Relictanum
Creators: name: Miranda, Gil Felipe Gonçalves
name: Marshall, Stephen A.
name: Skevington, Jeffrey H.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Relictanum

description: Relictanum species key
1. Metatarsus entirely dark; female occiput usually with dorsal scale-like white pile.................................. 5
- Metatarsus bicoloured (dark and pale) (Fig. 44 g); female occiput with dorsal black pile.............................. 2
2. Frontal triangle with silvery white pollen restricted to margins and continuous with facial pollen.................................................................................................... Relictanum fiametta [Panama]
- Frons/frontal triangle with silver pollinosity forming a lateral pair of semi-circles, usually not connected to facial pollen... 3
3. Males................................................... Relictanum crassum, or R. johnsoni (males unknown)
- Females............................................................................................ 4
4. Female 5th abdominal segment sub-quadrate, only slightly wider than long (around 1.1 times as wide as long).................................................................. Relictanum johnsoni [Guyana, Ecuador, Peru and Trinidad]
- Female 5th abdominal segment rectangular, more than 2 times as wide as long............................................................................... Relictanum crassum [Colombia, east to Guyana and south to central Brazil]
5. Fourth abdominal tergite uniformly pigmented, without pale markings (Fig. 44 g).................................. 8
- Fourth abdominal tergite with central pale vittae or spots (Fig. 46 b)............................................ 6
6. Fourth abdominal tergite with central pale vittae.................. Relictanum schwarzi [Costa Rica, Colombia and Peru]
- 4th abdominal tergite with 6 pale spots, 2 baso-laterally and 4 centrally.......................................... 7
7. Third abdominal tergite with 4 pale spots (Figs. 42 a–b)............................. Relictanum adspersitum [Brazil]
- Third abdominal tergite with 6 pale spots (Figs. 46 a–b).......... Relictanum magisadspersum [Costa Rica and Venezuela]
8. Male frontal triangle with black pile, female frons with white pile; dorsal ⅓ of frons as narrow as vertex; lateral ocelli on female touching eye margin; wing entirely microtrichose, entirely light brown (male) or mainly hyaline (female); alula linear and twice the width of the c cell................................ Relictanum nero [Mexico and south to central Brazil]
- Frons/frontal triangle usually with white pile; dorsal ⅓ of frons wider than vertex; lateral ocelli on female distanced from eye margin; wing usually with basal cells bare, if entirely microtrichose then wing with basal ½ dark and distal ½ hyaline; alula convex and 3 times the width of c cell.................................................................... 9
9. Wing dark on basal ½, entirely microtrichose; only known from females................................................................................................. Relictanum shropshirei [Mexico and south to Venezuela]
- Wing entirely infuscated, with bare basal cells................. Relictanum braziliensis [Brazil, Mexico and Puerto Rico]
description: Published as part of Miranda, Gil Felipe Gonçalves, Marshall, Stephen A. & Skevington, Jeffrey H., 2014, Revision of the genus Pelecinobaccha Shannon, description of Relictanum gen. nov., and redescription of Atylobaccha flukiella (Curran, 1941) (Diptera: Syrphidae), pp. 1-154 in Zootaxa 3819 (1) on page 87, DOI: 10.11646/zootaxa.3819.1.1, http://zenodo.org/record/251284