Cookies Policy

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


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 A new genus, Arrama, and two new species, A. tandani and A, cordata, belonging to the copepod family Caligidae (Siphonostomatoida), are described from the gill filaments of two species of plotosid catfishes, Cnidoglanis macrocephalus (Valenciennes) and an undescribed species of Paraplotosus, respectively, from Australia. The new genus can be distinguished from confamilial genera by a combination of characters that include (1) the reduced apical armature of the leg 1 exopod, (2) the 2-segmented rami of leg 2, (3) the absence of the ventral apron of leg 3, and (4) the reduction of legs 3 and 4 to setiferous lobes. The two new species are distinguished from each other by the shape of the genital complex, the setae of the caudal ramus, the arrangement of spinules of the canna of the second maxilla, the apical armature of the leg 1 exopod, and the terminal armature of the leg 2 exopod. The morphology of the suckerlike cephalothorax of the members of the Caligidae appears to be an adaptation for attachment to smooth flat surfaces, i.e., external body surfaces, buccal cavity walls, and branchial chamber walls of the hosts. Two genera, Abasia and Hermilius, have become specialized for living on gill filaments of their hosts by modifications of their cephalothoraces. Although the ventral apron, a structure formed by the expansion of the intercoxal plate and sympod of leg 3, remains intact in these two genera, it may no longer be functional. Members of the new genus, Arrama, which also live on gill filaments, lack the ventral apron.

Affiliations: 1: (MD) Biology Laboratory, Hyperion Treatment Plant, 12000 Vista del Mar, Playa del Rey, California 90293; 2: (RFC) Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560.


Full text loading...


Data & Media loading...

Article metrics loading...



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