Key to Epopostruma Species

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The following key to Australian Epopostruma is based on Shattuck (2000).[1]. The species Epopostruma inornata, described in 2007, is included in this key.

1

  • Sides of postpetiole expanded laterally in the form of thin spines or "wings" => 2
  • Sides of postpetiole approximately vertical and rounding gradually from dorsal to posterior surfaces (although sometimes only anteriorly, the posterior corners forming spines or angles) => 3

2

  • In dorsal view the lateral postpetiolar extensions forming distinct sharp teeth or spines => 4
  • In dorsal view the lateral postpetiolar extensions solid and wing-like, or in one case, broadly rounded posterior angles => 5

3

  • Anterior face of postpetiole relatively long and flat compared to dorsal and posterior faces => Epopostruma monstrosa

Epopostruma monstrosa ANIC32-003700 head 50-AntWiki.jpg Epopostruma monstrosa ANIC32-003700 side 40-AntWiki.jpg

  • Anterior face of postpetiole similar in length to or shorter than the dorsal and posterior faces => 6

4

Epopostruma frosti ANIC32-003763 head 32-AntWiki.jpg Epopostruma frosti ANIC32-003763 side 25-AntWiki.jpg

  • Area immediately above the eye a rounded angle => 7

5

  • Humeral angles of pronotum rounded, lacking spines; dorsum of petiole, postpetiole and gaster lacking erect hairs => Epopostruma curiosa

Epopostruma curiosa holotype ANIC32-003998 head 63-AntWiki.jpg Epopostruma curiosa holotype ANIC32-003998 side 40-AntWiki.jpg

  • Humeral angles of pronotum armed with spines; dorsum of petiole, postpetiole and gaster with numerous erect hairs => 8

6

  • Anterior half of first gastral tergite smooth or nearly so, at most with only very weak, indistinct and generally widely spaced rugae => 9
  • Anterior half of first gastral tergite (and sometimes posterior half as well) distinctly sculptured (although often sculpturing very fine), sometimes resulting in a matte appearance => 10

7

  • Posterolateral margin of postpetiole (immediately anterior of gaster) flat to weakly concave => Epopostruma wardi

Epopostruma wardi holotype ANIC32-015699 head 40-AntWiki.jpg Epopostruma wardi holotype ANIC32-015699 side 25-AntWiki.jpg

  • Posterolateral margin of postpetiole (immediately anterior of gaster) strongly concave => Epopostruma lattini

Epopostruma lattini holotype ANIC32-003693 head 40-AntWiki.jpg Epopostruma lattini holotype ANIC32-003693 side 32-AntWiki.jpg

8

  • Posterior section of mesonotum forming a distinct angle with the dorsal face of propodeum so that the junction of these plates forms an obtuse angle => Epopostruma alata

Epopostruma alata holotype ANIC32-015340 head 63-AntWiki.jpg Epopostruma alata holotype ANIC32-015340 side 50-AntWiki.jpg

  • Posterior section of mesonotum in approximately the same plane as the dorsal face of propodeum so that the junction of these plates is either indistinct or in the form of a shallow trough or depression => 11

9

  • In dorsal view the posterolateral teeth of the postpetiole wider than the anterolateral teeth => Epopostruma areosylva

Epopostruma areosylva holotype ANIC32-003663 head 63-AntWiki.jpg Epopostruma areosylva holotype ANIC32-003663 side 50-AntWiki.jpg

  • In dorsal view the postpetiole either lacking lateral teeth, or when present, anterolateral and posterolateral teeth approximately the same width => 12

10

Epopostruma quadrispinosa ANIC32-003741 head 63-AntWiki.jpg Epopostruma quadrispinosa ANIC32-003741 side 50-AntWiki.jpg

  • In dorsal view the posterolateral corners of postpetiole forming thin, angular flanges => 13

11

Epopostruma angela holotype ANIC32-015341 head 50-AntWiki.jpg Epopostruma angela holotype ANIC32-015341 side 40-AntWiki.jpg

  • Lateral margins of postpetiolar wings generally flat or convex, occasionally weakly concave => 14

12

Epopostruma inornata holotype ANIC32-007280 head 63-AntWiki.jpg Epopostruma inornata holotype ANIC32-007280 side 63-AntWiki.jpg

  • Dorsum of petiole armed with distinct teeth => 15

13

  • In full face view the lateral margin of the head between the eye and the posterior corner forming a smooth curve => Epopostruma terrula

Epopostruma terrula holotype ANIC32-015697 head 50-AntWiki.jpg Epopostruma terrula holotype ANIC32-015697 side 40-AntWiki.jpg

  • In full face view the lateral margin of the head between the eye and the posterior corner divided by an angle => 16

14

Epopostruma avicula holotype ANIC32-015342 head 50-AntWiki.jpg Epopostruma avicula holotype ANIC32-015342 side 50-AntWiki.jpg

  • Gaster uniform golden brown or indistinctly banded with light and dark golden brown; known from Western Australia => 17

15

  • Petiolar teeth diverging slightly laterally; a row of short rugae present on the anterior margin of the gaster immediately behind the postpetiole; posterolateral corners of postpetiole with a weak angle; gaster uniform brown in colour; body colour generally brown (sometimes light brown) => Epopostruma natalae

Epopostruma natalae holotype ANIC32-015345 head 50-AntWiki.jpg Epopostruma natalae holotype ANIC32-015345 side 32-AntWiki.jpg

  • Petiolar teeth approximately vertical; gaster immediately behind the attachment of the gaster smooth; posterolateral corners of postpetiole drawn outwards into a short tooth; gaster yellow with a light to dark brown band; body colour dark yellow-red => Epopostruma vitta

Epopostruma vitta holotype ANIC32-015698 head 50-AntWiki.jpg Epopostruma vitta holotype ANIC32-015698 side 40-AntWiki.jpg

16

  • Dorsal surface of head infuscated with reddish-brown and notably darker in color than the more lightly coloured pronotum; known from New South Wales and southern Queensland => Epopostruma infuscocephala

Epopostruma infuscocephala holotype ANIC32-015343 head 50-AntWiki.jpg Epopostruma infuscocephala holotype ANIC32-015343 side 40-AntWiki.jpg

  • Dorsal surface of head uniform yellow-red and similar in colour to the pronotum; known from South Australia => 18

17

  • Petiolar spines well developed, distinct; bases of the propodeal spines and lobes not connected by flanges of any sort => Epopostruma mercurii

Epopostruma mercurii holotype ANIC32-015344 head 50-AntWiki.jpg Epopostruma mercurii holotype ANIC32-015344 side 40-AntWiki.jpg

  • Petiolar spines indistinct, reduced to sharp angles; posterior face of propodeum with broad, distinct flanges which connect the bases of the spines to the propodeal lobes => Epopostruma sowestensis

Epopostruma sowestensis holotype ANIC32-003773 head 50-AntWiki.jpg Epopostruma sowestensis holotype ANIC32-003773 side 40-AntWiki.jpg

18

  • Petiolar spines narrow, in dorsal view their tips only slightly broader than the width of the petiole; posterior margin of head deeply concave, the angle between its sides approximately 90°; postpetiole low, its anterior face weakly separated from the dorsal face => Epopostruma angulata

Epopostruma angulata holotype ANIC32-003764 head 50-AntWiki.jpg Epopostruma angulata holotype ANIC32-003764 side 40-AntWiki.jpg

  • Petiolar spines diverging, in dorsal view their tips broader than the width of the petiole; posterior margin of head shallowly concave, the angle between its sides approximately 70°; postpetiole high, its anterior face separated from the dorsal face by a broad, rounded angle => Epopostruma kangarooensis

Epopostruma kangarooensis holotype ANIC32-003699 head 63-AntWiki.jpg Epopostruma kangarooensis holotype ANIC32-003699 side 40-AntWiki.jpg

References

  1. Shattuck, S.O. (2000) The epopostrumiform genus group. pp. 30–67 in Bolton, B. The ant tribe Dacetini. Memoirs of the American Entomological Institute, 65, 1–1028.