Asaphida

Monkaspis quadrata

Order Asaphida / Superfamily Uncertain / Family Monkaspidae

Guzhangian (Miaolingian, Cambrian)Hunan

Monkaspis quadrata — photo 1 — Photo 1 · Greek, shield Lectotype CUGB231005 (Hunan; Peng 2020) Small individual specimen (Hunan; Peng et al., 2004) Large individual specimen (Hunan; Peng et al., 2004)

Monkaspis quadrata — photo 2 — Photo 2 · Greek, shield Lectotype CUGB231005 (Hunan; Peng 2020) Small individual specimen (Hunan; Peng et al., 2004) Large individual specimen (Hunan; Peng et al., 2004)

Monkaspis quadrata — photo 3 — Photo 3 · Greek, shield Lectotype CUGB231005 (Hunan; Peng 2020) Small individual specimen (Hunan; Peng et al., 2004) Large individual specimen (Hunan; Peng et al., 2004)

Classification

Order Asaphida / Superfamily Uncertain / Family Monkaspidae

Genus

Monkaspis Kobayashi, 1935

Genus author

Kobayashi T.

Genus etymology

Monk, a surname, in honour of the early Chinese trilobite researcher, the German scholar H. Monke; aspis,

Species

M. quadrata Yang in Zhou et al., 1977

Species author

Yang Jialu

Species etymology

quadrata, Latin, square. Possibly referring to the square cranidium and subsquare glabella

Age

Guzhangian (Miaolingian, Cambrian)

Distribution

Hunan

Diagnosis

Cranidium square; glabella subsquare, slightly constricted forward with flatly rounded front, three pairs of faint glabellar furrows; palpebral lobes medium; eye ridges weak; anterior border about half the length of the glabella (excluding the occipital ring). Pygidium elliptical; axis slender and long, with 7-8 rings plus a terminal piece; pleural region with 7 pairs of pleural furrows; border with 8 pairs of serrate short spines.