Asaphida

Dionide hybrida

Order Asaphida / Superfamily Trinucleoidea / Family Dionididae

Katian (Late Ordovician)Yunnan; Myanmar

Dionide hybrida — photo 1 — Photo 1 · Aphrodite, goddess of love and beauty, and consort of Zeus; the rest of the etymology continues: the name was replaced because Dione was preoccupied. Holotype GSI 11509 (Myanmar; Fortey et al., 2022) Complete dorsal exoskeleton (Yunnan; Tuyang Tuseng Po)

Dionide hybrida — photo 2 — Photo 2 · Aphrodite, goddess of love and beauty, and consort of Zeus; the rest of the etymology continues: the name was replaced because Dione was preoccupied. Holotype GSI 11509 (Myanmar; Fortey et al., 2022) Complete dorsal exoskeleton (Yunnan; Tuyang Tuseng Po)

Classification

Order Asaphida / Superfamily Trinucleoidea / Family Dionididae

Genus

Dionide Barrande, 1847

Genus author

Barrande J.

Genus etymology

Originally Dione Barrande, 1846, a junior homonym replaced by Dionide. Dione, a Greek goddess, mother of

Species

D. hybrida Reed, 1915

Species author

Reed F. R. C.

Species etymology

hybrida, hybrid

Age

Katian (Late Ordovician)

Distribution

Yunnan; Myanmar

Synonyms

Digrypus hybridus

Diagnosis

Dorsal shield ovate. Cephalon semicircular; glabella short-cylindrical, median node at the middle of the glabella; occipital ring transversely narrow; cheeks densely ornamented with reticulate ridges and small shallow pits; genal ridges oblique; genal spines so long they may exceed the pygidium. Thorax of 6 segments, longitudinally shortening posteriorly; axis narrow, anterior lateral corners of each axial ring divided by a pair of oblique furrows into a pair of triangular anterior lateral lobes; pleural furrows narrow and shallow, bases raised. Pygidium subtriangular; axis conical, reaching the border furrow, with 18 rings and a terminal piece; pleural region with 16 segments, pleural furrows distinct, interpleural furrows faint, each segment raised adaxially.