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Paläontologische Zeitschrift

, Volume 72, Issue 1–2, pp 117–134 | Cite as

New finds of vertebrates in the Middle Devonian Brandenberg Group (Sauerland, Northwest Germany)

  • Markus Otto
Article

Abstract

The arthrodires of the Eifelian Brandenberg Group of Hagen-Ambrock and Lasbeck (Northwest Germany) are described. A new tuberculated holonematid arthrodire (Holonema bruehni n. sp.) is represented by plates of the trunk shield and some plates of the head region. The tuberculation is here regarded as the plesiomorphic character of the Holonematidae compared to an ornamentation of ridges in advanced genera. This agrees with the stratigraphical occurrence of the new form. Additionally, several other plates belonging to at least three different taxa of coccosteid arthrodires have been found. Despite the absence of complete skeletons, the placoderm fauna is more diverse than the fauna of the classical Scottish Eifelian localities.

Keywords

Devonian Frasnian Middle Devonian Central Plate Skull Roof 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of abbreviations

1-6

corners of the suborbital/postsuborbital complex

AL

anterolateral plate

ADL

anterodorsolateral plate

AMV

anteromedioventral plate

AVL

anteroventrolateral plate

IL

interolateral plate

M

marginal plate

NU

nuchal plate

PL

posterolateral plate

PMV

posteromedioventral plate

PNU

paranuchal plate

PRO

preorbital plate

PTO

postorbital plate

SP

spinal plate

add

depression for the adductor muscles

adl

anterodorsal lamina

au.pq

attachment face for the autopalatinal part of the palatoquadrate

cc

central canal

cd

condylus

cf.ADL

contact face for the ADL

cf.M

contact face for the M

cf.PDL

contact face for the PDL

cf.PTO

contact face for the PTO

cf.SP

contact face for the SP

d.e.

endolymphatic duct Ductus

d.porb.pr

dermal preorbital process

g.a.

growth anomaly

gr.ssc

groove for the semicircular canals

gr.pbl

groove for the postbranchial lamina

ik

internal keel of the submarginal

k

ventral (internal) keel of the MD

l.orb.v

ventral orbital lamina

la.obst

obstantic lamina Lamina

la.p.pct

postpectoral lamina

la.pbr

postbranchial lamina

la.sscc

suprascapulocoracoid lamina

lc

main lateral canal

dl

dorsal sensory line

m.gr

median groove

met.pq

attachment face for the metapterygoidal part of the palatoquadrate

mp

middle pitline

nvg

neurovascular groove

oa.AL

overlapped area for AL

oa.AVL

overlapped area for AVL

oa.C

overlapped area for C

oa.IL

overlapped area for IL

oa.MD

overlapped area for MD

oa.NU

overlapped area for NU

oa.PMV

overlapped area for PMV

oa.PRO1

first overlapped area for PRO

oa.PRO2

second overlapped area for PRO

oa.PTO

overlapped area for PTO

oa.PVL

overlapped area for PVL

oa.PVL sin

overlapped area for left PVL

par.f

pararticular face

pgl

glenoid process of the paranuchal

pp

posterior pitline

poc

postoral canal

pr.obst

obstantic process

pr.pl

posterolateral process

pr.pnu

postnuchal process

pr.sgl

subglenoid process

qu.pq

attachment face for the quadratal part of the palatoquadrate

s.n.v

groove for superficial nerves and vessels

sb.pct.m

subpectoral margin

sl

sensory line

sorc

supraoral canal

sp.pct.m

suprapectoral margin

sv.sw

supravagal swelling

vr

ventral ridge

vsl

ventral sensory line

Kurzfassung

Arthrodiren aus dem Eifelium von Hagen-Ambrock und Lasbeck (Sauerland, Nordwestdeutschland) werden beschrieben. Von einem bemerkenswerten tuberkulierten Holonematiden (Holonema bruehni n. sp.) sind die meisten Platten des Rumpfpanzers und einige Platten aus der Kopfregion vorhanden. Die Tuberkulierung der Knochenoberfläche wird als plesiomorph gegenüber der Leistenskulptur anderer Holonematiden angesehen, was auch durch das stratigraphische Auftreten untermauert wird. Weiterhin enthält die Fauna mindestens drei verschiedene Taxa coccosteider Arthrodiren und ist — trotz des Fehlens von vollständigen, artikuliert erhaltenen Exemplaren — hinsichtlich der Arthrodiren artenreicher als der klassischen schottischen Fundstellen.

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Copyright information

© E. Schweizerbart’sche Verlagsbuchhandlung 1998

Authors and Affiliations

  • Markus Otto
    • 1
  1. 1.Institut für PaläontologieMuseum für Naturkunde der Humboldt-UniversitätBerlinGermany

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