| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Sericoidea craigensis
Taxonomy
Plectambonites sericea craigensis was named by Reed (1917) [= Leptaena sericea, Sowerby, Davidson 1883 (pars), Mon. Brit. Foss. Brack., vol. v, Silur. Suppl., p. 227
Lectotypes designated by Cocks (1978).]. Its type specimen is B 73524 and is a 3D body fossil.
It was recombined as Leptelloidea craigensis by Jones (1928); it was recombined as Chonetoidea (Aegiria) craigensis by Reed (1935); it was synonymized subjectively with Sericoidea restricta by Williams (1962); it was recombined as Sericoidea craigensis by Candela (2011).
It was recombined as Leptelloidea craigensis by Jones (1928); it was recombined as Chonetoidea (Aegiria) craigensis by Reed (1935); it was synonymized subjectively with Sericoidea restricta by Williams (1962); it was recombined as Sericoidea craigensis by Candela (2011).
Synonyms
|
Synonymy list
| Year | Name and author |
|---|---|
| 1917 | Plectambonites sericea craigensis Reed pp. 883 - 884 figs. pl. xv, figs. 12-17 |
| 1928 | Leptelloidea craigensis Jones p. 496 |
| 1935 | Chonetoidea (Aegiria) craigensis Reed p. 343 |
| 1957 | Chonetoidea gamma Spjeldnaes pp. 106 - 107 figs. Pl. 2, figs. 12-13, textfig. 24C |
| 1984 | Sericoidea gamma Harper et al. p. 305 figs. 6B, E–J |
| 2011 | Sericoidea craigensis Candela p. 509 fig. 6K–O |
Is something missing? Join the Paleobiology Database and enter the data
|
|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Sericoidea craigensis Reed 1917
show all | hide all
Invalid names: Sericoidea gamma Spjeldnaes 1957 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. R. C. Reed 1917 | Shell semicircular, plano-convex, compressed, flattened, widest along hinge-line, cardinal angles subacute at 60°-75°, slightly alate, pointed. Pedicle-valve very slightly convex, most so along middle ; beak small, acute, not swollen, scarcely projecting, very slightly incurved ; hinge-area very narrow, steeply inclined to plane of valve ; interior with pair of very small short divergent triangular diductors about one-fifth the length of valve. Brachial valve flat or very slightly concave ; beak inconspicuous ; interior with large subflabellate divergent muscle-scars about one-third to one-half the length of valve, with thickened crinkled anterior margins, and each muscle-scar divided by narrow radial ridge into anterior and posterior adductor. Surface of valves ornamented with 12-16 unusually strong straight primary radii, generally equidistant, with a shorter secondary one in each interspace and 3-5 finer thread-like lines between. Interiors with coarse pustules radially arranged along the lines. | |
| N. Spjeldnaes 1957 (Chonetoidea gamma) | Chonetoidea species with strong ventral muscle impressions,
small, regular branchial arches with some few spines in the marginal parts of the dorsal interior, and a differentiated sculpture. | |
| Y. Candela 2011 | Ornament unequally parvicostellate, consisting in 11 costellae permmat the 2mmgrowth stage; four to five costellae per sector; five primary costae originate at the umbo. Dorsal interior with septule signature one ms + one pair of sms + five pairs of septules disposed in one single row; a second row is rarely developed with no more than five septules; anterior end of median septum extending for 40% of valve length; median septum 25% as long as valve length; arc 40% as long as wide, developed in the posterior half of the valve floor. |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|
||||
| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: base of the Longvillian to the top of the Rakvere or 457.20000 to 450.50000 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sandbian | Norway | Chonetoidea gamma (164362) | |
| Longvillian - Marshbrookian | Norway (Oslo) | Sericoidea gamma (166799 166800 166801 166802 166803 166804 166805) | |
| Oandu - Rakvere | Norway (Asker) | Chonetoidea gamma (194774) |