UTRECHT MICROPALEONTOLOGICAL BUllETINS

Type-stratum: The limestone bed in member Kk2 from which sample 12 was
taken, see chart II.
Remarks: This assemblage zone was based on one single sample (12, section
1, chart II). Cordylodus rotundatus was not actually found in this zone, but
it might form part of it, according to its deduced regional range (fig. 15).
Drepanoistodus numarcuatus was not found anymore above this zone.
II.2.4.8. The Triangulodus subtilis/Gothodus microdentatus Assemblage
Zone
Diagnosis: A conodont assemblage zone defined by the total range of
Gothodus microdentatus and by the occurrence of Triangulodus subtilis
before the first appearances of Scolopodus rex and Oelandodus elongatus
(chart II and fig. 15).
Description: In the rock-sequence of Kopingsklint Gothodus microdentatus,
Triangulodus subtilis, Drepanoistodus conulatus and Periodon flabellum start
their range together in this zone. They were found together with Cordylodus
angulatus, Paroistodus amoenus, P.parallelus, Scolopodus peselephantis,
Drepanodus arcuatus, Paracordylodus gracilis, Protopanderodus longibasis,
Prioniodus deltatus, Drepanoistodus inconstans and Dforceps.
Type-locality: Kopingsklint, section l.
Type-strata: The two upper limestone beds of member Kk 2.
Remarks: This assemblage zone was recognized in only one sample (13 in
section 1, see chart II). Paroistodus amoenus and Gothodus microdentatus
seem to terminate their range at the top of this zone. Cordylodus rotundatus
was not actually found in this zone, but it might occur in it according to its
regional range (fig. 15).
11.2.4.9. The Prioniodus elegans/Oelandodus elongatus Assemblage Zone
Diagnosis: A conodont assemblage zone characterized by the occurrence of
Prioniodus elegans and Oelandodus elongatus before the first appearance of
Stolodus stoia (chart III and fig. 15).
Description: In the rock-sequence of section 6 Prioniodus elegans, Oelandodus
elongatus and Scolopodus rex start their range with a considerable
number of species, known from the previous zones at Kopingsklint and near
Horns Udde: Scolopodus peselephantis, Drepanodus arcuatus, Protopanderodus
longibasis, Prioniodus deltatus, Drepanoistodus forceps, D.conulatus,
Paroistodus parallelus and Periodon flabellum.
Type-locality: The coastal cliff between Aleklinta and Djupvik, section 6.
Type-stratum: The basal glauconitic bed of member Ka- d 1, sample 2, chart
III.