Henricia ? venturana Durham & Roberts, 1948 Henricia ? venturana Durham & Roberts, 1948: 437, pl. 66 figs 1, 3. Remarks The unique holotype, from the Upper Cretaceous Chico Formation of the North Fork of Matilija Creek, Ventura County (California, USA), is contained in the palaeontological collections of the University of California. Part (number 4866B) and counterpart (4866A) show the abactinal and actinal surfaces, respectively. The type specimen is an external mould of a near-complete asteroid with moderately long, narrow arms and a small disc, which has lost the abactinal ossicles and exposes the ambulacrals on the abactinal surface. Unfortunately, parts of the moulds have been worn by erosion and few details are well preserved. ...
SYNOPSIS. Because of limited research, a generally accepted hypothesis has not emerged for the phylo...
Nearchaster spinosus (Blake, 1973) comb. nov. Mistia spinosa Blake, 1973: 48, pl. 16 figs 30–44, ...
Astropecten montalionis (Echinodermata: Asteroidea: Astropectinidae) was first described by Giuseppe...
Fossils assigned to the predominantly deep-sea asteroid family Benthopectinidae Verrill, 1894 are de...
Fig. 16. A–C. Alkaidia sumralli Blake & Reid, 1998 (NHMUK EE15225). A–B. Abactinal (A) and actinal (...
Fig. 3. A–C. Terminology used for adambulacrals and orals in the present paper. A. Actinal view of a...
Fig. 5 (next page). A, E, I–K. Cheiraster gazellae Studer, 1883 (A.S. Gale collection, unregistered)...
Chrispaulia wrightorum sp. nov. urn:lsid:zoobank.org:act: DC13434F-62E3-47A9-9F62-327F77141670 Fi...
Fig. 4 (next page). A, D, J–M, O–P, S–W, Z. Pontaster tenuispinus (von Düben & Koren, 1846), Recent ...
muricata Verrill, 1867, Coscinasterias (Fig. 22) Coscinasterias muricata Verrill, 1867: 249. — C...
Fig. 6 (next page). A–B, F.? Benthopectinidae. A–B. Inferomarginals, in lateral aspect (MHI 2183/7, ...
Plesiastropecten hallovensis Peyer, 1944 Fig. 14 Plesiastropecten hallovensis Peyer, 1944: 320, ...
parva Koehler, 1912, Cribrella Cribrella parva Koehler, 1912: 152; 1912a: 40, pl. 4, figs 3, 8. ...
Fig. 7 (next page). A–J. Jurapecten infrajurensis sp. nov., various ossicle types (paratypes). A, H....
FIG. 16. — Asterias granifera Lamarck, 1816: A, B, abactinal (A) and actinal (B) surfaces; C, arm sh...
SYNOPSIS. Because of limited research, a generally accepted hypothesis has not emerged for the phylo...
Nearchaster spinosus (Blake, 1973) comb. nov. Mistia spinosa Blake, 1973: 48, pl. 16 figs 30–44, ...
Astropecten montalionis (Echinodermata: Asteroidea: Astropectinidae) was first described by Giuseppe...
Fossils assigned to the predominantly deep-sea asteroid family Benthopectinidae Verrill, 1894 are de...
Fig. 16. A–C. Alkaidia sumralli Blake & Reid, 1998 (NHMUK EE15225). A–B. Abactinal (A) and actinal (...
Fig. 3. A–C. Terminology used for adambulacrals and orals in the present paper. A. Actinal view of a...
Fig. 5 (next page). A, E, I–K. Cheiraster gazellae Studer, 1883 (A.S. Gale collection, unregistered)...
Chrispaulia wrightorum sp. nov. urn:lsid:zoobank.org:act: DC13434F-62E3-47A9-9F62-327F77141670 Fi...
Fig. 4 (next page). A, D, J–M, O–P, S–W, Z. Pontaster tenuispinus (von Düben & Koren, 1846), Recent ...
muricata Verrill, 1867, Coscinasterias (Fig. 22) Coscinasterias muricata Verrill, 1867: 249. — C...
Fig. 6 (next page). A–B, F.? Benthopectinidae. A–B. Inferomarginals, in lateral aspect (MHI 2183/7, ...
Plesiastropecten hallovensis Peyer, 1944 Fig. 14 Plesiastropecten hallovensis Peyer, 1944: 320, ...
parva Koehler, 1912, Cribrella Cribrella parva Koehler, 1912: 152; 1912a: 40, pl. 4, figs 3, 8. ...
Fig. 7 (next page). A–J. Jurapecten infrajurensis sp. nov., various ossicle types (paratypes). A, H....
FIG. 16. — Asterias granifera Lamarck, 1816: A, B, abactinal (A) and actinal (B) surfaces; C, arm sh...
SYNOPSIS. Because of limited research, a generally accepted hypothesis has not emerged for the phylo...
Nearchaster spinosus (Blake, 1973) comb. nov. Mistia spinosa Blake, 1973: 48, pl. 16 figs 30–44, ...
Astropecten montalionis (Echinodermata: Asteroidea: Astropectinidae) was first described by Giuseppe...