Echinodermata 2

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Echinodermata - part 2
   
Class Ophiuroidea


Echin 33

Phylum Echinodermata
Subphylum Eleutherozoa
Superclass Cryptosyringida
Class Ophiuroidea
Order Ophiurida
Genus Ophiopinna
Species elegans

Brittle Star: Ophiopinna elegans

La Voulte, Ardeche, France
middle Jurassic (Callovian)

Pyrite replaced brittle stars (2 to 4 cm sizes) with the usual five slender, whip-like arms on natural shallow sea floor matrix (13.5 x 12.5 cm) from the famous middle Jurassic La Voulte-sur-Rhône collecting site in France

sold





Echin 13


Brittle Star: Ophiopinna elegans

Same phylogeny and location as above except the pyrite replaced brittle stars are slightly smaller
(1 to 2.5 cm sizes) with the usual five slender,
whip-like arms on a oblong piece of natural
shallow sea floor matrix (14.5 x 7 cm)

$ 350





Echin 3

Phylum Echinodermata
Class Ophiuroidea
Order Oegophiurida
Genus Bundenbachia
Species beneckei

Brittle Star: Bundenbachia benecki

Roofing slate (8 x 7.5 cm), Bundenbach,
Germany, early Devonian


A 2.5 x 2.5 cm pyrite replaced brittle star on black slate from Bundenbach, Germany; due to the wide rays, it almost appears to be a starfish, but is still a brittle star

$ 275
Class Echinoidea


Echin 2

Phylum Echinodermata
Class Echinoidea
Order Phymosomatoida
Genus Phymosoma
Species texanum

Sea Urchin: Phymosoma texanum

Comanche Peak Fm, Clifton, Texas
lower Cretaceous

2.5 x 2.5 cm

A “regular” sea urchin measuring 2.5 x 2.5 cm; has a pentaradial shape with the peristome on the lower, central surface and the periproct in the middle of the apical disc on the upper, central surface; small tubercles on sides of urchin are where articular spines were attached; beige color of specimen is darker than seen here

$ 50



Echin 4a


Phylum Echinodermata
Class Echinoidea
Order Spatangoida
Genus Lovenia

Sea Urchin:  Lovenia forbesi

Mannum, South Australia
Oligocene to lower Miocene

An “irregular” heart shaped sea urchin measuring 3 x 3 cm; periproct is located on the posterior flat edge of the test; follow the anterior ambulacral groove forward and under the test to the peristome (which is located closer to the center of the carapace than usual); the spine tubercles are quite unusual as they are recessed into the test surrounded by a circular “moat”

$ 20
 

Echin 4b

Sea Urchin:  Lovenia forbesi

This sea urchin has the same phylogeny and is
from the same location as above, slightly smaller
(2.5 x 2 cm) and with some natural iron staining


$ 10
   


Echin 5

Phylum Echinodermata
Class Echinoidea
Order Spatangoida
Family Hemiasteridae
Genus Hemiaster
Species whitei

Sea Urchin:  Hemiaster whitei

Ft. Worth Limestone Fm, Washita Grp., Kingston, Oklahoma, early Cretaceous

A “regular” sea urchin measuring 2.5 x 2 cm; has a pentaradial shape with the peristome on the lower, central surface and the periproct in the middle of the apical disc on the upper, central surface; the test looks almost smooth, but on closer inspection very small tubercles are present; this specimen is in near mint condition
 
$ 100
   


Echin 6a

Phylum Echinodermata
Class Echinoidea
Subclass Euechinoidea
Order Spatangoida
Genus Pliotoxaster
Species whitei

Sea Urchin:  Pliotoxaster whitei

Duck Creek Fm, Grayson County,
 Texas, Early Cretaceous

This is a “regular” sea urchin measuring 4 x 3.5 cm; a tiny chunk is missing from the side of this sea urchin, otherwise fine; it has a pentaradial shape with the peristome on the lower, central surface and the periproct in the middle of the apical disc on the upper, central surface; tubercles are slightly more prominent than in Hemiaster whitei

$ 30
 

Echin 6b

Sea Urchin:  Pliotoxaster whitei

This sea urchin has the same phylogeny and is
from the same location as above, slightly smaller
(2.5 x 2.5  cm) but it is better condition


$ 25
   

Echin 18

Phylum Echinodermata
Class Echinoidea
Subclass Euechinoidea
Order Spatangoida
Genus Eupatagus
Species antillarum

Sea Urchin: Eupatagus antillarium

Ocala Limestone, Yankeetown, Florida
Eocene

Specimen size: 5.5 x 4.5 cm; the test of the sea
urchin is well preserved; displaying the typical pentamerism; the test is composed of calcite and calcium carbonate, and is mainly cream colored; areas of slightly darker color noted; this species named for the limestone formation where found; the peristome can be distinguished on the oral (ventral) surface;

raised tubercles are distinct where the spines originally attached; the ambulacral grooves are marked by rows of slits with definite individual foramina on each side of every slit through which the tube feet projected; plastron is very prominent

$ 30





Echin 19a

Phylum Echinodermata
Class Echinoidea
Order Spatangoida
Family Eupatagidae
Genera Eupatagus

Sea Urchin:  Eupatagus ocalanus

Ocala limestone, Ocala, Florida, Eocene

4.3 x 3.5 cm

The test of these sea urchins is well preserved displaying the typical pentamerism; this species named for the limestone formation where found; raised tubercles are distinct where the spines originally attached; the ambulacral grooves are marked by rows of slits through which the tube feet projected

$ 25
 

 

Echin 19b

Sea Urchin:  Eupatagus ocalanus

This sea urchin has the same phylogeny and is
from the same location as above, this one is larger
(5.9  x 5  cm) and it is in slightly better condition

$ 28
 

Echin 21

Phylum Echinodermata
Class Echinoidea
Order Spatangoida
Family Hemiasteridae
Genus Hemiaster
Species calvini

Sea Urchin:  Hemiaster calvini

Grayson Fm - Washita Grp., Bryan County, Oklahoma, late Cretaceous

A “regular” sea urchin measuring 3 x 2.5 cm; has a pentaradial shape with the peristome on the lower, anterior surface;  the surface of the test looks smooth, but uneven; no tubercles are present

$ 24

 
Echin 22

Phylum Echinodermata
Class Echinoidea
Subclass Euechinoidea
Order Cassiduloida
 Genus Echinolampas
Species appendiculatus

Sea Urchin:  Echinolampas appendiculatus

Castle Hayne Fm, Maple Hill,
North Carolina, Eocene

A “regular” sea urchin measuring 3.5 x 3 cm; has a pentaradial shape with the peristome on the lower, central surface and the periproct in the middle of the apical disc on the upper, central surface; the ambulacral grooves are distinct, but have little depth unlike many which have deep grooves; the surface of the test of this specimen is different as it “pin-pricked;” upon magnification the spots are actually tiny tubercles surrounded by a tiny perfect moat

$ 24


MS Book and Mineral Company

Echinodermata - part 1

Echinodermata - part 3

Fossil Specimen Index

Paleontology Index

Place an Order

Catalogs on this Website