Freiberg, 1961, plus the Eupleurodira Gaffney and Meylan, 1988. The occurrence of Caribemys oxfordiensis n. gen. and sp. in the Jagua Formation along with plesiosauroids, pliosauroids, ophthalmosaurian ichthyosaurs, and metriorhynchid crocodiles, strongly suggests that during the Oxfordian a marine seaway was present in the Caribbean, connecting the western Tethys with the Pacific Ocean.

scholarly journals Formation of the crater suevite sequence from the Chicxulub peak ring: A petrographic, geochemical, and sedimentological characterization

2021 ◽  
Author(s):  
Pim Kaskes ◽  
Sietze J. de Graaff ◽  
Jean-Guillaume Feignon ◽  
Thomas Déhais ◽  
Steven Goderis ◽  
...  
Keyword(s):  
Compositional Data ◽  
Ocean Water ◽  
New Classification ◽  
Planktic Foraminifera ◽  
Data Set ◽  
Scientific Drilling ◽  
International Ocean Discovery Program ◽  
Chicxulub Impact ◽  
The Impact

This study presents a new classification of a ∼100-m-thick crater suevite sequence in the recent International Ocean Discovery Program (IODP)-International Continental Scientific Drilling Program (ICDP) Expedition 364 Hole M0077A drill core to better understand the formation of suevite on top of the Chicxulub peak ring. We provide an extensive data set for this succession that consists of whole-rock major and trace element compositional data (n = 212) and petrographic data supported by digital image analysis. The suevite sequence is subdivided into three units that are distinct in their petrography, geochemistry, and sedimentology, from base to top: the ∼5.6-m-thick non-graded suevite unit, the ∼89-m-thick graded suevite unit, and the ∼3.5-m-thick bedded suevite unit. All of these suevite units have isolated Cretaceous planktic foraminifera within their clastic groundmass, which suggests that marine processes were responsible for the deposition of the entire M0077A suevite sequence. The most likely scenario describes that the first ocean water that reached the northern peak ring region entered through a N-NE gap in the Chicxulub outer rim. We estimate that this ocean water arrived at Site M0077 within 30 minutes after the impact and was relatively poor in rock debris. This water caused intense quench fragmentation when it interacted with the underlying hot impact melt rock, and this resulted in the emplacement of the ∼5.6-m-thick hyaloclastite-like, non-graded suevite unit. In the following hours, the impact structure was flooded by an ocean resurge rich in rock debris, which caused the phreatomagmatic processes to stop and the ∼89-m-thick graded suevite unit to be deposited. We interpret that after the energy of the resurge slowly dissipated, oscillating seiche waves took over the sedimentary regime and formed the ∼3.5-m-thick bedded suevite unit. The final stages of the formation of the impactite sequence (estimated to be <20 years after impact) were dominated by resuspension and slow atmospheric settling, including the final deposition of Chicxulub impactor debris. Cumulatively, the Site M0077 suevite sequence from the Chicxulub impact site preserved a high-resolution record that provides an unprecedented window for unravelling the dynamics and timing of proximal marine cratering processes in the direct aftermath of a large impact event.

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