Revision of fossil Metretopodidae (Insecta, Ephemeroptera) in Baltic amber - Part 4: Description of two new species of Siphloplecton Clemens, 1915, with notes on the new S. jaegeri species group and with key to fossil male adults of Siphloplecton Author Godunko, Roman J. Author Neumann, Christian Author Staniczek, Arnold H. text ZooKeys 2019 898 1 26 http://dx.doi.org/10.3897/zookeys.898.47118 journal article http://dx.doi.org/10.3897/zookeys.898.47118 1313-2970-898-1 7B407C809E644F5995C2B3229CF78C6B 278CAE686DE65920AF5B0FE8BA1BBDC1

Table 1. Measurements of fossil representatives of the Siphloplecton jaegeri species group.

Adult characters	Siphloplecton jaegeri [MNB, MB.I 7370, male imago] (mm)	Siphloplecton jaegeri [MNHN, 4655 BA, male imago] (mm)	Siphloplecton landolti sp. nov. [SMNS, BB- 2377, holotype, male imago] (mm)	Siphloplecton studemannae sp. nov. [SMNS, BB- 2626, holotype, female imago] (mm)	Siphloplecton studemannae sp. nov. [MNHK, MP/1626, paratype, female imago] (mm)	Siphloplecton sp. 5 [CCHH, BaB 1159/5, male imago] (mm)	Siphloplecton sp. 6 [MNB, MB.I 7372, male subimago] mm)
Length of body	9.00	9.08	10.88	10.04	9.48	9.50	8.50
Length of right foreleg	-	9.64	-	-	-	-	5.11
Length of femur	-	1.80	-	-	-	-	1.77
Length of tibia	-	2.00	-	-	-	-	1.05
Length of tarsus	-	5.84	-	-	-	-	2.29
Tarsomere 1	-	1.40	-	-	-	-	0.48
Tarsomere 2	-	1.40	-	-	-	-	0.45
Tarsomere 3	-	1.44	-	-	-	-	0.48
Tarsomere 4	-	1.20	-	-	-	-	0.53
Tarsomere 5	-	0.40	-	-	-	-	0.35
Length of left foreleg	8.54	9.40	3,44*	4.04*	-	13.44	5.04
Length of femur	1.75	1.80	1.04*	2.02*	-	3.12	1.73
Length of tibia	1.95	1.88	2.40	1.52	-	2.72	1.10
Length of tarsus	4.84	5.72	4.64*	0.50*	-	7.60	2.21
Tarsomere 1	1.13	1.32	1.80	0.50	-	2.08	0.45
Tarsomere 2	1.13	1.32	2.00	-	-	1.88	0.45
Tarsomere 3	1.05	1.48	0.84*	-	-	1.64	0.50
Tarsomere 4	1.15	1.20	-	-	-	1.44	0.48
Tarsomere 5	0.38	0.40	-	-	-	0.56	0.33
Length of right middle leg	-	3.52	-	4.28	-	7.24	3.86
Length of femur	-	1.32	-	1.52	-	2.88	1.58
Length of tibia	-	0.40	-	1.20	-	1.60	0.85
Length of tarsus	-	1.80	-	1.56	-	2.76	1.43
Tarsomere 1	-	0.40	-	0.60	-	0.88	0.30
Tarsomere 2	-	0.44	-	0.32	-	0.68	0.40
Tarsomere 3	-	0.40	-	0.24	-	0.52	0.30
Tarsomere 4	-	0.40	-	0.22	-	0.32	0.23
Tarsomere 5	-	0.16	-	0.18	-	0.36	0.20
Length of left middle leg	2.11*	3.52	3.48*	4.31	4.09	7.28	3.84
Length of femur	-	1.32	1,80	1.52	1.63	2.92	1.55
Length of tibia	0.63*	0.40	1.04	1.21	1.00	1.64	0.85
Length of tarsus	1.48	1.80	0.64*	1.58	1.46	2.72	1.44
Tarsomere 1	0.35	0.40	0.64*	0.62	0.44	0.80	0.30
Tarsomere 2	0.50	0.40	-	0.34	0.45	0.72	0.40
Tarsomere 3	0.25	0.40	-	0.22	0.13	0.48	0.33
Tarsomere 4	0.20	0.40	-	0.20	0.21	0.36	0.20
Tarsomere 5	0.18	0.20	-	0.20	0.23	0.36	0.20
Length of right hind leg	3.52	3.10	-	4.52	2.68*	6.84	3.54
Length of femur	1.36	1.32	-	1.68	1.45	2.48	1.63
Length of tibia	0.78	0.40	-	1.10	0.90	1.64	0.70
Length of tarsus	1.38	1.38	-	1.74	0.33*	2.72	1.21
Tarsomere 1	0.35	0.44	-	0.46	0.33	0.88	0.30
Tarsomere 2	0.33	0.36	-	0.44	-	0.72	0.30
Tarsomere 3	0.25	0.22	-	0.38	-	0.48	0.20
Tarsomere 4	0.20	0.16	-	0.24	-	0.36	0.18
Tarsomere 5	0.25	0.20	-	0.22	-	0.28	0.23
Length of left hind leg	3.43	3.43	3.40*	4.42	3.01*	6.84	3.65
Length of femur	1.30	1.32	1.92	1.72	1.48	2.48	1.65
Length of tibia	0.75	0.44	0.84	1.06	0.88	1.60	0.75
Length of tarsus	1.38	1.36	0.64*	1.64	0.65*	2.76	1.25
Tarsomere 1	0.35	0.40	0.64*	0.42	0.30	0.84	0.30
Tarsomere 2	0.35	0.40	-	0.42	0.35*	0.76	0.35
Tarsomere 3	0.25	0.20	-	0.38	-	0.52	0.25
Tarsomere 4	0.18	0.16	-	0.22	-	0.32	0.15
Tarsomere 5	0.25	0.20	-	0.20	-	0.32	0.20
Length of right forewing	8.13	8.20	11.60	8.80	9.95	9.84	8.75
Length of left forewing	8.25	8.08*	11.80	8.60	6.88*	9.86	8.55
Length of right hind wing	3.15	2.70	3.60	-	3.25	3.50	2.75
Length of left hind wing	3.20	-	3.25*	2.92	3.30	3.52	2.80
Hind/forewings length ratio	0.39	0.39	0.31	0.34	0.33	0.36	0.32
Length of right cercus	4.25*	-	2.84*	2.24*	3.03	-	4.25*
Length of left cercus	4.20*	-	3.16*	2.32*	4.50	8.80	4.00*