taxonID	type	description	language	source
03CA8783FFA78F0AFF50FE29FAC661D5.taxon	description	Egg Figs 1, 11 Width = 587.4 ± 36.61 µm; length = 1.08 ± 0.03 mm (n = 10). First instar larva Figs 2 − 6, 11, Supplementary Material 1 Body width = 679.5 ± 55.42 µm; body length = 0.996 ± 0.08 mm (n = 10). Body features. Body with regularly rounded sides. Four longitudinal grooves present dorsally (Fig. 2 A) dividing dorsal body surface into five main longitudinal fields: one medial, two lateral and two external fields. Medial field partially divided into two halves by a longitudinal, medial line. Dorsal surface with regularly spaced “ flower-like ” sensilla (Figs 3 A, E): medial field with two longitudinal rows of nine sensilla; each lateral field with 13 sensilla arranged in two rows (seven along lateral groove and six along medial groove); each external field with one row of 10 sensilla. Each sensillum (Fig. 3 E) composed of a cylindrical base, with many imbricate, thick sculpticels, apically with a medial flower-like structure with a variable number (5 – 10) of long lobes, pointed at tip, encircling a medial dome. Ventral surface covered medially by pointed microsculpture, finely pilose on sides. Ventral flower-like sensilla (Figs 3 C, G) similar to dorsal ones except for flat, soft, unsculptured base and flat, thin, distinctly pointed lobes. Pseudocephalon. Two pairs of sensorial organs on dorsal surface of pseudocephalon (Figs 4 E, G), one anterior (Fig. 4 E) and one posterior (Fig. 4 G), each composed of clusters of four short and one long trichoid sensilla emerging from bulbous, hollow base. Posterior spiracular tubercle. Impair respiratory structure, elongated in shape; surface of spiracular tubercle with peculiar microsculpture, completely covered by imbricate, sclerotised scales with an irregularly indented apex (Fig. 5 A). Apex of tubercle with two circular smooth plates, slightly convex (Fig. 5 C). Marginal band. Distinctly long fringe, length of processes regularly varying, showing eight waves on each side (Figs 2 A, E, 6 A, C, E). Each individual process composed of an elongate stem and an apical fringed brush (Figs 6 A, C, E); the stem showing two very different surfaces: dorsal surface apparently articulated with 4 – 5 imbricated joints, the distal one fringed apically (Figs 6 A, E); ventral surface completely smooth (Fig. 6 C). Third instar larva Figs 7 − 9, 11 Body width = 4.5 ± 0.7 mm; body length = 6.1 ± 0.8 mm (n = 10). Dorsal reticulation. Dorsal reticulation reduced to a narrow, lateral belt around the perimeter of abdomen (Figs 7 A, B). Each reticulation process showing sub circular groups of 5 – 9 umbrella-like structures with a flattened, circular apex (Figs 7 A, B). Posterior spiracular tubercle. Dome shaped with two round holes spaced 1.2 times as long as their diameter; apex divided into two halves (Figs 8 A, B) by a narrow furrow showing irregular plates. Marginal band. Processes on the marginal band short and thick, set close to one another, parallel, radially projecting, with suboval basal “ joints ”, not imbricated, the last one produced into a flat medial brush. Processes on the marginal band of three types (Figs 9 A, B): type one basally 4 – jointed and apically single and flat, with medial brush 2 – lobed; type two basally 3 – jointed and apically bifurcate, with medial brush 1 – lobed; type three basally 3 – jointed and apically produced into a group of three spiniform setae. Type one and type two regularly alternating in sequence, type three irregularly present between two type one processes. Puparium Figs 10, 11 Body width = 6.1 ± 0.5 mm; body length = 7.9 ± 0.7 mm (n = 10). Anterior spiracular tubercles. Length of each tubercle about 1.4 times as long as wide, conical, tapering at the apex (Fig. 10 A, B), smooth at the base, with the apex furrowed by about 150 respiratory fissures (Figs 10 A); each fissure laying on a small papilla (Fig. 10 B).	en	Scarparo, Giulia, Wolton, Robert, Molfini, Marco, Pinna, Luigi Cao, Ulio, Andrea Di Gi- (2020): Comparative morphology of myrmecophilous immature stages of European Microdon species (Diptera: Syrphidae): updated identification key and new diagnostic characters. Zootaxa 4789 (2): 348-370, DOI: 10.11646/zootaxa.4789.2.2
03CA8783FFAB8F0FFF50F899FE8C638C.taxon	description	Egg Fig. 1 Width = 450.71 ± 52.89 µm; length = 897.41 ± 59.72 µm (n = 10). First instar larva Figs 2 − 6, Supplementary Material 2 Body width = 456.23 ± 29.41 µm; body length = 900.77 ± 75.14 µm (n = 10). Body features. Body rounded anteriorly and posteriorly, but subparallel on sides. Two longitudinal grooves present dorsally (Fig. 2 B), dividing dorsal body surface into three main longitudinal fields: one medial, two external marginal fields. Dorsal surface adorned with raised sculpture and showing 62 regularly spaced flower-like sensilla (Fig. 3 B) distributed as follows: medial field with two longitudinal rows of nine sensilla; each marginal field with 22 sensilla. Each flower-like sensillum (Fig. 3 F) composed of a long cylindrical base, apically with a medial flower-like structure with a variable number (6 − 7) of short lobes not exceeding the diameter of the base. Ventral surface without hairy microsculpture, showing transverse twisted protuberances (Fig. 3 D). Ventral flower-like sensilla (Fig. 3 H) dome-shaped, with an unsculptured simple base, without radial lobes. Pseudocephalon. Distal segment of the antenna distinctly narrowed at the apex (Figs 4 B, D). Posterior sensorial organs on dorsal surface of pseudocephalon composed three short trichoid sensilla emerging from bulbous base (Fig. 4 H). Posterior spiracular tubercle. Impair structure, short, bilobed. Surface of spiracular tubercle with microsculpture composed by thick, pointed, slightly imbricated scales (Figs 5 B, D, F). Apex with depressed plates, laterally produced into four spikes: posterior spikes longer than the anterior (Figs 5 D, F). Marginal band. Distinctly short fringe, showing 10 waves on each side (Figs 6 B, D, F). Each simple process smooth both dorsally and ventrally (Figs 6 B, D, F). Third instar larva Figs 7 – 9 Body width = 6.41 ± 0.64 mm; body length = 8.25 ± 0.54 mm (n = 10). Dorsal reticulation. Dorsal reticulation extended over the whole dorsal body surface. Each process divided into a dome-shaped basal disk supporting a branched spine (Figs 7 C, D). Spines 2 – branched not articulating with disk; processes disposed in 1 – 2 rows; trumpet-shaped tubercles (Fig. 7 D) in 2 – 3 concentric circles on basal disk around spine base; dorsal spine branches intertwined extensively with branches originating 3 – 4 spines away. Dorsal flower-like sensilla with cylindrical smooth base and 3 – 4 lobes radiating from apex, lacking the central dome (Fig. 7 D), always present at intersections of process rows and extending well above spines; each sensillum 4 – 5 times height of undivided spine base, 2 – 3 times length of processes. Posterior spiracular tubercle. Slightly wider than long structure, subrectangular both in dorsal and anterior views, concave medially (Figs 8 C, D), with two round holes spaced 1.2 times as long as their diameter. Base of posterior spiracular tubercle encircled by a smooth cuticular crown. Spiracular plates flattened to slightly convex, of variable shape, separated by a broad and deep midsagittal cleft (Figs 8 C, D). Marginal band. Processes on the marginal band apparently without basal articulated joints (Figs 9 C, D). Puparium Figs 10, 11 Body width = 7.4 ± 0.4 mm; body length = 9.2 ± 0.3 mm (n = 10). Anterior spiracular tubercles. Length of each tubercle about three times as long as wide, subcylindrical, with sides entirely and strongly wrinkled, blunt at the apex, with the apex furrowed by about 30 respiratory fissures (Figs 10 C, D). Each fissure laying on a small papilla (Fig. 10 D).	en	Scarparo, Giulia, Wolton, Robert, Molfini, Marco, Pinna, Luigi Cao, Ulio, Andrea Di Gi- (2020): Comparative morphology of myrmecophilous immature stages of European Microdon species (Diptera: Syrphidae): updated identification key and new diagnostic characters. Zootaxa 4789 (2): 348-370, DOI: 10.11646/zootaxa.4789.2.2
03CA8783FFAD8F0DFF50FA4FFF4A61DE.taxon	description	Third instar larva Figs 7 – 9 Body width = 7.2 ± 0.6 mm; body length = 9.4 ± 0.9 mm (n = 10). Dorsal reticulation. Dorsal reticulation extended over the whole dorsal body surface. Each process resembling a sea anemone, being divided into a smooth, columnar trunk topped by a brush composed by 20 – 30 long, flexible filaments (Fig. 7 F). Posterior spiracular tubercle. Longer than wide, subquadrate in dorsal view, concave medially, bulged sub – basally; distance between spiracular holes 1.8 times as long as their diameter (Figs 8 E, F). The base of posterior spiracular tubercle encircled by a smooth cuticular crown (Figs 8 E, F). Spiracular plates flattened to slightly concave, of variable shape, separated by a broad and deep midsagittal cleft. Marginal band. Processes on the marginal band apparently without basal articulated joints (Figs 9 E, F). Processes on the marginal band of three types: type one long and single, apically fringed; type two short and bifurcate, apically 2 – lobed; type three composed by two type one flanking a cluster of three spiniform setae (Figs 9 E, F). Puparium Figs 10, 11 Body width = 7.3 ± 0.4 mm; body length = 9.7 ± 0.5 mm (n = 10). Anterior spiracular tubercles. Length of each tubercle 2.25 times as long as wide and strongly curved (Fig. 11 F), subcylindrical, slender, somewhat pointed at the apex, entirely furrowed by about 180 respiratory fissures (Figs 10 E, F). Each fissure laying on a small papilla (Fig. 10 F).	en	Scarparo, Giulia, Wolton, Robert, Molfini, Marco, Pinna, Luigi Cao, Ulio, Andrea Di Gi- (2020): Comparative morphology of myrmecophilous immature stages of European Microdon species (Diptera: Syrphidae): updated identification key and new diagnostic characters. Zootaxa 4789 (2): 348-370, DOI: 10.11646/zootaxa.4789.2.2
03CA8783FFB18F12FF50F950FA056505.taxon	discussion	First instar larvae	en	Scarparo, Giulia, Wolton, Robert, Molfini, Marco, Pinna, Luigi Cao, Ulio, Andrea Di Gi- (2020): Comparative morphology of myrmecophilous immature stages of European Microdon species (Diptera: Syrphidae): updated identification key and new diagnostic characters. Zootaxa 4789 (2): 348-370, DOI: 10.11646/zootaxa.4789.2.2
03CA8783FFB18F12FF50F950FA056505.taxon	discussion	Puparia	en	Scarparo, Giulia, Wolton, Robert, Molfini, Marco, Pinna, Luigi Cao, Ulio, Andrea Di Gi- (2020): Comparative morphology of myrmecophilous immature stages of European Microdon species (Diptera: Syrphidae): updated identification key and new diagnostic characters. Zootaxa 4789 (2): 348-370, DOI: 10.11646/zootaxa.4789.2.2
