Globator clarki (Bose, 1910)
Plate: GlCl-10
Series: Lower Cretaceous Group: Washita Formation: Denton
Locale: Fort Stockton County: Pecos Stage: Albian
Length: 18.0 mm Width: 17.0 mm Height: 12.0 mm
Specimen in photo: USNM 79217A (Hypotype) Smiser Collection
Repository: National Museum of Natural History (NMNH), Smithsonian Institution
HOLOTYPE INFO:
Holotype: Original types described by Böse (1910) are likely housed in the Instituto Geológico de México.
Locality: Cerro de Muleros, Chihuahua, Mexico / Texas border region (Böse, 1910)
SYNONYMY
Class: Echinoidea Leske, 1778
Subclass: Euechinoidea Bronn, 1860
Infraclass: Irregularia Latreille, 1825
Superorder: Echinoneidea Kroh & Smith, 2010
Order: Echinoneoida H. L. Clark, 1925
Family: Conulidae Lambert, 1911
Genus: GLOBATOR L. Agassiz, 1840
Species: Globator clarki (Böse, 1910)
TYPE SPECIES: Globator nucleus L. Agassiz, 1840
STRATIGRAPHICAL OCCURRENCE & DISTRIBUTION
Group: Washita
Formations: Denton Formation
Stratigraphic Units: Lower Cretaceous, Albian
Counties: Pecos County
DESCRIPTION
TOP: Length, width, height: 18 mm L × 17 mm W × 12 mm H
Top shape: Oval, subpentagonal (Böse, 1910)
Top domed: Convex, subconical (Böse, 1910)
SIDE: Ambitus: Rounded off very little (Böse, 1910)
BOTTOM: Bottom flat: Almost flat (Böse, 1910)
Bottom shape: Slightly concave in the center (Böse, 1910)
AMB: Amb shape: Straight (Böse, 1910)
Amb width: Relatively wide; about the same width, only the unpaired amb is slightly narrower (Böse, 1910)
Relief: Ambulacra are slightly convex on the upper side (higher than the rest of the shell); depressed lower than the rest of the shell on the bottom (Böse, 1910)
INTERAMB: Interamb width: Wide (Böse, 1910)
PORE PAIRS: Arrangement: Unigeminal; pores small and very numerous on upper face and ambitus. In central region of lower face, they turn aside from a straight line forming 9 oblique lines (triads), each consisting of 3 pairs of pores (Böse, 1910).
TUBERCLES: Primary tubercles: Numerous small tubercles; arranged in oblique series (bowing from sides towards center). Tubercles of top face are less strong/prominent than those of low face (Böse, 1910).
Primary Perforated: Yes (Böse, 1910)
Primary Crenulate: Yes (Böse, 1910)
Primary Areola shape: Deep areolas (Böse, 1910)
Granules: Numerous fine granules between tubercles in both ambs and interambs (Böse, 1910)
APICAL SYSTEM: Location: Forward, slightly eccentric (Böse, 1910)
Genital pores: 4 perforated genital plates; front right modified as madreporite and grainy (Böse, 1910)
Ocular plates: 5 perforated oculars, well pronounced (Böse, 1910)
PERIPROCT (ANUS): Shape & Size: Oval rather than pyriform (Böse, 1910)
Location: Supramarginal; opens in the area of the odd interambulacrum (Böse, 1910)
PERISTOME (MOUTH): Size: Small (Böse, 1910)
Shape: Oval, slightly oblique (Böse, 1910)
Location: Somewhat closer to the leading edge (anterior); opens in a slight depression (Böse, 1910)
SPECIMENS STUDIED & CONDITION: Hypotype USNM 79217A (Smiser Collection) .
ETYMOLOGY: Named in honor of William Bullock Clark (1860–1917), a prominent American echinoderm specialist (Böse, 1910).
REMARKS & COMPARISONS
Remarks: Böse (1910) noted this species was apparently cited by Stanton and Vaughan as Pyrina parryi, but differs by its oval contour, non-domed ambitus, and high number of tubercles. C. W. Cooke (1946) considered Globator clarki a synonym of Globator parryi (Hall) (listed as pyrina in text).
Comparisons: Differs from Globator parryi by the oval contour and different position of the periproct (Böse, 1910).
Plate: GlCl-10
Series: Lower Cretaceous Group: Washita Formation: Denton
Locale: Fort Stockton County: Pecos Stage: Albian
Length: 18.0 mm Width: 17.0 mm Height: 12.0 mm
Specimen in photo: USNM 79217A (Hypotype) Smiser Collection
Repository: National Museum of Natural History (NMNH), Smithsonian Institution
HOLOTYPE INFO:
Holotype: Original types described by Böse (1910) are likely housed in the Instituto Geológico de México.
Locality: Cerro de Muleros, Chihuahua, Mexico / Texas border region (Böse, 1910)
SYNONYMY
- Pyrina clarki Böse, 1910
Class: Echinoidea Leske, 1778
Subclass: Euechinoidea Bronn, 1860
Infraclass: Irregularia Latreille, 1825
Superorder: Echinoneidea Kroh & Smith, 2010
Order: Echinoneoida H. L. Clark, 1925
Family: Conulidae Lambert, 1911
Genus: GLOBATOR L. Agassiz, 1840
Species: Globator clarki (Böse, 1910)
TYPE SPECIES: Globator nucleus L. Agassiz, 1840
STRATIGRAPHICAL OCCURRENCE & DISTRIBUTION
Group: Washita
Formations: Denton Formation
Stratigraphic Units: Lower Cretaceous, Albian
Counties: Pecos County
DESCRIPTION
TOP: Length, width, height: 18 mm L × 17 mm W × 12 mm H
Top shape: Oval, subpentagonal (Böse, 1910)
Top domed: Convex, subconical (Böse, 1910)
SIDE: Ambitus: Rounded off very little (Böse, 1910)
BOTTOM: Bottom flat: Almost flat (Böse, 1910)
Bottom shape: Slightly concave in the center (Böse, 1910)
AMB: Amb shape: Straight (Böse, 1910)
Amb width: Relatively wide; about the same width, only the unpaired amb is slightly narrower (Böse, 1910)
Relief: Ambulacra are slightly convex on the upper side (higher than the rest of the shell); depressed lower than the rest of the shell on the bottom (Böse, 1910)
INTERAMB: Interamb width: Wide (Böse, 1910)
PORE PAIRS: Arrangement: Unigeminal; pores small and very numerous on upper face and ambitus. In central region of lower face, they turn aside from a straight line forming 9 oblique lines (triads), each consisting of 3 pairs of pores (Böse, 1910).
TUBERCLES: Primary tubercles: Numerous small tubercles; arranged in oblique series (bowing from sides towards center). Tubercles of top face are less strong/prominent than those of low face (Böse, 1910).
Primary Perforated: Yes (Böse, 1910)
Primary Crenulate: Yes (Böse, 1910)
Primary Areola shape: Deep areolas (Böse, 1910)
Granules: Numerous fine granules between tubercles in both ambs and interambs (Böse, 1910)
APICAL SYSTEM: Location: Forward, slightly eccentric (Böse, 1910)
Genital pores: 4 perforated genital plates; front right modified as madreporite and grainy (Böse, 1910)
Ocular plates: 5 perforated oculars, well pronounced (Böse, 1910)
PERIPROCT (ANUS): Shape & Size: Oval rather than pyriform (Böse, 1910)
Location: Supramarginal; opens in the area of the odd interambulacrum (Böse, 1910)
PERISTOME (MOUTH): Size: Small (Böse, 1910)
Shape: Oval, slightly oblique (Böse, 1910)
Location: Somewhat closer to the leading edge (anterior); opens in a slight depression (Böse, 1910)
SPECIMENS STUDIED & CONDITION: Hypotype USNM 79217A (Smiser Collection) .
ETYMOLOGY: Named in honor of William Bullock Clark (1860–1917), a prominent American echinoderm specialist (Böse, 1910).
REMARKS & COMPARISONS
Remarks: Böse (1910) noted this species was apparently cited by Stanton and Vaughan as Pyrina parryi, but differs by its oval contour, non-domed ambitus, and high number of tubercles. C. W. Cooke (1946) considered Globator clarki a synonym of Globator parryi (Hall) (listed as pyrina in text).
Comparisons: Differs from Globator parryi by the oval contour and different position of the periproct (Böse, 1910).
