Monodechenella subquadrata ( Engel & Morris 1984 )

Vanderlaan, Tegan A. & Ebach, Malte C., 2015, A review of the Carboniferous and Permian trilobites of Australia, Zootaxa 3926 (1), pp. 1-56 : 21

publication ID

https://doi.org/ 10.11646/zootaxa.3926.1.1

publication LSID

lsid:zoobank.org:pub:342DDB94-4739-464B-AF67-4B17C6EE35D7

DOI

https://doi.org/10.5281/zenodo.5623229

persistent identifier

https://treatment.plazi.org/id/1B76A233-D740-FFAE-A6C7-A0DF64569F7F

treatment provided by

Plazi

scientific name

Monodechenella subquadrata ( Engel & Morris 1984 )
status

 

Monodechenella subquadrata ( Engel & Morris 1984)

1918 Phillipsia woodwardi ; Mitchell, pl. 51, fig. 13, pl. 52, fig. 2.

1918 Phillipsia woodwardi ?; Mitchell, pl. 51, fig. 14, pl. 52, fig. 1.

1984 Conophillipisa subquadrata Engel & Morris; p. 50–53, figs. 16–17.

Holotype. AMF80575 (external mould of cranidium).

Paratype material. From NSW 58–12: AMF80574 (partial internal pygidium), AMF80576a/b (external/ internal pygidium), AMF80577a/b (external/internal pygidium). From NU L39: AMF80572 (external pygidium), AMF80573 (external pygidium), AMF80578 (internal pygidium), AMF80579 (internal librigena), AMF80580 (internal pygidium), AMF80581 (internal cranidium), AMF80582 (internal pygidium), AMF80583 (external pygidium), AMF80584 (internal pygidium), AMF80585 (internal pygidium), AMF80586 (internal pygidium), AMF80587 (partial internal thorax), AMF80588a/b (external/internal pygidium), AMF80589 (external pygidium), AMF80590a/b (external/internal pygidium), AMF80593 (external pygidium), AMF80594 (external pygidium), AMF80595 (internal pygidium), AMF80596 (external librigena), AMF80597 (internal pygidium), AMF80598 (external pygidium). From NSW 112–6: AMF80591 (internal pygidium), AMF80592 (internal pygidium). From QGS L3004: QGSF 1017 (external cranidium), QGSF 1031 (external pygidium), QMF2839 (external pygidium).

Locality. Type—NSW L58–12. Others—NU L39, NSW L112–6, QGS L3004.

Emended diagnosis. Rounded genal angles; glabellar length equal to width, moderately convex. Pygidium broadly parabolic, convex axis; border convex; 13+ axial rings; 10–11 pleural ribs; ring furrows straight; lateral lobes on axis.

Remarks. The diagnosis is emended to remove the length of the glabella, as this is uncertain in the available specimens. Monodechenella subquadrata appears to be most similar to Monodechenella grandis (Etheridge Jr. 1892a) (see M. grandis remarks below for a detailed comparison).

NSW

Royal Botanic Gardens, National Herbarium of New South Wales

Kingdom

Animalia

Phylum

Arthropoda

Class

Trilobita

Order

Proetida

Family

Proetidae

Genus

Monodechenella

GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF