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

FUNCTIONAL MORPHOLOGY OF THE MOUTHPARTS OF JUVENILE LOBSTERS, HOMARUS AMERICANUS (DECAPODA: NEPHROPIDAE), AND COMPARISON WITH THE LARVAL STAGES

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.

This Article is currently unavailable for purchase.
Add to Favorites
You must be logged in to use this functionality

Cover image Placeholder

ABSTRACT The mouthparts of early juvenile (Stage VI) and one-year old (Stage XII) American lobsters, Homarus americanus (Decapoda: Nephropidae), were examined by scanning electron microscopy. This study describes the general morphology of all six pairs of mouthparts, as well as the types and distribution of setae they bear. In addition, it extends our understanding of the developmental sequence by providing an overview of changes from hatchling larvae (Stage I) through the first year (Stage XII). The general trends in the development of the mouthparts include an increase in overall size, an increase in the number of setae borne upon all surfaces and edges, and an increase in the size and number of spines, teeth, and denticles projecting from segments of the third and second maxillipeds and from the incisor and molar processes of the mandible. Furthermore, the cutting edge of the mandible changes dramatically as the individual teeth increase in size and coalesce. A molar process appears on the inner surface of the mandible by Stage VI, although its function is not clear. The types of setae borne upon each mouthpart are catalogued and analyzed for changes throughout the developmental sequence, from the larval stages to Stage XII lobsters. The possibility that certain setae might be precursors for other types is considered. The functions of setal types are also discussed and include chemo- and mechanoreception, grooming, manipulation of food, filtering of particles, and creation of water currents. Finally, possible functions of the mouthparts are discussed in light of their structure.

Affiliations: 1: (KLL) Boston University Marine Program, Marine Biological Laboratory, Woods Hole, Massachusetts 02543 (Mailing address) Marine Science Center, Northeastern University, East Point, Nahant, Massachusetts 01908; 2: (JRF) Division of Natural Sciences, State University of New York at Purchase, Purchase, New York 10577, U.S.A.

10.1163/1937240X92X00364
/content/journals/10.1163/1937240x92x00364
dcterms_title,pub_keyword,dcterms_description,pub_author
10
5
Loading
Loading

Full text loading...

/content/journals/10.1163/1937240x92x00364
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.1163/1937240x92x00364
Loading

Article metrics loading...

/content/journals/10.1163/1937240x92x00364
2017-10-22

Sign-in

Can't access your account?
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation