Table 2. Isoplectron Hutton, 1896 in Revision of the New Zealand cave wētā genus Isoplectron Hutton (Orthoptera: Rhaphidophoridae), with synonymy of Petrotettix Richards and Setascutum Richards, and the description of a new genus

Table 2. Isoplectron Hutton, 1896 and Praecantrix gen. nov. Summary of Bayesian model results for length of insect body and of hind tibia as a function of sex, geographical coordinates (easting, northing in New Zealand Geodetic Datum 2000 map grid) and elevation (m a.s.l.). All models run in JASP ver. 0.17.1. Species for which sample size is too small for statistics are omitted. CI stands for credible intervals; for covariates these are only reported where they are significant.
SpeciesMeasurements (mm)Sample size 1Bayesian Linear Mixed Model Fixed factor: Sex Random factor: LocationBayesian Linear Regression Factor: Sex Covariates: Easting, Northing, ElevationIsoplectron armatum armatum Hutton, 1896Body46No sexual dimorphism 95% CI: - 0.34–0.93 mmNo effect of covariatesHind tibia46+ 2.5mm in ♂ 95% CI: 1.59–3.20 mmNo effect of covariatesIsoplectron armatum aciculatum Karny, 1937Body13No sexual dimorphism 95% CI: -1.09– 0.99 mmNo effect of covariatesHind tibia13+ 3.2mm in ♂ 95% CI: 1.01–5.35 mmNo effect of covariatesIsoplectron pallidum Richards, 1972Body23No sexual dimorphism 95% CI: -1.54– 1.40 mm+ 0.13 mm per 100 m elevation 95% CI: 0.00 mm– 0.60 mm+ 0.99mm per 100 km south 95% CI: 0.00 mm– 2.96 mmHind tibia23+ 1.2 mm in ♂ 95% CI: - 0.01–2.35 mm+ 0.15 mm per 100 m elevation 95% CI: 0.00 mm– 0.60mmIsoplectron serratum Richards, 1972Body27+ 1.2 mm in ♀ 95% CI: 0.1–2.37 mmNo effect of covariatesHind tibia27+ 3.7 mm in ♂ 95% CI: 1.84–5.89 mmNo effect of covariatesIsoplectron ferratum sp. nov.Body18No sexual dimorphism 95% CI: - 1.1–2.06 mmNo effect of covariatesHind tibia18No sexual dimorphism 95% CI: - 0.27–1.23 mmNo effect of covariatesPraecantrix silvatica gen. et sp. nov.Body23+ 1.2 mm in ♀ 95% CI: 0.3–1.97 mmNo effect of covariatesHind tibia23+ 0.8 mm in ♀ 95% CI: 0.12–1.43 mmNo effect of covariatesPraecantrix saxicola gen. et sp. nov.Body10+ 2.8 mm in ♀ 95% CI: 1.56–4.09 mmSample size too smallHind tibia10+ 1.8 mm in ♀ 95% CI: 0.06–3.42 mmSample size too small
1 For the number of males and females in each sample, refer to Table 1.