Linglongtaestheria, Ng & Tri, 2023

Li, Gang, 2020, New Spinicaudatan Species of Late Jurassic Linglongta Phase of Yanliao Biota from Western Liaoning, China, Zoological Studies 59 (36), pp. 1-8 : 3

Genus Linglongtaestheria gen. nov.

urn:lsid:zoobank.org:act:861FB496-4F6E-407E-8D69-CE183E7C38A0

Etymology: From Linglongta, a small town in the north-east of Jianchang County, western Liaoning Province.

Type species: Linglongtaestheria daxishanensis gen. and sp. nov., from the lower Upper Jurassic Tiaojishan Formation, Daxishan village, Linglongta, Jianchang County.

Diagnosis: Carapace small or moderate to the lower end in size; oval or elliptical in outline; growth bands near the umbo ornamented with small-diameter (8–15 µm) polygonal reticulation; growth bands in the middle part of the carapace ornamented with evenly distributed puncta (2–5 µm in diameter); the ornamentation gradually transforms to small-diameter (16–27 µm) reticulation or radial lirae in the lower part of the carapace, puncta occurring within reticulation or radially aligning between radial lirae.

Discussion: The new genus is similar to Triglypta Wang, 1984 and Tianzhuestheria Shen et al., 2002 in growth band ornamentation in the ventral part of the carapace, such as the occurrence of evenly distributed puncta, small-diameter punctate reticulation and radial lirae with intercalated radially aligned puncta. But, it differs from the latter two taxa in having small-diameter polygonal reticulation on growth bands near the umbo.

The new genus differs from Liaoxiestheria Liao et al., 2017 in that the latter lacks the reticulation and radial lirae ornament on growth bands in the ventral part of the carapace.