Title |
The ultrastructure of book lung development in the bark scorpion Centruroides gracilis (Scorpiones: Buthidae)
|
---|---|
Published in |
Frontiers in Zoology, July 2011
|
DOI | 10.1186/1742-9994-8-18 |
Pubmed ID | |
Authors |
Roger D Farley |
Abstract |
Near the end of the nineteenth century the hypothesis was presented for the homology of book lungs in arachnids and book gills in the horseshoe crab. Early studies with the light microscope showed that book gill lamellae are formed by outgrowth and possibly some invagination (infolding) of hypodermis (epithelium) from the posterior surface of opisthosomal limb buds. Scorpion book lungs are formed near the bilateral sites of earlier limb buds. Hypodermal invaginations in the ventral opisthosoma result in spiracles and sac-like cavities (atria). In early histological sections of embryo book lungs, widening of the atrial entrance of some lamellae (air channels, air sacs, saccules) was interpreted as an indication of invagination as hypothesized for book gill lamellae. The hypodermal infolding was thought to produce the many rows of lamellar precursor cells anterior to the atrium. The ultrastructure of scorpion book lung development is compared herein with earlier investigations of book gill formation. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Germany | 1 | 4% |
Brazil | 1 | 4% |
Unknown | 26 | 93% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 6 | 21% |
Student > Bachelor | 5 | 18% |
Student > Ph. D. Student | 4 | 14% |
Student > Master | 4 | 14% |
Lecturer > Senior Lecturer | 2 | 7% |
Other | 4 | 14% |
Unknown | 3 | 11% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 20 | 71% |
Biochemistry, Genetics and Molecular Biology | 2 | 7% |
Arts and Humanities | 1 | 4% |
Earth and Planetary Sciences | 1 | 4% |
Chemistry | 1 | 4% |
Other | 0 | 0% |
Unknown | 3 | 11% |