Phacopida

Omegops mobilis

Order Phacopida / Suborder Phacopina / Superfamily Phacopoidea / Family Phacopidae

Famennian (Late Devonian)Xinjiang

Omegops mobilis — photo 1 — Photo 1 · Holotype T1271 (Xinjiang; Restoration of the moulting process (Zong et Xiang 1981) al., 2017) Exuvia specimen figures (Xinjiang; Zong et al., Literature specimen (Xinjiang; Zong 2023) 2017)

Omegops mobilis — photo 2 — Photo 2 · Holotype T1271 (Xinjiang; Restoration of the moulting process (Zong et Xiang 1981) al., 2017) Exuvia specimen figures (Xinjiang; Zong et al., Literature specimen (Xinjiang; Zong 2023) 2017)

Omegops mobilis — photo 3 — Photo 3 · Holotype T1271 (Xinjiang; Restoration of the moulting process (Zong et Xiang 1981) al., 2017) Exuvia specimen figures (Xinjiang; Zong et al., Literature specimen (Xinjiang; Zong 2023) 2017)

Omegops mobilis — photo 4 — Photo 4 · Holotype T1271 (Xinjiang; Restoration of the moulting process (Zong et Xiang 1981) al., 2017) Exuvia specimen figures (Xinjiang; Zong et al., Literature specimen (Xinjiang; Zong 2023) 2017)

Classification

Order Phacopida / Suborder Phacopina / Superfamily Phacopoidea / Family Phacopidae

Genus

Omegops Struve, 1976

Genus author

Struve W.

Genus etymology

None

Species

O. mobilis (Xiang, 1981)

Species author

Xiang Liwen

Species etymology

mobilis, Latin, movable

Age

Famennian (Late Devonian)

Distribution

Xinjiang

Synonyms

Phacops (Omegops) accipitrinus mobilis; Phacops accipitrinus mobilis; Omegops honggulelengensis

Diagnosis

Dorsal shield elliptical. Cephalon semicircular; glabella expanding forward, subtrapezoidal, first pair of lateral glabellar furrows rather distinct, anterior glabellar furrows faint or absent; anterior occipital ring narrow; occipital ring wide; dorsal furrows deep and distinct; eyes large, close to the glabella, with a maximum of four lenses vertically; cheeks narrow with bluntly rounded genal angles. Thorax of 11 segments; axis narrower than pleurae; articulating facets well developed. Pygidium short, semi-elliptical; axis conical, of 8 rings plus a terminal piece; pleural ribs distinct; border undifferentiated, without a border furrow.