Pamlico fossil echinoids

Description of two new fossil echinoids (Echinodermata: Echinoidea) from the Early Hauterivian (Early Cretaceous) of the Paris Basin (France)

Two new echinoid genera and species, Salvaster roberti gen. et sp. nov. and Pygolampas edita gen. et sp. nov. are described. They were collected in the Calcaires à Spatangues Formation (CSF) that consists of limestone and clay sediments deposited in the southeast of the Paris Basin (France) during the Early Hauterivian (Early Cretaceous). The CSF is dated from the Acanthodiscus radiatus chronoz...

A diverse assemblage of Permian echinoids (Echinodermata, Echinoidea) and implications for character evolution in early crown group echinoids

—The Permian is regarded as one of the most crucial intervals during echinoid evolution because crown group echinoids are first widely known from the Permian. New faunas provide important information regarding the diversity of echinoids during this significant interval as well as the morphological characterization of the earliest crown group and latest stem group echinoids. A new fauna from the...

Albemarle–Pamlico Sounds revealed and stated preference data

In this article we describe the contingent valuation and behavior methods scenario developed in the 1995 Albemarle-Pamlico Sounds Survey. The survey elicits revealed and stated preference recreation behavior data which are used to estimate the value of water quality improvements [4,8]. The survey elicits willingness to pay data which are used to conduct a split-sample scope test [7]. The data a...

Shoreline change within the albemarle-Pamlico eStuarine SyStem, north carolina

Comparative Aspects of Superficial Conduction Systems in Echinoids and Asteroids.

SYNOPSIS. The spine-convergence response of sea urchins and the papula (deimal branchia) retraction response of starfish persist after removal of the central nervous system, but are blocked by scratching through the skin. They are mediated therefore by diffuse superficial conduction systems capable of limited spread—to a few centimeters. The spine response does not bend around the ends of a cut...