The calanoid copepod genus Pleuromamma is easily distinguished from all other copepods by the presence of a rounded, dark-red cuticular structure ( = pigment knob) that protrudes from the left or right side of the second thoracic segment in both sexes. The present study of the pigment knob reveals a complex ultrastructure consisting of various cell types within three distinct areas that are bathed by hemolymph from the lateral sinus. The knob is covered by a greatly expanded cuticle through which a pore passes. The pore appears to connect with a centrally positioned pigment cell containing a large mass of darkly staining granules. This suggests that the knob may have a secretory function. Observations of live animals and dissected pigment knobs, however, indicates that the knob does not secrete a luminescent material nor does it luminesce internally.
Member of
Contributors
Publisher
John Wiley & Sons, Inc.
Date Issued
1988
Note
Language
Type
Genre
Extent
13 p.
Subject (Topical)
Identifier
3342281
Additional Information
The calanoid copepod genus Pleuromamma is easily distinguished from all other copepods by the presence of a rounded, dark-red cuticular structure ( = pigment knob) that protrudes from the left or right side of the second thoracic segment in both sexes. The present study of the pigment knob reveals a complex ultrastructure consisting of various cell types within three distinct areas that are bathed by hemolymph from the lateral sinus. The knob is covered by a greatly expanded cuticle through which a pore passes. The pore appears to connect with a centrally positioned pigment cell containing a large mass of darkly staining granules. This suggests that the knob may have a secretory function. Observations of live animals and dissected pigment knobs, however, indicates that the knob does not secrete a luminescent material nor does it luminesce internally.
This manuscript is an author version with the final publication available at http://www.wiley.com/WileyCDA/ and may be cited as: Blades-Eckelbarger, P. I., & Youngbluth, M. J. (1988). The ultrastructure of the
Florida Atlantic University. Harbor Branch Oceanographic Institute contribution #628.
Date Backup
1988
Date Text
1988
DOI
10.1002/jmor.1051970306
Date Issued (EDTF)
1988
Extension
FAU
FAU
admin_unit="FAU01", ingest_id="ing12915", creator="creator:BCHANG", creation_date="2012-06-15 13:53:19", modified_by="super:FAUDIG", modification_date="2014-02-13 15:11:51"
IID
FADT3342281
Issuance
single unit
Person Preferred Name
Blades-Eckelbarger, Pamela I.
creator
Physical Description
13 p.
Title Plain
The ultrastructure of the "pigment knob" on Pleuromamma spp. (Copepoda: Calanoida)
Origin Information
John Wiley & Sons, Inc.
1988
single unit
Title
The ultrastructure of the "pigment knob" on Pleuromamma spp. (Copepoda: Calanoida)
Other Title Info
The ultrastructure of the "pigment knob" on Pleuromamma spp. (Copepoda: Calanoida)