Agyrtodini

Ashman, Lauren G., Seago, Ainsley E. & Leschen, Richard A. B., 2024, A new genus of Australian Agyrtodini from Tasmania (Coleoptera: Leiodidae: Camiarinae), Zootaxa 5453 (3), pp. 403-410 : 408-409

Key to Australian species of Agyrtodini

1 Size <1.5 mm; tarsi 4-4-5 segmented; eyes reduced ( Fig. 1c ).......................... Myopagyrtes tasmanicus (TAS)

- Size> 1.5 mm; tarsi 5-5-5 segmented; eyes not reduced ( Fig. 1b )............................................... 2

2 Mesoventrite flat or with vague obtuse elevation............................................................. 3

- Mesoventrite more or less carinate........................................................................ 4

3 Epistomal suture present, Y-shaped............................................. 5 ( Paragyrtodes Szymczakowski )

- Epistomal suture absent; protarsi pseudotriungulate in males..... Cholevomorpha picta Blackburn, 1891 (VIC, NSW, ACT)

4 Mesoventral carina low or, if elevated, curved in lateral view; elytra variously patterned and transversely striolate............................................................................................ 7 ( Agyrtodes Portevin )

- Mesoventral carina elevated, strongly angulate in lateral view; elytra bearing distinct S-shaped, tricolour pattern of white, dark brown, and light brown; elytra not transversely striolate.............. Agyrtolasia calliptera Szymczakowski, 1973 (NSW)

5 Elytra golden brown with distinct, dark brown hook-shaped maculations posteriolaterally............................ 6

- Elytral colour pattern not as above; typically uniform brown.... Paragyrtodes modestus Szymczakowski, 1966 (ACT, NSW)

6 Pronotum uniformly dark brown........................... Paragyrtodes candens Szymczakowski, 1966 (ACT, NSW)

- Pronotum dark brown at midline, pale golden brown laterally...... Paragyrtodes percalceatus Szymczakowski, 1966 (TAS)

7 Apical segment of maxillary palps enlarged (>3x as long as penultimate segment); large body size (2.5 mm or more in length); pronotum with paired median dark spots................................ Agyrtodes crassus Zwick, 1979 (QLD, NSW)

- Apical segment of maxillary palps not markedly wider than penultimate palpomere, body length less than 2.5 mm; pronotum without distinct, paired median dark spots.................................................................. 8

8 Distinct dorsal colour pattern of spots or fasciae............................................................. 9

- Dorsum indistinctly patterned or uniformly brown.......................................................... 13

9 Pronotum uniformly dark brown, elytra with three transverse dark brown chevron-shaped fasciae on disc................................................................................. Agyrtodes variegatus Jeannel, 1936 (NSW)

- Pronotum medium brown or partially dark brown, elytral disc (if patterned) with no more than two fasciae............. 10

10 Pronotum with long median and paired round, lateral dark spots, elytra with interrupted dark discal region, paired subscutellar dark spots flanking suture, integument sanguineous, body narrow-sided and convex..................................................................................................... Agyrtodes decoratus Zwick, 1979 (VIC)

- Pronotum without distinct dark spots, not patterned as above; body broadly ovate, not narrow or parallel-sided.......... 11

11 Pronotum dark yellow; elytra yellow basally, dark brown apically; antennomeres 7 and 9–11 dark brown, antennomere 8 yellow............................................................... Agyrtodes flaviceps Seago, 2009 (QLD)

- Pronotum brown; elytra with dorsal pattern of transverse, chevron-shaped dark brown fasciae; antennomeres 7–10 dark brown, antennomere 11 bright yellow, enlarged................................................................... 12

12 Elytra with two broad, transverse medium to dark brown fasciae across disc; male protarsi with first segment as wide as tibial apex; parameres extending well beyond apex of median lobe, armed with abundant long setae on internal faces................................................................................ Agyrtodes monteithi Seago, 2009 (QLD)

- Elytra with two acutely chevron-shaped, "interrupted", fasciae across disc, male protarsi with first segment considerably narrower than tibial apex; parameres scarcely extending beyond apex of median lobe, slender, subcylindrical, sparsely setose at apices................................................................ Agyrtodes newtoni Seago, 2009 (QLD)

13 Pronotum and elytra uniformly brown, elytra with or without two broad, nebulous fuscous fasciae; body compact, ovoid ... 14

- Dorsum with large, indistinctly delimited median dark patches on the pronotum and elytra disc, integument otherwise reddish-brown; body elongate, narrowly ovate.................................... Agyrtodes tasmanicus Zwick, 1979 (TAS)

14 Body size large (length> 2 mm), dorsum uniformly dark brown, lighter brown in faded specimens.................... 15

- Body size small to medium (length <2 mm), dorsum light reddish-brown or dark brown with lighter elytral bases and apices. .................................................................................................. 16

15 Elytral disc with multiple shallow, longitudinal strial impressions, antennomeres 1–6 robust, 1–2 ovate and broadly expanded; aedeagus very long, slender, cylindrical, with parameres extending no farther than apex of median lobe................................................................................. Agyrtodes eucalypti Zwick, 1979 (NSW, ACT)

- Elytral disc without longitudinal strial impressions, antennomeres 1–6 slender and cylindrical, 1–2>2x as long as wide; aedeagus short and triangular, with parameres extending well past apex of median lobe................................................................................................... Agyrtodes globosus Seago, 2009 (QLD)

16 Dorsum dark brown with lighter brown elytral bases and apices; antennal club segments broad, robust, antennomere 8 transverse, maxilla with broad lacinia bearing spore-brush................... Agyrtodes atropos Blackburn, 1903 (TAS, VIC, NSW)

- Dorsum light reddish-brown, elytra reddish-brown with indistinctly delimited transverse fasciae; antennae slender, cylindrical throughout, antennomere 8 longer than wide, maxilla with narrow, reduced lacinia lacking robust spore-brush........... 17

17 Body size small (1.6–1.9 mm), roundly ovate, antenna with terminal segment yellow; elytra always light reddish-brown with two transverse fuscous fasciae across disc................................ Agyrtodes koebelei Blackburn, 1903 (QLD)

- Body medium-small (1.8–2.0 mm), elongate-oval, antenna with all club segments medium to dark brown; elytral colouration reddish brown to dark brown, with subscutellar pale spots and discal pale fasciae delimited by light gold setae................................................................................ Agyrtodes variabilis Seago, 2009 (QLD)

Figures

FIGURE 1. Agyrtodini: (a) Myopagyrtes tasmanicus, new species, male, dorsal habitus (Length = 1.40 mm); (b) Agyrtodes tasmanicus Zwick, anterior view of head; (c). M. tasmanicus, anterior view of head.