Corynexochida

Karslanus leishuae

Order Corynexochida / Suborder Leiostegiina / Superfamily Dameselloidea / Family Dorypygellidae

Guzhangian (Miaolingian, Cambrian)Yunnan
Karslanus leishuae — photo 1
Photo 1 · Zhu Xuejian Dorsal and ventral restorations (Peng et al., Holotype NIGP 175158 (A internal mould, B external mould, D latex cast of B, E composite of A and 2024) B; Yunnan; Peng et al., 2024) Complete dorsal exoskeleton, part and Semi-enrolled external mould and its latex cast NIGP 175159 (Yunnan; Peng et al., 2024) counterpart (Yunnan; Weidingzhong Guchong)
Karslanus leishuae — photo 2
Photo 2 · Zhu Xuejian Dorsal and ventral restorations (Peng et al., Holotype NIGP 175158 (A internal mould, B external mould, D latex cast of B, E composite of A and 2024) B; Yunnan; Peng et al., 2024) Complete dorsal exoskeleton, part and Semi-enrolled external mould and its latex cast NIGP 175159 (Yunnan; Peng et al., 2024) counterpart (Yunnan; Weidingzhong Guchong)
Karslanus leishuae — photo 3
Photo 3 · Zhu Xuejian Dorsal and ventral restorations (Peng et al., Holotype NIGP 175158 (A internal mould, B external mould, D latex cast of B, E composite of A and 2024) B; Yunnan; Peng et al., 2024) Complete dorsal exoskeleton, part and Semi-enrolled external mould and its latex cast NIGP 175159 (Yunnan; Peng et al., 2024) counterpart (Yunnan; Weidingzhong Guchong)
Karslanus leishuae — photo 4
Photo 4 · Zhu Xuejian Dorsal and ventral restorations (Peng et al., Holotype NIGP 175158 (A internal mould, B external mould, D latex cast of B, E composite of A and 2024) B; Yunnan; Peng et al., 2024) Complete dorsal exoskeleton, part and Semi-enrolled external mould and its latex cast NIGP 175159 (Yunnan; Peng et al., 2024) counterpart (Yunnan; Weidingzhong Guchong)
Classification
Order Corynexochida / Suborder Leiostegiina / Superfamily Dameselloidea / Family Dorypygellidae
Genus
Karslanus Özdikmen, 2009
Genus author
Özdikmen H.
Genus etymology
From the surname and initials of Kemal Arslan, a Turkish student of Özdikmen.
Species
K. leishuae Peng, Babcock, Yang & Zhu, 2024
Species author
Peng Shanchi, Babcock L. E., Yang Xianfeng,
Species etymology
Leishu, in honour of Ms. Lei Shu, who performed the logistical organisation and specimen collection for the Fulu Biota and many other studies in Cambrian palaeontology and stratigraphy
Age
Guzhangian (Miaolingian, Cambrian)
Distribution
Yunnan
Diagnosis
Surface smooth except for the axis. Cephalon semicircular; glabella subrectangular to trapezoidal with four pairs of glabellar furrows, S1 and S2 distinct, S3 pit-like, S4 faint; occipital ring with a small median node; eyes large; eye ridges short; librigenae wide with short genal spines. Thorax of 10 segments; axis with two rows of nodes; pleural furrows wide, pleural spines short and hook-like. Pygidial axis with 6 rings plus a terminal piece; pleural region with 6 lateral spines.
Remarks
Karslanus leishuae is the first damesellid trilobite reported with 10 thoracic segments.