TABLE 1. Comparison of critical morphological characteristics of fossils of the genus Dilophus.
| D. idanos | D. crassicornis | D. palaeofebrilis | D. succineus | D. pumilio | D. matilei | D. krantzii | D. luteipennis | D. andrewrossi | D. pinguis | |
| Locality | Montana | Baltic | Baltic | Baltic | Germany | Dominican Republic | Germany | France | England | Croatia |
| Age | Middle Eocene | Late Eocene |
Late Eocene |
Late Eocene |
Miocene | Miocene | Oligocene | Oligocene | Late Eocene | Miocene |
| Matrix | Shale | Amber | Amber | Amber | Shale | Amber | Shale | Shale | Limestone | Limestone |
| Sex | M | M & F | M | M & F | F | M | M | F | M & F | |
| Body length (mm) | 3.7 | 3.6-3.7 (M); 4.3-5.1 (F) |
4.3-5.7 | 3.6 (M); 3.5 (F) |
4.5 | 3.8 | 11 | 5.5-6.0 | ND | 12.6 (M); 15 (F) |
| Head length (mm) | 0.52 | 0.57-0.62 (M); 0.62-0.77 (F) |
0.78-0.92 | 0.92 (M); 0.62 (F) |
0.8 | 0.65 | ND | 0.7 | ND | ND (M); 2.0 (F) |
| Palpus length (mm) | ND | ND | 0.38 | ND | ND | 0.56 | twice as long as flagellum | ND | ND | ND |
| Antenna length (mm) | 0.2 | 0.15 (M; flagellum) |
0.5 | 0.48 (M); 0.50 (F) |
ND | 0.53 | ND | ND | ND | ND |
| Number of flagellomeres | 6 | 6-7 (M); 7 (F) | 12 | 12 (M & F) |
6? | 7 | at least 8 | ND | ND | ND (M); “possibly six” (F) |
| Thorax L/W (mm) | 0.93/0.60 | 0.92-0.99/0.62 (M); 1.22-1.55/? (F) |
1.31-1.52/1.07-1.15 | 1.2/0.64 (F) |
1.4/? | 1.1/0.59 | ND | 1.3-1.5/1.4 | ND | 3.2 (M); 5.6 (F) |
| Wing L/W (mm) | 2.4/0.91 | 3.2-3.7/1.2 (M): 3.75/? (F) |
3.55/1.10 | 3.8/1.39 (F) |
3.8/1.5 | 2/0.8 | L = ̴8.6 mm (Fig.) or "about length of body" (text) | 3.8-4.5 (4.0-4.6)/1.5-1.7 (1.5-1.8) | 3.85/1.45 | 9.5/3.3 (M); 12.3/4.4 (F) |
| r-m:base of Rs | 3.2 | 2.1-2.5 (M); 1.3 (F) |
3 | ND | 2.1 | 4.5 | 0.47 | 0.6? | 2 | ND (M); 1 (F) |
| Fore tibial spines | 2:2:8 | 3:6 (M); 3:6 (F) |
1:2:8 | 2:3:6 (M & F) |
2:2:? or 2:3:? | 2:4:8 | Apex with ring of spines | 3? mesal | ?:?:2 | 2? mesally, small; fine & short apically (M); 3? mesally; 6? in circlet, short (F) |
| Mesonotal spines | 12 (anterior) and 10 (posterior) = 12 + 10 |
10 + ? (M); 8 + 2 + 8 (F) |
10-11 + 10 | ? + 10 (M); 10 + 10 (F) |
Vague trace |
2 rows of 10-12 each |
ND | Not visible | ND | ND (M); “short, stout (F) |
| Abdomen L/W (mm) | 2.3/0.45 | ND | ND | ND | 3.0/? | 2.14/0.52 | 6/? | 3.7-4.4/1.5 | ND | 8.3/2.1 (M); 10.1/ND (F) |
| Reference | Greenwalt and Fitzgerald, 2022 |
Skartveit, 2008 | Skartveit, 2008 | Skartveit, 2008 | Skartveit and Pika, 2014 | Waller, Nel and Menier, 2000 | Heyden, 1870 | Théobald, 1937; Skartveit and Nel, 2017 |
Krzemiński et al., 2019 | Heer, 1849; Skartveit & Krizmanic, 2020 |
