The Fossil Cypraeidae of the Fruitville Member (Unit 2) and Kissimmee River Valley Equivalent, Tamiami Formation of Southern Florida: (Mollusca: Gastropoda: Cypraeidae)

The Festivus ◽  
2020 ◽  
Vol 52 (2) ◽  
pp. 146-153
Author(s):  
John Daughenbaugh

Unit 2 was the last member of the Tamiami Formation of the Late Piacenzian Pliocene. Its ending signaled the commencement of a two stage extinction event. The first stage wounding event resulted in the disappearance of the Akleistostoma (Gardner, 1948), Calusacypraea (Petuch, 1996) and Pseudadusta (Petuch, 2004) genera and the end of the Tamiami Formation.

The Festivus ◽  
2021 ◽  
Vol 53 (1) ◽  
pp. 3-8
Author(s):  
Edward Petuch ◽  
David Berschauer

Two new fossil Helmet Shells of the genus Cassis Scopoli, 1777 (Cassidae) and a new fossil Grinning Tun Shell of the genus Malea Valenciennes, 1832 (Tonnidae) are described from the Pliocene and Pleistocene fossil beds of southern Florida. The new Helmet Shells, Cassis rasae n. sp. and Cassis viliusi n. sp., were both collected in the rich fossil beds of the Holey Land Member of the Bermont Formation (Calabrian Stage, Early Pleistocene) and the new Grinning Tun, Malea hyaducki n. sp., was collected in the Fruitville Member (Kissimmee River Valley equivalent beds) of the Tamiami Formation (late Piacenzian Stage of the Pliocene). The discovery of two new large Helmet Shells in the Holey Land Member demonstrates that four species of Cassis are present in the Bermont Formation, making this the single largest fossil Cassis fauna found anywhere on Earth. The new Grinning Tun represents the oldest-known Malea found in Florida, and is the direct ancestor of the Gelasian Pleistocene Malea springi (Caloosahatchee Formation) and the Calabrian Pleistocene Malea petiti (Bermont Formation).


The Festivus ◽  
2020 ◽  
Vol 52 (1) ◽  
pp. 77-85
Author(s):  
John Daughenbaugh

Four species of the Pahayokea (Gardnericypraea) Petuch and Drolshagen, 2011 subgenus are reclassified as Akleistostoma (Gardnericypraea) subgenus species. This represents a continuation of geographically separate, but parallel, evolutionary tracks throughout the Piacenzian Pliocene Tamiami Formation


The Festivus ◽  
2019 ◽  
Vol 51 (2) ◽  
pp. 125-132
Author(s):  
John Daughenbaugh

Following the disappearance of the seven Buckingham Member (Unit 10) Cypraeidae from the Myakka Lagoon System (Myakka), there was a hiatus represented by two strata at Sarasota (Pinecrest Members 9 & 8) in the early Piacenzian Pliocene, 3.6 million years ago (“mya”), from which no Cypraeidae have been recorded. This was followed by the warmest and most tropical conditions of the entire Pliocene. The sea grass beds and mud flats, which were the preferred habitats of the Pinecrest Cypraeidae, returned in force. The depositional strata which resulted, Pinecrest (Unit 7) and its Kissimmee River Valley Equivalent, were very thick and probably represent a long period of uninterrupted deposition. Eight new species in six genera emerged in Myakka. In the Kissimmee River Valley (Kissimmee), six new species in three genera (one new) emerged as the first and earliest known Cypraeidae species from that area. This represented geographically separate, but parallel, evolutionary tracks. Pinecrest Members 6 & 5 represented a repeat of the conditions experienced during Pinecrest Members 9 & 8, resulting in the disappearance of all Pinecrest (Unit 7) Cypraeidae from Myakka and Kissimmee.


The Festivus ◽  
2019 ◽  
Vol 51 (4) ◽  
pp. 273-283
Author(s):  
John Daughenbaugh

The disappearance of all Pinecrest and equivalent Cypraeidae species from most of their habitats was caused by the circa 200,000 year cooling period in the mid Piacenzian Pliocene, c. 3.2-3.0 mya, and the associated significantly lower sea levels and dry terrestrial conditions in southern Florida. The cooling period was followed by a warming period, which resulted in the Tamiami Subsea being flooded to its maximum size and produced wide-spread tropical conditions throughout southern Florida, roughly similar to today’s southwest Pacific. This resulted in the renewed radiation and speciation of the Cypraeidae populations. In the Myakka Lagoon System, the eight Pinecrest Member (Unit 7) Cypraeidae species in five genera were followed by ten new species in five genera which emerged in Fruitville (Unit 4) time. In the Kissimmee River Valley, the five Unit 7 equivalent species in three genera were followed by eight new species in three genera, which emerged in that area. The number of genera remains consistent at three with the only species previously assigned to Pseudadusta Petuch, 2004 placed into synonymy with Akleistotoma bairdi (Petuch, 2004). This represented a continuation of geographically separate, but parallel, evolutionary tracks.


1977 ◽  
Vol 9 (1) ◽  
pp. 107-113 ◽  
Author(s):  
John E. Reynolds ◽  
J. Richard Conner

In many areas of the country, there is strong competition among agricultural, municipal, industrial and other users of water. Water managers are faced with the problem of allocating available water among alternative uses.The study [11] upon which this paper is based was a cooperative effort with the Central and Southern Florida Control District which is typical of many water management districts making decisions regarding allocation of a limited amount of water among uses and users. When the District was formed, it was developed with emphasis on facilities to provide relief from flooding. Water management responsibilities such as water supply, recreation and the preservation and enhancement of fish and wildlife have become important to the public and consequently have received recognition by those responsible for managing the water.


The Festivus ◽  
2019 ◽  
Vol 51 (3) ◽  
pp. 237-245
Author(s):  
John Daughenbaugh

The first tropical hard corals, migrating from the Caribbean, established themselves along the rim of the Everglades Pseudoatoll in the mid to late Piacenzian Pliocene, 3.1-2.6 million years ago (hereinafter “mya”). The rim or perimeter delineated the pseudoatoll, a “U shaped” feature, open in the north, which ran east southeast from the Palm Beach Reef Tract through the Miami Beach Tract, curving to the southwest before linking with the Immokalee Reef Tract on the west coast of present day southern Florida. The pseudoatoll encompassed a very large depressional lagoon. The coral and coralline facies have been designated the Golden Gate Member (Golden Gate) of the Tamiami Formation. The Lower, Middle, Upper and Uppermost beds are equivalent in time with the Pinecrest and the Fruitville Members of the Tamiami Formation, with the middle and upper layers thickest as the warming of southern Florida progressed to its maximum during Fruitville time. Nine Cypraeidae species in three genera have been recorded from the Golden Gate: one in the Lower beds, three in the Middle beds, three in the Upper beds and two in the Uppermost beds. The pseudoatoll corals, coral reefs and associated molluscan fauna became extinct as the result of a catastrophic extinction event caused by rapid and severe cooling during the Piacenzian Pliocene and Gelasian Pleistocene crossover period, circa 2.6 mya. This event also marks the end of the Tamiami Formation.


Author(s):  
Sengshiu Chung ◽  
Peggy Cebe

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.


2007 ◽  
Vol 177 (4S) ◽  
pp. 121-121
Author(s):  
Antonio Dessanti ◽  
Diego Falchetti ◽  
Marco Iannuccelli ◽  
Susanna Milianti ◽  
Gian P. Strusi ◽  
...  
Keyword(s):  

2007 ◽  
Vol 177 (4S) ◽  
pp. 120-120
Author(s):  
Pamela I. Ellsworth ◽  
Anthony Caldamone
Keyword(s):  

2005 ◽  
Vol 38 (18) ◽  
pp. 68
Author(s):  
SHARON WORCESTER
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document