. Bulletin of the Natural Histort Museum. Geology series. 84 ADRAIN AND FORTEY. PLATE 2 Figs 1-6, 8 Protostygina coronula sp. nov. la-b. It. 25952, holotype, cranidium, dorsal and anterior views, xl5. 2, It. 25953, pygidium, dorsal view, xl5. 3, It. 25954, cranidium, dorsal view, xl5. 4, It. 25955, pygidium, dorsal view, xl5. 5, It. 25956, pygidium, dorsal view, xl5. 6, It. 25957, pygidium, dorsal view, xl5. 8, It. 25958, cranidium, dorsal view, xl5. Figs 7, 10-12 Illaenus weaveri Reed in Gardiner & Reynolds, 1909 7, SM A10387, lectotype, pygidium, dorsal view, lOa-b, SM A1
. Bulletin of the Natural Histort Museum. Geology series. 84 ADRAIN AND FORTEY. PLATE 2 Figs 1-6, 8 Protostygina coronula sp. nov. la-b. It. 25952, holotype, cranidium, dorsal and anterior views, xl5. 2, It. 25953, pygidium, dorsal view, xl5. 3, It. 25954, cranidium, dorsal view, xl5. 4, It. 25955, pygidium, dorsal view, xl5. 5, It. 25956, pygidium, dorsal view, xl5. 6, It. 25957, pygidium, dorsal view, xl5. 8, It. 25958, cranidium, dorsal view, xl5. Figs 7, 10-12 Illaenus weaveri Reed in Gardiner & Reynolds, 1909 7, SM A10387, lectotype, pygidium, dorsal view, lOa-b, SM A10316, paralectotype, cranidium and right librigena, dorsal and right lateral views, x5. 11, It. 25959, pygidium, dorsal view, x5. 12, It. 25960, hypostome, ventral view, xlO. Fig. 9 Geragnostus clusus Whittington, 1963, It. 25961, cephalic shield, dorsal view, xl5. Sobova Formation, Upper Arenig, Turkey), although that specimen may well prove to be congeneric. Protostygina adumbrata Lisogor, 1995, is known from a single fragmentary cranidium. The species, from the Llanvim of Kazakhstan, is certainly congeneric with P. coronula, but detailed comparison will require more complete mate- rial. Family ODONTOPLEURIDAE Burmeister, 1843 Subfamily SELENOPELTINAE Hawle & Corda, 1847 Genus CERATOCEPHALINA Whittington, 1956 Type species. Ceratocephala (Ceratocephalina) tridens Whittington, 1956, Edinburg Formation, lower Mohawkian, Vir- ginia; by original designation. Ceratocephalina ramskoeldi sp. nov. PI. 3, figs 9, 12; PL 4, figs 9, 12-15 Etymology. After Lars Ramskold, University of Uppsala. Diagnosis. Cephalon with dense sculpture of fine tubercles; pri- mary ontogenetic tubercles subdued and difficult to discern in holaspides; median occipital spine short; anterior border very short (sag; exsag.); slender genal spine continued on to librigenal field as interior border; border spines not distinct; epiborder furrow broad; epiborder spines small; pygidium with two marginal border sp
Size: 1826px × 1368px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversity, bookleafnumber296
