A revision of the four Afrotropical and Palaearctic Sphyracephala Say (Diptera, Diopsidae) with an illustrated overview of the other five Sphyracephala Author Feijen, Hans R. 0000-0002-7265-8448 Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, Netherlands Author Feijen, Frida A. A. 0000-0001-5872-8780 ETH Zürich, Department of Environmental Systems Science, Institute of Integrative Biology (IBZ), 8092 Zürich, Switzerland & EAWAG, Aquatic Ecology, Dübendorf, Switzerland Author Feijen, Cobi 0000-0001-8756-3903 Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, Netherlands text ZooKeys 2025 2025-06-10 1241 1 81 journal article 310381 10.3897/zookeys.1241.151490 b61e1f46-07df-41f0-84ab-1d49e78b9253 E0BA0012-F063-43B8-926B-8DD47010D489

Table 3. Quantitative characters for Sphyracephala species: ratio scutellar spine / scutellar length and ratio apical seta / scutellar spine. Species are arranged in species groups and subtaxa.

Sphyracephala		scutellar spine / scutellum	n	apical seta / scutellar spine	n
		ratio		ratio
* Both from Sulawesi, but perhaps not conspecific.
S. brevicornis	♀	0.65 ± 0.03	6	2.82 ± 0.06	6
	♂	0.64 ± 0.00	2	3.00	1
S. subbifasciata	♀	0.54	1	3.86	1
	♂	0.54	1	3.86	1
S. nigrimana	♀	0.75	1	3.22	1
	♂	0.65	1	2.82	1
S. babadjanidesi	♀	0.43 ± 0.01	28	5.36 ± 0.13	20
	♂	0.41 ± 0.01	40	5.50 ± 0.09	35
S. munroi	♀	0.43 ± 0.01	10	6.10 ± 0.22	10
	♂	0.44 ± 0.01	10	6.11 ± 0.11	9
S. hearseiana	♀	0.56 ± 0.01	12	3.60 ± 0.09	9
	♂	0.55 ± 0.01	10	3.71 ± 0.12	7
S. beccarii	♀	0.48 ± 0.01	15	3.91 ± 0.10	15
	♂	0.53 ± 0.01	10	3.85 ± 0.11	10
S. detrahens	♀	0.88	1	2.93	1
	♂	1.10 ± 0.26	2 *	2.64	1
S. bipunctipennis	♀	1.02 ± 0.02	4	2.50 ± 0.02	4
	♂	1.12	1
S. nr detrahens Solomon Islands	♀	0.98 ± 0.02	10	2.85 ± 0.10	6
	♂	0.97 ± 0.02	10	2.94 ± 0.10	6
S. nr detrahens Japan	♀	0.90 ± 0.01	6	2.38 ± 0.08	2
	♂	0.85 ± 0.04	4	2.86 ± 0.14	4