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 Author Hegg, Danilo 34DFC18A-F53D-417F-85FC-EF514F6D2EFD Wētā Conservation Charitable Trust, 135 Blacks Road, Ōpoho, Dunedin 9010, New Zealand. danilo@wetaconservation.org.nz Author Morgan-Richards, Mary 48F2FB1A-4C03-477C-8564-5417F9739AE1 Wildlife & Ecology Group, Massey University, Private Bag 11 - 222, Palmerston North 4442, New Zealand. M.Morgan-Richards@massey.ac.nz Author Trewick, Steven A. 7A378EE1-BADB-459D-9BAA-7059A675F683 Wildlife & Ecology Group, Massey University, Private Bag 11 - 222, Palmerston North 4442, New Zealand. S.Trewick@massey.ac.nz text European Journal of Taxonomy 2024 2024-12-10 971 1 75 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2761/12643 journal article 306705 10.5852/ejt.2024.971.2761 21607329-f345-406b-a11f-a58e8ad535e1 2118-9773 14451786 F82472D1-595D-4DB7-A463-513B94BE85D9

Table 1 (continued on next three pages). Dimensions and spine count of Isoplectron Hutton, 1896 and Praecantrix gen. nov.

		Isoplectron armatum armatum Hutton, 1896	Isoplectron armatum aciculatum Karny, 1937	Isoplectron bicolor sp. nov.
Sample size		46 (25 ♀♀, 21 ♂♂)	13 (6 ♀♀, 7 ♂♂)	6 (1 ♀, 5 ♂♂)
Apical spines fore, mid and hind femora 1		0 0, 0 1, 0 0	0 0, 0 1, 0 0	0 0, 0 1, 0 0
		2 ♀♀, 1 ♂: 0 0, 0 0, 0 0
Apical spines fore, mid and hind tibiae		2-3-8	2-3-8	2-3-8
		1 ♀, 2 ♂♂: 2-3-7	1 ♀, 1 ♂: 3-3-8
Body length (mm) 2		11.3 (8.6–13.8)	12.7 (9.9–16.8)	♀ 17.7 ♂ 13.4 (11.8–16.0)
Pronotum length (mm)		2.9 (2.1–4.0)	♀ 3.2 (2.8–3.4)	4.1 (3.8–4.3)
			♂ 3.4 (3.2–3.5)
Eye colour		green	green	green
Ovipositor length (mm)		8.4 (6.7–9.7)	8.8 (6.7–9.5)	13.7
Ratio ovipositor to body length		0.75 (0.62–0.87)	0.70 (0.64–0.77)	0.77
Teeth: ventral valve of ovipositor		7 (6–8)	7 (6–8)	6
Dorsal valve of ovipositor		serrated	serrated	serrated
Length of hind tibia (mm)		♀ 9.8 (7.5–12.4)	♀ 11.8 (10.4–12.7)	♀ 17.7
		♂ 11.7 (10.5–15.2)	♂ 15.4 (13.7–16.5)	♂ 19.5 (14.6–20.9)
Ratio hind tibia to body length		♀ 0.89 (0.73–1.10)	♀ 0.95 (0.80–1.15)	♀ 1.00
		♂ 1.06 (0.94–1.23)	♂ 1.15 (0.98–1.29)	♂ 1.36 (1.24–1.56)
Superior spines on hind tibia	prolateral	14 (11–20)	18 (15–20)	13.5 (13–16)
	retrolateral	15 (12–19)	17 (14–19)	13.5 (12–16)
Spine density on hind tibia (count/mm)	prolateral	♀ 1.46 (0.97–1.98)	♀ 1.45 (1.32–1.73)	♀ 0.73
		♂ 1.26 (0.85–1.70)	♂ 1.14 (0.94–1.39)	♂ 0.77 (0.72–0.89)
	retrolateral	♀ 1.55 (1.13–2.00)	♀ 1.37 (1.23–1.50)	♀ 0.79
		♂ 1.28 (0.92–1.70)	♂ 1.14 (0.95–1.39)	♂ 0.73 (0.57–0.96)
Pairs of longer spines on hind tibia		0	0	0
Superior spines on 1 st tarsus segment		0	0	0.5 (0–2)
Superior spines on 2 nd tarsus segment		0	0	0
Fore tibia, inferior spines	prolateral	2 (1–3)	2 (1–2)	2 (2–2)
	retrolateral	2 (1–2)	2 (1–2)	2 (2–2)
Fore tibia, superior spines		0	0	0
Mid tibia, inferior spines	prolateral	2 (1–2)	2 (0–2)	2 (2–2)
	retrolateral	1 (0–2)	1 (0–2)	2 (2–2)
Mid tibia, superior spines	prolateral	0	0	0
	retrolateral	0 (0–2)
Fore femur, inferior spines	prolateral	0	0	0
	retrolateral
Mid femur, inferior spines	prolateral	0	0	0
	retrolateral
Hind femur, inferior spines	prolateral	0 (0 – 2)	2 (1 – 2)	13.5 (9 – 17)
	retrolateral	2 (1 – 3)	3 (2 – 3)	5.5 (4 – 8)