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Table 2 Palaeogeographical/fossil record (FR) calibration points used as priors molecular dating

From: A phylogeny for the pomatiopsidae (Gastropoda: Rissooidea): a resource for taxonomic, parasitological and biodiversity studies

Prior code/taxa diverging

Date

Type

Geological events involved/biogeography

Prior

Root/Lithoglyphidae diverge from other hydrobioids

305-169

F

Rissooidea in Carboniferous – Hydrobiidae widespread by upper Jurassic [44]

237 ± 34.7

Core group/Proto-Pomatiopsidae and Amnicolidae

161 - 83

F

Pomatiopsids, bithyniids & truncatellids in Purbeckian [85, 86] – Hydrobiidae well diverged by Santonian-Campanian [87]

122 ± 19.9

Malaya/Robertsiella diverges from Sundaland Neotricula clade

2.0 ± 1.98

M

S. malayensis and S. mekongi diverge (cox1 and rrnS clock calibrated using Pliocene pulse of Tian Shan uplift between C Asia and NW China [88]) [60]

2.0 ± 1.01

Khorat/β and γ strains of N. aperta diverge in N E Thailand

c.a. 0.8

P

Volcanism on eastern margin of Khorat Basin and river flow reversal [19]

0.8 ± 0.10

  1. All priors are normally distributed ± Standard Deviation (SD); the SD values reflect the degree of confidence in the calibration point and are set to cover the range of values in column two (95% confidence interval). All times are in Ma. Note: “Core-group” refers to all taxa excluding Hydrobia and Lithoglyphus. Calibration types: F, fossil record; M, molecular clock; P, palaeogeographical or tectonic.