Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Clawed Lobster (Nephropidae) Diversity Through Time

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Journal of Crustacean Biology

Abstract Clawed lobster diversity through time [Lower Cretaceous (Valanginian)–Recent] is compiled and interpreted herein. Species diversity trends are evaluated using raw numbers of species per geologic time unit (period, age) and also by using a variety of species-numbers normalization factors that address sampling biases. Species numbers are normalized for: 1) duration of time intervals (periods), 2) sedimentary rock exposure area per time intervals (periods), and 3) area under the Vail et al. (1978) sea-level curve (ages). The Vail curve method, new herein, normalizes for marginal/epicontinental sea coverage per age. By any measure; i.e., raw or normalized data, and over any time interval considered, shallow-dwelling (shelf depth) lobsters were significantly more diverse in the Cretaceous than in the Tertiary (e.g., 53 Cretaceous species vs. 16 Tertiary species, raw count; 18 Tertiary species if normalized for duration). Reduction in Tertiary lobster diversity seems due, in part, to mass extinction at the K/T boundary. However, lobster diversity rebounds in the Eocene, and it seems apparent that lower diversity of Tertiary lobsters is due more to post-Paleocene events than to K/T boundary events. The reduction in Tertiary fossil diversity seems largely explained by the lobsters' general abandonment of shelf depths in the Tertiary (ca. late Eocene–early Oligocene). Deep-dwelling lobsters are seldom collected as fossils, and their diversity history will never be known, but it seems clear that shelf-dwelling lobsters were significantly more diverse in the Cretaceous.

Affiliations: 1: Department of Geosciences, Edinboro University of Pennsylvania, Edinboro, Pennsylvania 16444, U.S.A. ( dtshudy@edinboro.edu)

Loading

Full text loading...

/content/journals/10.1163/20021975-99990325
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.1163/20021975-99990325
Loading

Article metrics loading...

/content/journals/10.1163/20021975-99990325
2003-01-01
2016-12-06

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
     
    Journal of Crustacean Biology — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation