A new asteroid (Echinodermata) faunule from the Early Cretaceous (Barremian) of Morocco

2011 ◽  
Vol 85 (6) ◽  
pp. 1021-1034 ◽  
Author(s):  
Daniel B. Blake ◽  
Roland Reboul
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Deep Water ◽  
Small Specimen ◽  
Northwest Africa ◽  
The Pacific ◽  
The Family ◽  
Morphologic Evolution ◽  
The Pacific Ocean

An asteroid (Echinodermata) faunule of four taxa representing three surviving families and a probable fourth is described from the Barremian (Early Cretaceous) of Morocco, northwest Africa. The four together suggest limited morphologic evolution since the Cretaceous but biogeographic and depth patterns have changed. Marocaster coronatus n. gen. n. sp. (Valvatida, Goniasteridae) combines apparent derived features of the dorsal disk and superomarginal shape with more stemward expressions of the abactinal ossicles. Betelgeusia orientalis n. sp. is a fourth Mesozoic occurrence of the Radiasteridae (Paxillosida), the new species similar to earlier occurrences from the Middle Jurassic of India, the Early Cretaceous of Texas, and the Late Cretaceous of Europe. Reported modern occurrences of the family are few, widely scattered, and limited to deeper water; the extinct species together testify to a once-broader familial distribution. Dipsacaster africanus n. sp., a member of the Astropectinidae (Paxillosida), is remarkably similar to extant congeners. Dipsacaster today is widely distributed in the Pacific Ocean but occurrences in the Atlantic are few. Because of preservation, a single small specimen of the Zoroasteridae? (Forcipulatida) cannot be identified with certainty. Extant zoroasterids are deep-water in distribution, although shallow-water Eocene representatives are known.

Late Cretaceous and Tertiary aporrhaid gastropods from the southern rim of the Pacific Ocean

1995 ◽  
Vol 69 (4) ◽  
pp. 692-702 ◽  
Author(s):  
William J. Zinsmeister ◽  
Miguel Griffin
Keyword(s):  
New Species ◽  
New Zealand ◽  
South America ◽  
Late Cretaceous ◽  
Late Eocene ◽  
Southern South America ◽  
Early Tertiary ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Early Cenozoic

The new subfamily Struthiopterinae is proposed for the aporrhaid gastropods occurring in the Late Cretaceous-early Tertiary Weddellian Province along the southern margin of the Pacific. The following genera are placed within the Struthiopterinae: Struthioptera Finlay and Marwick, 1937; Austroaporrhais n. gen.; and Struthiochenopus n. gen. The temporal and biogeographic distribution of members of Struthiopterinae show a similar pattern to other Southern Hemisphere groups of Late Cretaceous and early Cenozoic molluscs with initial disappearance from the western Australasia of the Weddellian Province by the Paleocene while surviving in Antarctica until the late Eocene and eventually disappearing in southern South America during the early Miocene.Also included in this paper is a reappraisal of the species assignable to these genera from Late Cretaceous and early Tertiary of New Zealand, Antarctica, and southern South America together with the description of five new species. The following new species of the Struthiopterinae are described: Austroaporrhais larseni n. sp., A. stilwelli n. sp., A. dorotensis n. sp., Struthiochenopus antarcticus n. sp., and S. philippii n. sp.

First record of the family Ringiculidae (Gastropoda) from the Middle Tertiary of Antarctica

1990 ◽  
Vol 64 (3) ◽  
pp. 373-376 ◽  
Author(s):  
William. J. Zinsmeister ◽  
Jeffrey D. Stilwell
Keyword(s):  
New Species ◽  
New Zealand ◽  
Late Cretaceous ◽  
First Record ◽  
Late Eocene ◽  
Late Mesozoic ◽  
Early Tertiary ◽  
The Pacific ◽  
The Family ◽  
A New Species

A new species of the late Mesozoic–Cenozoic family Ringiculidae (Ringicula (Ringicula) cockburnensis n. sp.) is described from basal glauconitic beds of late Eocene age of Cockburn Island, Antarctica, and is the first reported occurrence of the family Ringiculidae from the continent of Antarctica. Ringicula (R.) cockburnensis n. sp. most closely resembles R. castigata from the middle Oligocene Duntroonian Stage of New Zealand and provides further support for the strong provinciality (Weddellian Province) that existed along the southern margin of the Pacific during the Late Cretaceous and early Tertiary.

scholarly journals The earliest mammal of the European Paleocene: The multituberculateHainina

2000 ◽  
Vol 74 (4) ◽  
pp. 701-711 ◽  
Author(s):  
P. Peláez-Campomanes ◽  
N. López-Martínez ◽  
M.A. Álvarez-Sierra ◽  
R. Daams
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Mass Extinction ◽  
Late Paleocene ◽  
The Family ◽  
Extinction Event ◽  
Masticatory System ◽  
Mass Extinction Event ◽  
A New Species

A new species of multituberculate mammal,Hainina pyrenaican. sp. is described from Fontllonga-3 (Tremp Basin, Southern Pyrenees, Spain), correlated to the later part of chron C29r just above the K/T boundary. This taxon represents the earliest European Tertiary mammal recovered so far, and is related to otherHaininaspecies from the European Paleocene. A revision of the species ofHaininaallows recognition of a new species,H. vianeyaen. sp. from the Late Paleocene of Cernay (France). The genus is included in the family Kogaionidae Rãdulescu and Samson, 1996 from the Late Cretaceous of Romania on the basis of unique dental characters. The Kogaionidae had a peculiar masticatory system with a large, blade-like lower p4, similar to that of advanced Ptilodontoidea, but occluding against two small upper premolars, interpreted as P4 and P5, instead of a large upper P4. The endemic European Kogaionidae derive from an Early Cretaceous group with five premolars, and evolved during the Late Cretaceous and Paleocene. The genusHaininarepresents a European multituberculate family that survived the K/T boundary mass extinction event.

Large fossil birds from a Late Cretaceous marine turbidite sequence on Hornby Island (British Columbia)

2011 ◽  
Vol 48 (11) ◽  
pp. 1489-1496 ◽  
Author(s):  
Gareth Dyke ◽  
Xia Wang ◽  
Gary Kaiser
Keyword(s):  
British Columbia ◽  
Pacific Ocean ◽  
Late Cretaceous ◽  
Deep Water ◽  
Fossil Birds ◽  
Size Classes ◽  
Eastern Margin ◽  
The Pacific ◽  
The Pacific Ocean

Few fossil birds and non-avian dinosaurs are known from Mesozoic sediments bordering the eastern margin of the Pacific Ocean. Here, we describe additional remains of Late Cretaceous birds from a deep-water marine turbidite sequence of the Northumberland Formation exposed on Hornby Island, British Columbia. The bones described here are referable (based on hypothesized autapomorphies) to the Cretaceous avian lineages Enantiornithes and Ornithurae and fall into at least two size classes within either lineage. This suggests the presence of multiple taxa occurring within the Northumberland Formation.

Portaratrum, a new genus of deep-sea Tanaidacea (Crustacea) with description of two new species

Zootaxa ◽  
2003 ◽  
Vol 282 (1) ◽  
pp. 1 ◽  
Author(s):  
JÜRGEN GUERRERO-KOMMRITZ
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Atlantic Ocean ◽  
Deep Sea ◽  
New Genus ◽  
The Pacific ◽  
The Family ◽  
Two New Species ◽  
The Pacific Ocean

A new genus, Portaratrum n. gen. and two new species, one from the Atlantic Ocean and one from the Pacific Ocean are described. The new genus is characterized by a downwardly directed pleonal spur, cheliped basis fused to the cephalothorax, biramous uropods, pars molaris blunt with several terminal spinules. At present the genus is assigned to the family Colletteidae. Both species were collected from depths exceeding 4000 m.

Description of a new species of Trichogypsiidae (Porifera, Calcarea) and first record of the genus in the Pacific Ocean

Zootaxa ◽  
2017 ◽  
Vol 4312 (2) ◽  
pp. 394 ◽  
Author(s):  
HELMUT LEHNERT ◽  
ROBERT P. STONE
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
North Pacific Ocean ◽  
Gulf Of Alaska ◽  
First Record ◽  
The North ◽  
The Pacific ◽  
The Family ◽  
The Pacific Ocean ◽  
A New Species

A new species of Trichogypsiidae is described and compared to its congeners. Trichogypsia alaskensis n. sp. represents the fifth species of the family and with this record all three genera of the family are now represented in the North Pacific Ocean. Calcarea are rare in the Gulf of Alaska but with this new record the number of confirmed species rises from two to three. The new species has larger diactines of a broader size range and with a different pattern of spination than all congeners. 

Ginkgophytes of the Ul’ya flora (the Ul’ya depresiion, the Okhotsk-Chukotka volcanogenic belt)

Palaeobotany ◽  
2016 ◽  
Vol 7 ◽  
pp. 80-95 ◽  
Author(s):  
L. B. Golovneva
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Middle Part ◽  
Leaf Length ◽  
Volcanogenic Belt ◽  
Short Shoots ◽  
Volcanogenic Deposits

The Ul’ya flora comes from the Coniacian volcanogenic deposits of the Amka Formation (the Ul'ya depression, southern part of the Okhotsk-Chukotka volcanogenic belt). Ginkgoaleans are diverse in this flora and represented by three genera: Ginkgo, Sphenobaiera and Baiera. All specimens have no cuticle and were assigned to morphotaxa. Genus Ginkgo includes two species: G. ex gr. adiantoides (Ung.) Heer with entire leaves and G. ex gr. sibirica Heer with dissected leaves. Genus Sphenobaiera also consists of two species: S. ex gr. longifolia (Pom.) Florin with 4–8 leaf lobes and S. ex gr. biloba Prynada with two leaf lobes. Genus Baiera is represented by new species B. lebedevii Golovn., sp. nov.Leaves of this species are 25–30 cm long and 13–16 cm wide, narrowly wedge-shaped with flat slender petiole, dichotomously dissected 4–5 times into linear segments 3–6 mm wide with 6–12 veins. The length of ultimate segments is equal to about a half of leaf length. Leaves attached spirally to ovoid short shoots about 2 cm long. Among the Late Cretaceous floras similar diversity of ginkgoaleans was recorded only in the Turonian-Coniacian Arman flora from middle part of the Okhotsk-Chukotka volcanogenic belt (Herman et al., 2016). Four species of ginkgoaleans from the Ul’ya flora (except G. ex gr. adiantoides) are considered as the Early Cretaceous relicts.

scholarly journals Two new species of Microcotyle (Monogenea: Microcotylidae) on intertidal fish from the south Pacific coast

2020 ◽  
Vol 54 (3) ◽  
pp. 283
Author(s):  
Gabriela Muñoz ◽  
Mario George-Nascimento
Keyword(s):  
New Species ◽  
Pacific Coast ◽  
Valid Species ◽  
Base Pairs ◽  
Central Chile ◽  
South Central ◽  
The Pacific ◽  
The Family ◽  
Two New Species ◽  
Intertidal Fish

Microcotyle is one of the most diverse and controversial genera within the family Microcotylidae. To date, 131 species have been described in Microcotyle; however, more than half have been transferred to other genera, and several others have poor descriptions. Therefore, less than half of all Microcotyle species may be considered valid. In Chile, two species have been recognized, and unidentified Microcotyle have been found on several littoral fish, but there has been no effort to properly identify them. In this study, two new species of Microcotyle are taxonomically described from intertidal fish of the central (33°S) and south-central (36°S) regions of Chile. In this study, Microcotyle sprostonae n. sp. (collected mainly from Scartichthys viridis in central Chile) and M. chilensis n. sp. (collected mainly from Calliclinus geniguttatus in south-central Chile) were identified based on morphological and molecular analyses (ITS2 and 18S genes). Both species of Microcotyle principally differed from one another and from other valid species in the number of testes and clamps. The two new species also differed from one another by one base pair in the ITS2 and 18S genes and differed from other species of Microcotyle by several base pairs of both genes. Intertidal fish are mostly endemic to the Pacific coast of South America, and they have a limited geographical distribution that does not overlap with the type hosts of other Microcotyle species. Therefore, the two new species described here are distinguished from other congeneric species by morphological, genetic, and biological characteristics.

First record of Alternatipathes bipinnata (Cnidaria: Antipatharia) in the Southern Hemisphere

Zootaxa ◽  
2017 ◽  
Vol 4312 (1) ◽  
pp. 189 ◽  
Author(s):  
JUAN FRANCISCO ARAYA ◽  
JUAN ANTONIO ALIAGA ◽  
DENNIS OPRESKO
Keyword(s):  
Southern Hemisphere ◽  
Deep Water ◽  
First Record ◽  
Transverse Diameter ◽  
Northern Mexico ◽  
Southeastern Pacific ◽  
Deep Waters ◽  
The Pacific ◽  
The Family ◽  
Eleven Species

Antipatharians are still poorly documented in the southeastern Pacific, with just eleven species reported in Chilean waters, all of them distributed in subtidal areas from 70 to 2000 m depth (Häussermann & Försterra, 2007; Cañete & Häussermann, 2012; Araya et al. 2016a). Among the family Schizopathidae Brook, 1889, which is characterized by polyps elongated in the direction of the axis and having a transverse diameter of 2 mm or more (Opresko, 2002), the recently described deep-water genus Alternatipathes Molodtsova & Opresko, 2017, encompasses two recognized species, Alternatipathes alternata (Brook, 1889), reported from abyssal basins (2670 to 5089 m depth) of the Indian and Pacific Oceans, and Alternatipathes bipinnata (Opresko, 2005), known from a few specimens collected in deep waters (1130 to 2846 m) off the Pacific coasts of northern Mexico and southern USA (Opresko, 2005; Molodtsova & Opresko, 2017). 

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