Plate 1

Plate 1

All figures x750 unless stated otherwise.

Figs. 1-8 Ambitisporites avitus .....Hoffmeister 1959

Fig. 1. MS 3, Middle Ross Brook Member, Aeronian (sample mr486 slide b, England Finder Number Q39\4)

Fig. 2. MS 3, Middle Ross Brook Member, Aeronian (sample mr486 slide b, E.F. no. U44)

Fig. 3. MS 3, Middle Ross Brook Member, Aeronian (sample mr486 slide b, E.F. no. S50\4 -T51\1)

Fig. 4. MS 5, Upper Ross Brook Member, Telychian (sample ur436 slide b, E.F. no. P36\2)

Fig. 5. MS 5, Upper Ross Brook Member, Telychian (sample ur436 slide a, E.F. no. P41)

Fig. 6. MS 5, Upper Ross Brook Member, Telychian (sample ur436 slide b, E.F. no. G48\1)

Fig. 7. MS 6, Upper Ross Brook Member, Telychian (sample ur373 slide b, E.F. no. V37\3-4)

Fig. 8. MS 6, Upper Ross Brook Member, Telychian (sample ur373 slide b, E.F. no. L35\3)

Figs. 9-11. Tetrahedraletes medinensis .....Strother & Traverse emend. Wellman & Richardson 1993

Fig. 9. MS 6, Upper Ross Brook Member, Telychian (sample ur373 slide b, E.F. no. Y31\4)

Fig. 10. MS 6, Upper Ross Brook Member, Telychian (sample ur373 slide b, E.F. no. F44\1)

Fig. 11. MS 6, Upper Ross Brook Member, Telychian (sample ur373 slide b, E.F. no. F32\2)

Fig. 12. Ambitisporites avitus ......Hoffmeister 1959, MS 7, French River Formation, Sheinwoodian (sample fr389 slide a, E.F. no. U28\3)

Fig. 13. Ambitisporites avitus ....Hoffmeister 1959, MS 13, Upper McAdam Brook Member, Gorstian (sample umb432 slide a, E.F. no. N38)

Fig. 14. Ambitisporites dilutus .....(Hoffmeister) Richardson and Lister 1969, MS 14, Upper McAdam Brook Member, Gorstian-Ludfordian (sample umb313 slide b, E.F. no. L40\1)

Fig. 15. Ambitisporites avitus .....Hoffmeister 1959, MS 14, Upper McAdam Brook Member, Gorstian-Ludfordian (sample umb467 slide a, E.F. no. P36\1)

Figs. 16-18. Ambitisporites marginatus ......sp. nov.

Fig. 16. MS 14, Upper McAdam Brook Member, Gorstian-Ludfordian (sample umb313 slide b, E.F. no. M53-M53\3)

Fig. 17. Holotype, MS 14, Upper McAdam Brook Member, Gorstian-Ludfordian (sample umb313 slide b, E.F. no. S34)

Fig. 18. MS 14, Upper McAdam Brook Member, Gorstian-Ludfordian (sample umb313 slide b, E.F. no. N42\2)