Fannia

Domínguez, M. Cecilia & Aballay, Fernando H., 2014, An updated key to the species of Fannia Robineau-Desvoidy (Diptera: Fanniidae) of Southern South America, and the description of a new species from Mendoza, Argentina, Zootaxa 3795 (2), pp. 152-160 : 156-158

Key to the species of Fannia of Southern South America ( Argentina & Chile)

Males

(Male of F. pu s i l l a is unknown)

1 Hind coxa bare at apex of posterior surface................................................................. 2

- Hind coxa setulose at apex of posterior surface ( Fig. 7 )....................................................... 10

2 Antennae and palpi brown, dark grey or black, never yellow. Ground colour of body black to steely blue, with dark brown pruinosity or dark grey with light blue pruinosity. Fore-tarsomeres partially or totally white flattened and expanded ( Fig. 8 ). Mid tarsomere 1 with a basal ventral crest, followed by a short strong seta............................................ 3

- Antennae and palpi yellow. Ground colour of body grey fore tarsomeres or yellow, never flattened and expanded. Mid tarsomere 1 lacking basal ventral crest.......................................................................... 8

3 Fore tarsomere 1 and 2 completely white, except for a black spot on fore tarsomere 1 at base, remaining tarsomeres black. Basal ventral crest and setae of mid tarsomere 1 short, shorter than width of tarsomere. Lacking ventral protuberance on F3, only with a preapical tuft of short and thin pv ............................................. .. F. anthracina (Walker)

- Fore tarsomeres 1 to 4 mostly or completely white or yellowish-white. Basal ventral crest and setae of mid tarsomere 1 longer than or as long as width of tarsomere. F3 with a medial or preapical ventral protuberance bearing dense tufts of v or pv ( Fig. 9 ).................................................................................................... 4

4 Eyes densely setulose; pra short and stout. All fore tarsomeres flattened and expanded, completely yellowish-white. Ventral protuberance of F 3 in medial position. T3 preapically flattened and expanded, with numerous curled and flat av, and short, thin and dense preapical pv and p ( Fig. 9 )......................................................... F. schnusei Stein

- Eyes bare or weakly haired. pra longer and thin. Only some fore tarsomeres expanded and flattened, yellowish-white. Ventral protuberance of F3 situated in apical third. T3 without modifications in shape, with 2 to 3 av, lacking pv ................. 5

5 Calypteres white or yellow in outer margin................................................................. 6

- Calypteres brown in outer margin......................................................................... 7

6 Frons at narrowest point 2x width of anterior ocellus. Fore tarsomere 1 expanded at apex and lacking leaf-like spine, tarsom- eres 2 to 5 completely expanded and flattened. T2 with 2 ad and 2 pd. T3 with 2 to 3 ad. Scutum and abdomen dark, with a lit- tle thin even pale dust..................................................................... .. F. b i g o ti (Stein)

- Frons at narrowest point less than 2x width of anterior ocellus. Fore tarsomeres weakly flattened and expanded, fore tarsomere 1 with a broad leak-like spine at tip of posterior surface. T2 with 1 ad and 1 pd. T3 with 1 ad. Scutum with four light-grey dusted vittae and a broad prescutellar patch, abdomen wholly light grey dusted except for some triangulated markings on all tergites................................................................................. F. albitarsis Stein

7 T1 completely dark, 2x length of fore tarsomere 1; fore tarsi long and thin. T2 more or less straight, twice as long as mid tar- somere 1, with a long apical v. Hind femur with several strong av alongside tubercle................... F. setosa (Bigot)

- T1 yellow at tip, 4x length of fore tarsomere 1, the tarsomeres rather short and compressed. T2 bent at basal third, 4x length of mid tarsomere 1, with 1 short apical v. F3 with 1 to 2 av alongside protuberance.............. F. confusa Pont & Carvalho

8 Frontal vitta at narrowest point 1.5x width of anterior ocellus. Parafacial completely covered with short setae. Scutum lacking brown vittae. 1 pra dorsad spal, 0.33 length of same. Sternite 1 with numerous long setae. Cercal plate bearing very long and conspicuous setae, visible in ventral view................................................... F. flavicornis Stein

- Frontal vitta very narrow, reduced to a line ( Fig. 10 ). Parafacial bare. Scutum with brown vittae. 2 pra near spal. Sternite 1 with few setae. Setae of cercal plate not visible in ventral view...................................................... 9

9 Hind femur with a very weak preapical protuberance on posteroventral surface, with a conspicuous tuft of setae that are slightly longer than femoral width ( Fig.1 )............................................... F. fusconotata (Rondani)

- Hind femur lacking preapical protuberance on posteroventral surface and its associated tuft of setae ( Fig. 2 ).. F. puxcu sp. n.

10 T3 with 1 row of pv. Light grey in ground colour and light blue dusted..........................................11

- Lacking row of pv on T3. With other colouring............................................................. 12

11 C2 with 2 strong hooked setae laterad, and 1 strong vaguely hooked apical seta. T2 with a strong triangulated anteroventral crest on apical half. T3 with 3 to 4 pv in medial third......................................... F. scalaris (Fabricius)

- C2 lacking hooked setae. T2 without crest on apical half. T3 with 4 to 6 pv in medial third........ F. incisurata (Zetterstedt)

12 Abdomen trimaculated................................................................................ 13

- Abdomen with different colour pattern.................................................................... 17

13 Parafacial with setae..................................................................................14

- Parafacial bare.......................................................................................16

14 F3 lacking preapical posteroventral protuberance............................................. F. femoralis (Stein)

- F3 with preapical posteroventral protuberance.............................................................. 15

15 F3 not dorsoventrally flattened and with a weak preapical posteroventral protuberance, T3 with numerous long and hair-like rows of v........................................................................... F. pusio (Wiedemann)

- F3 dorsoventrally flattened and with a very strong preapical posteroventral protuberance ( Fig. 11 ), T3 lacking numerous long and hair like rows of v ..................................................... F. yunguensis Quiroga & Domínguez

16 Eyes scarcely pilose. Two strong pra, near spal. T3 with a preapical protuberance only visible on posterior surface; 1 short row and a short hair-like subapical tuft of pv ................................................. F. punctiventris Malloch

- Eyes bare. Two pra, one very thin and short near the spal and the other stouter and longer, near the transverse suture. T3 lack- ing preapical protuberance, and bare on posteroventral surface.................................... F. flavipalpis Stein

17 Wing clear, abdomen yellow on lateral margins of tergites 1–3................................................. 19

- Wing smoky. Abdomen yellow on lateral margins of tergites or not............................................. 18

18 Abdomen completely black, with darker markings on central longitudinal line and apex of tergites. T3 with two d: one sub- medial and one apical................................................................................ 25

- Abdomen yellow on lateral margins of tergites. T3 only with 1 dorsal seta (the submedial), lacking subapical ( Fig. 12 )............................................................................... F. sanihue Dominguez & Aballay

19 Upper orb present.................................................................. F. canicularis (Linnaeus)

- Upper orb absent..................................................................................... 20

20 Parafacial with strong setae throughout. Thorax lacking vittae..................... F. petrocchiae Shannon & Del Ponte

- Parafacial lacking strong setae. Thorax with vittae..........................................................21

21 C3 with 4 to 5 long and stout setae at apex of posterior surface. Hypopygium protruding ( Fig.7 )................................................................................................... F. coxata Shannon & Del Ponte

- Apex of posterior surface of C3 lacking such setae. Hypopygium not protruding................................... 22

22 T2 with 1 truncate apical pd ( Fig. 13 ). Hind tarsomere 1 expanded and flattened ( Fig. 14 )............ .. F. r o i g i Domínguez

- T2 never with truncate apical pd. Hind tarsomere 1 normal in shape............................................. 23

23 Scutum brown, lacking vittae along acr and dc lines.......................................... F. tumidifemur Stein

- Scutum brown with grey vittae along acr and dc lines........................................................ 24

24 F2 with 2 rows of pv hooked at base, forming a dense ctenidium of 4 to 5 rows in apical fourth..................................................................................................... F. tucumanensis Albuquerque

- F2 with 2 rows of hooked pv, lacking apical ctenidium.................................... F. heydenii (Wiedemann)

25 Body length 5 to 7 mm. Wings smoky, dark in upper half of the space between R1 and R 2+3 ( Fig. 15 ). Halteres black. F3 with 1 row of very short pv, not visible in anterior view........................................................... 26

- Body length 3 to 4 mm. Wings smoky, clear in upper half of the space between R1 and R 2+3. F3 with 1 row of long and hairlike pv, visible in anterior view...................................................... F. losgateados Domínguez.

26 F3 with two complete rows of av, one long and the other short and hair-like. Surstylus with a lobate process bearing very short setulae in basal region............................................................... F. hermani Domínguez

- F3 with a single row of av. Surstylus lacking lobate processes at base............................ F. hirtifemur (Stein)

Figures

FIGURES 7 – 16. F. coxata Shannon & Del ponte: male hind coxa and abdomen, lateral (7); F. schnusei Stein: male fore tarsi, dorsal (8); male hind leg, anterior (9). F. fusconotata (Rondani): male head, anterior (10); F. yunguensis Quiroga & Domínguez: male hind leg, anterior (11); F. sanihue Domínguez & Aballay: male hind leg anterior (12); F. roigi Domínguez: male mid tibia, posterior (13); male hind leg, anterior (14); F. hermani Domínguez; wing (15).

FIGURES 1 – 5. 1. Fannia fusconotata Rondani: male hind leg, posterior. 2 – 5. Fannia puxcu sp. n.: male hind leg, posterior (2); male sternite 5, ventral (3); male hypandrium (4) male genitalia external structures, ventral (5); male genitalia external structures, lateral (6).