Table 4. Intra- and interspecific absolute (a) and uncorrected (p) distances for the 500 and 774 alignment lengths.

Closest sequences for the most closely related taxa on the tufA ML tree with sequences representative of all known haplotypes. Data and closest sequence following Kirkendale, Saunders & Winberg (2013) (#). Dash (”-”): no p distance estimate due to limited sequence length for U. taeniata and U. arasakii.

Haplotype, nominal species (number of sequences)	500 bp this study					774 bp this study and Kirkendale, Saunders & Winberg (2013)
	Intraspecific		Interspecific
	a	p (%)	Closest sequences		a	p (%)	a		p (%)
H1 U. lacinulata(Kützing) Wittrock (n = 192)	0–2	0–0.4	U. taeniataKC661445		6	1.2	≥ 7		–
			U. lactuca lectotype of U. lobata  MH730972, JN029303, # as U. fasciata JN029299		8	1.6	9 #		1.16 #
			U.  sp. A AF-2021MT160688		6	1.2	7		0.9
H2 U.  sp. A AF-2021 (n = 95)	0	0	U. taeniataKC661445		7	1.4	≥ 10		–
			U. lactucaMH763013		8	1.6	9		1.16
			U. lacinulataMT160687, MT160689		5–7	1.0–1.4	7–9		0.9–1.16
H3 U. rigida C. Agardh (n = 9)	0	0	U. expansaMH730973 Holotype		22	4.4	33		4.3
H4 U. australis (n = 41)	0–2	0–0.4	U. arasakiiAB561079		26	5.2	≥ 35		–
			U. pseudorotundataMT160686		34	6.8	50		6.5
			U. fenestrataMK456404, MT160662, # as U. lactucaHQ610325, HQ610327		35–37	7.0–7.4	43 #		5.56 #
H5 U. fenestrata (n = 2)	0–3	0–0.6	U. arasakiiAB561079		17	3.4	≥ 19		–
			U. australisMH538644, MT160679, MT160695		35–37	7.0–7.4	44-45		5.7–5.8
			U. rigidaMT160686		33	6.6	40		5.2