A new species of the oligopygoid echinoidHaimeafrom the lower Eocene of Baja California Sur, Mexico

1994 ◽  
Vol 68 (4) ◽  
pp. 846-851 ◽  
Author(s):  
Richard L. Squires ◽  
Robert A. Demetrion
Keyword(s):  
New Species ◽  
North America ◽  
Baja California ◽  
Middle Part ◽  
Baja California Sur ◽  
Lower Eocene ◽  
Shallow Marine ◽  
First Occurrence ◽  
A New Species

The oligopygoid echinoidHaimea bajasurensisn. sp. is described from middle lower Eocene (”Capay Stage”) shallow-marine sandstones in the middle part of the Bateque Formation and shallow-marine limestones in the upper part of the Tepetate Formation, Baja California Sur, Mexico. The new species is both the earliest and the westernmost oligopygoid, and the first occurrence ofHaimeain North America.

A new genus of cassiduloid echinoid from the lower Eocene of the Pacific coast of western North America and a new report of Cassidulus ellipticus Kew, 1920, from the lower Eocene of Baja California Sur, Mexico

1995 ◽  
Vol 69 (3) ◽  
pp. 509-515 ◽  
Author(s):  
Richard L. Squires ◽  
Robert A. Demetrion
Keyword(s):  
North America ◽  
New Genus ◽  
Baja California ◽  
Pacific Coast ◽  
Middle Part ◽  
Baja California Sur ◽  
Western North America ◽  
Lower Eocene ◽  
Shallow Marine ◽  
The Pacific

The cassiduloid echinoid Calilampas californiensis n. gen. and sp. is described from middle lower Eocene (“Capay Stage”) shallow-marine sandstones in both the middle part of the Bateque Formation, Baja California Sur, Mexico, and the lower part of the Llajas Formation, southern California. The new genus is tentatively placed in family Pliolampadidae. The cassiduloid Cassidulus ellipticus Kew, 1920, previously known only from the “Capay Stage” in California, is also present in “Capay Stage” shallow-marine sandstones of the Bateque Formation.

New early Eocene marine gastropods from Baja California Sur, Mexico

1990 ◽  
Vol 64 (1) ◽  
pp. 99-103 ◽  
Author(s):  
Richard L. Squires ◽  
Robert Demetrion
Keyword(s):  
North America ◽  
West Coast ◽  
Baja California ◽  
Western Hemisphere ◽  
Baja California Sur ◽  
The West ◽  
Lower Eocene ◽  
Marine Gastropods ◽  
First Occurrence ◽  
Molluscan Fauna

Three gastropod species are described from a previously unknown shallow-marine molluscan fauna in the lower Eocene Bateque Formation, southwest of San Ignacio, Baja California Sur, Mexico. Velates batequensis n. sp., a commonly occurring neritid in the Bateque, is the only ribbed Velates known from the Western Hemisphere. The fairly rare Platyoptera pacifica n. sp. is the earliest record of this strombid genus and its first occurrence on the west coast of North America. The very rare Cypraedia sp. is also the first occurrence of this cypraeid-like genus on the west coast of North America.

A new species of the clypeasteroid echinoid Astrodapsis from the Miocene Isidro Formation, Baja California Sur, Mexico

1993 ◽  
Vol 67 (2) ◽  
pp. 258-263 ◽  
Author(s):  
Richard L. Squires ◽  
Robert A. Demetrion
Keyword(s):  
New Species ◽  
Middle Miocene ◽  
Baja California ◽  
Pacific Coast ◽  
Baja California Sur ◽  
Southern Limit ◽  
North Central ◽  
The Pacific ◽  
First Occurrence ◽  
A New Species

The clypeasteroid echinoid Astrodapsis bajasurensis n. sp. is described from upper middle Miocene beds of the Isidro Formation near the mouth of Arroyo Mezquital on the Pacific coast of north-central Baja California Sur, Mexico. The new species is the first occurrence of Astrodapsis outside of California and extends the southern limit of the genus by 1,100 km.

Mytiloides hattini n. sp.: a guide fossil for the base of the Turonian in the Western Interior of North America

1991 ◽  
Vol 65 (2) ◽  
pp. 234-241 ◽  
Author(s):  
William P. Elder
Keyword(s):  
New Species ◽  
North America ◽  
Western Europe ◽  
Upper Cretaceous ◽  
First Occurrence ◽  
A New Species ◽  
Stratigraphic Interval

Mytiloides hattini, a new species of inoceramid bivalve from the basal Turonian (Upper Cretaceous), is described and its stratigraphic importance discussed. This inoceramid is particularly significant because its first occurrence can be used as a marker for the base of the Turonian in strata that typically contain no ammonites and few other taxa. The lowest occurrence of Mytiloides hattini is characterized by abundant specimens over wide regions of the Western Interior of North America; this species also apparently occurs in the lowest Turonian strata of western Europe. The typical absence of ammonites in this stratigraphic interval potentially makes the first occurrence of Mytiloides hattini an important fossil for regional and intercontinental correlation of the Cenomanian–Turonian boundary.

A New Species of Marine Triclad Turbellarian of the Genus Sabussowia from Prince Edward Island

1973 ◽  
Vol 30 (3) ◽  
pp. 389-394 ◽  
Author(s):  
Ian R. Ball
Keyword(s):  
New Species ◽  
North America ◽  
Prince Edward Island ◽  
The Status ◽  
First Occurrence ◽  
Nomina Dubia ◽  
A New Species

A new species of marine triclad turbellarian, Sabussowia wilhelmii sp. nov., is described from the Pisquid River, Prince Edward Island, Canada. This represents the first occurrence of the genus and of the subfamily Cercyrinae of the Procerodidae in North America. The genus is discussed and a key to the known species is provided. A detailed discussion of the status of Vortex warreni of Girard and Procerodes warreni of Wilhelmi is given. The identity of the former cannot be ascertained. The latter could be a Sabussowia species, but, in the absence of fully mature material, this question cannot be resolved. Both names are regarded as nomina dubia, and the suppression of the genus Fovia of Girard is recommended.

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