| PUBLICATION |
|
Edit Publication
Add/Edit Sample
Sample List |
|
Authors: |
Rigby, J. Keith
,
Blodgett, Robert B.
|
| Editors: |
|
| Date: |
/1983 |
| Title: |
Early Middle Devonian sponges fro the McGrath quadrangle of west-central Alaska |
|
57 , 4 , 773-786 , 4 figs. |
| Host: |
Journal of Paleontology : |
| Document Type: |
Article\Abst.\Chapter\report |
| Annotation: |
Abstract--Silicified calcareous sphinctozoan sponges are reported from an early Middle Devonian limestone of the McGrath Quadrangle, in west-central Alaska, as the oldest species of that order yet described from North America. The new genus, Hormospongia, and the new species, H. labyrinthica, H. diarteria, and H. acara are characteristically beaded uniserial to branched sphinctozoans with porous walls and pseudosiphonate central openings. Species are differentiated using size of the sponge, canal patterns, and nature of the labyrinthine reticular filling of the chambers. |
| UserNote |
|
|
79RB4
(10060-SD)
, Mc Grath
, Long. 155 deg. 07'05"W., Lat. 62 deg. 04'03"N. NE1/4, SW1/4, NW1/4, SE1/4 sec. 22, T23N, R32W. Silicified fossils recovered from talus of limestone scree slope on west side of southeastward flowing stream in section 22. (description from Rigby and Blodgett, 1983, p. 774)
|
|
|
Hormospongia labyrinthica n. sp.
|
|
|
|
|
|
79RB8
(10061-SD)
, Mc Grath
, Long. 155 deg. 09'23"W, Lat. 62 deg. 04'33"N. NE1/4, NW 1/4, NE1/4, NW1/4 sec. 21, T23N, R32W. Approximately 3.0 m (10 ft) thick silicified fossil horizon, the top of which is 101.5 m (333 ft) below the top of the Cheeneetnuk Limestone. (description from Rigby and Blodgett, 1983, p. 774)
|
|
|
Hormospongia labyrinthica n. sp.
|
|
|
|
Hormospongia diarteria n. sp.
|
|
|
|
Hormospongia acara n. sp.
|
|
|
|
|
|
79RB9
(10062-SD)
, Mc Grath
, Long. 155 deg. 09'23"W, Lat. 62 deg. 04'33"N. NE1/4, NW1/4, NE1/4, NW1/4 sec. 21, T23N, R32W. Silicified fossil horizon, approximately 3.0 m (10 ft) thick, the top of which is 81.7 m (268 m) below the top of the Cheeneetnuk Limestone. (description from Rigby and Blodgett, 1983, p. 774)
|
|
|
Hormospongia labyrinthica n. sp.
|
|
|
|
Hormospongia diarteria n. sp.
|
|
|
|
|
|
|
|
79RB11
(10095-SD)
, Mc Grath
, Long. 155 deg. 09'25"W, Lat. 62 deg.04'40"N. NE1/4, SW1/4, SE1/4, SW1/4 sec. 16, T23N, R32W. Silicified fossil horizon, 25.3 (83 ft) below the top of the Cheeneetnuk Limestone. (description from Rigby and Blodgett, 1983, p. 774)
|
|
|
Hormospongia labyrinthica n. sp.
|
|
|
|
|
|
|