The Central American Squirrel Monkey (Saimiri oerstedii): Introduced Hybrid or Endemic Species?

2000 ◽  
Vol 16 (3) ◽  
pp. 350-365 ◽  
Author(s):  
Susan Cropp ◽  
Sue Boinski
2012 ◽  
Vol 34 (1) ◽  
pp. 86-98 ◽  
Author(s):  
Mary E. Blair ◽  
Gustavo A. Gutierrez-Espeleta ◽  
Don J. Melnick

Oryx ◽  
1998 ◽  
Vol 32 (1) ◽  
pp. 45-58 ◽  
Author(s):  
Sue Boinski ◽  
Katharine Jack ◽  
Craig Lamarsh ◽  
Jessica A. Coltrane

Central American squirrel monkeys Saimiri oerstedii are limited to Costa Rica and Panama, and have never been abundant. The Costa Rican population is now decimated. Based on our survey of squirrel monkeys throughout a large portion of the Costa Rican range of this species in 1996, we can confirm that at least 1246 squirrel monkeys remain in 26 spatially dispersed localities. Despite probable undercounts of squirrel monkeys within sites and potentially missed localities, the total population size should be considered far below a size that would provide longterm genetic viability. Deforestation and habitat fragmentation spurred by agricultural and tourism development are the familiar culprits contributing to this decline. Our strong recommendation is that future conservation efforts be targeted at the level of each specific locality, perhaps recruiting local, national and international sponsors. A focused strategy would allow management efforts to be tailored to the circumstances specific to each site and thus allocate scarce resources more efficiently.


Phytotaxa ◽  
2019 ◽  
Vol 388 (1) ◽  
pp. 1
Author(s):  
LEONARDO O. ALVARADO-CÁRDENAS ◽  
LUCIO LOZADA-PÉREZ ◽  
JOSELIN CADENA R. ◽  
SOFIA ISLAS-HERNÁNDEZ ◽  
C. RAMIRO MARTÍNEZ-GONZÁLEZ ◽  
...  

In this study, we update the systematics of the Tabernaemontana and describe the general patterns of species diversity and conservation status in Mexico. A total of 18 species were registered, including one cultivated species, two new species described here (T. chamelensis L.O. Alvarado & Lozada-Pérez and T. ochoterenae L.O. Alvarado & S. Islas), and eight species endemic to Mexico, which in total represents 47% of the diversity of the genus in the country. The states of Chiapas, Oaxaca, and Veracruz had the highest species diversity in native and endemic species. A map based on the kriging approach and the sums of species distribution models corroborate the sites of high diversity. A comparison among American countries showed that Central American countries share more specific similarity than South American ones. A risk evaluation showed that six species are under threat, mainly the endemic species. This exercise demonstrated that this genus is an interesting model to understand the biogeography, evolution, and affinities of the tropical flora of the Americas. Our work provides a basis for a deeper study of the biogeography and biology of the members of genus Tabernaemontana.


2019 ◽  
Vol 237 ◽  
pp. 41-49
Author(s):  
Gerardo Ceballos ◽  
Paul R. Ehrlich ◽  
Jesus Pacheco ◽  
Natalia Valverde-Zúñiga ◽  
Gretchen C. Daily

1988 ◽  
Vol 62 (03) ◽  
pp. 419-423 ◽  
Author(s):  
Baba Senowbari-Daryan ◽  
George D. Stanley

Two Upper Triassic sphinctozoan sponges of the family Sebargasiidae were recovered from silicified residues collected in Hells Canyon, Oregon. These sponges areAmblysiphonellacf.A. steinmanni(Haas), known from the Tethys region, andColospongia whalenin. sp., an endemic species. The latter sponge was placed in the superfamily Porata by Seilacher (1962). The presence of well-preserved cribrate plates in this sponge, in addition to pores of the chamber walls, is a unique condition never before reported in any porate sphinctozoans. Aporate counterparts known primarily from the Triassic Alps have similar cribrate plates but lack the pores in the chamber walls. The sponges from Hells Canyon are associated with abundant bivalves and corals of marked Tethyan affinities and come from a displaced terrane known as the Wallowa Terrane. It was a tropical island arc, suspected to have paleogeographic relationships with Wrangellia; however, these sponges have not yet been found in any other Cordilleran terrane.


1988 ◽  
Vol 62 (01) ◽  
pp. 126-132 ◽  
Author(s):  
Douglas S. Jones ◽  
Roger W. Portell

Whole body asteroid fossils are rare in the geologic record and previously unreported from the Cenozoic of Florida. However, specimens of the extant species,Heliaster microbrachiusXantus, were recently discovered in upper Pliocene deposits. This marks the first reported fossil occurrence of the monogeneric Heliasteridae, a group today confined to the eastern Pacific. This discovery provides further non-molluscan evidence of the close similarities between the Neogene marine fauna of Florida and the modern fauna of the eastern Pacific. The extinction of the heliasters in the western Atlantic is consistent with the pattern of many other marine groups in the region which suffered impoverishment following uplift of the Central American isthmus.


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