logo

Illinodendron

Quenstedt, 1880, p. 192

Illinodendron Quenstedt, 1880, p. 192 is a junior synonym (available and invalid), see Latomeandra d'Orbigny ms in Milne Edwards and Haime 1849, p.271.

The question of the distinction with Latomeandra on the basis of the presence/absence of an "epitheca" should be studied more thoroughly.

Type Species

Lithodendron illitum Quenstedt, 1880, p. 800 pl. 174 fig.18-19; Monotypy

Type Specimen: Syntype; GPIT AN/1157-1158; Verified; Dry Preserved

Type Locality: Kimmeridgian (Upper Jurassic) from Nattheim (Germany)

Two syntypes are available in the Quenstedt's collection. One (GPIT/AN/1157 = pl. 174 fig. 18 in Quenstedt 1880) was considered by Geyer as a synonym of Protoseris robusta the other (GPIT/AN/1158 = pl. 174 fig. 19 in Quenstedt 1880) was considered as a synonym of Meandrina placenta.

Classification

Description

Phacelo-meandroid corallum with irregular branches having a lower face covered with equal costae and an upper surface with calices isolated or arranged in short series produced by intracalicinal increase with lamellar linkage. Tendancy to keep the growing edges of the colony horizontally. Radial elements subcompact, joining, subequal, of a rather constant thickness, straight or curved. Distal edge moniliform, inner edge with detached and anastomosed trabeculae, lateral faces with menianae. No palis. Microstructure unknown. Hexameral symmetry not deciphered, bilateral symmetry marked by the curvature of septa (convexity to the downstream of the growth). Endotheca not observed , Columella probably parietal., synapticulae present. Wall present close to the periphery of branches, of unknown nature.

Remarks

One nominal species. The genus was never used since Quenstedt 1880.

This page has been in preparation since 19-Aug-2009 13:31

This version was contributed by Bernard Lathuilière on 01-Oct-2016 09:30.

Page authors are: Ewa Roniewicz Bernard Lathuilière. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Bernard Lathuilière


Syntypes of Lithodendron illitum type species of the genus
info
Syntype of Lithodendron illitum type species of the genus
info
Syntype of Lithodendron illitum type species of the genus
info
Syntype of Lithodendron illitum type species of the genus
info

See all illustrations