Acanthocyrtus, Handschin, 1925

Cipola, Nikolas Gioia & Greenslade, Penelope, 2022, Two new species of Acanthocyrtus Handschin, 1925 (Collembola, Entomobryidae Entomobryinae) from Western Australia, Zootaxa 5124 (3), pp. 341-358 : 356

publication ID	https://doi.org/ 10.11646/zootaxa.5124.3.4
publication LSID	lsid:zoobank.org:pub:83E79ECE-70BB-4B88-BBBE-E8DC6565ED49
DOI	https://doi.org/10.5281/zenodo.6412886
persistent identifier	https://treatment.plazi.org/id/0A09D803-FF8F-242C-FF62-1B11FA139851
treatment provided by	Plazi
scientific name	Acanthocyrtus
status

Treatment

Key to species of Acanthocyrtus View in CoL

1 Tenent hair chavate ( Fig. 8E View FIGURE 8 ); Australian species............................................................ 2

- Tenent hair pointed; African species................................................ A. marginalis Salmon, 1956 View in CoL

2 Prelabral chaetae ciliate................................................................................ 3

- Prelabral chaetae smooth............................................................................... 4

3 Head with 7 sutural mac; Th II–III respectively with 9 and 7 mac in p1–3 complex; Abd I with 4 mac; Abd IV with 19 central mac.......................................................................... A. lineatus Womersley, 1934 View in CoL

- Head with 5 sutural mac; Th II–III respectively with 4 and 5 mac in p1–3 complex; Abd I with 2 mac; Abd IV with 15 central mac............................................................................ A. spinosus ( Schött, 1917) View in CoL

4 Labral papillae present ( Figs 3E View FIGURE 3 , 9C View FIGURE 9 )..................................................................... 5

- Labral papillae absent.................................................................................. 6

5 Head and Abd III–IV with lateral spots ( Fig. 2 View FIGURE 2 ); labral inner papillae conical, outer papillae reduced to a small rounded projection ( Fig. 3E View FIGURE 3 ); labial papilla E l.p. surpass the base of a.a. ( Fig. 4A View FIGURE 4 ); manubrium ventro-distally with 3 inner chaetae ( Fig. 7B View FIGURE 7 ) A. necropolitanus View in CoL sp. nov.

- Head and trunk depigmented ( Fig. 8 View FIGURE 8 ); labral inner papillae with 3 projections and outer papillae with 4 projections ( Fig. 9C View FIGURE 9 ); labial papilla E l.p. not reach the base of a.a. ( Fig. 9E View FIGURE 9 ); manubrium ventro-distal with 2 inner chaetae ( Fig. 11F View FIGURE 11 )................................................................................................ A. pallidus View in CoL sp. nov.

6 Ant IV apical bulb bilobed; Th II with 24 mac in p1–3 complex; Abd III with 5 lateral mac; Abd IV with 20 central mac; mucronal proximal tooth clearly smaller than distal, mucronal basal spine surpassing the proximal tooth........................................................................... A. barrowensis Zhang, 2009 View in CoL (in: Zhang et al. 2009)

- Ant IV apical bulb absent; Th II with 17 or less mac in p1–3 complex; Abd III with 4 lateral mac; Abd IV with 15 or less central mac; mucronal teeth subequal, mucronal spine reaching the apex of proximal tooth................................. 7

7 Head S1 and S4 mac present and Pe5 absent; labial basomedian field with 3 smaller chaetae (M2, R and RS); Th II with 6 and 17 mac respectively in m2 and p3 complex; unguis a.t. absent............ A. loftyensis Zhang, 2009 View in CoL (in: Zhang et al. 2009)

- Head S1 and S4 mac absent and Pe5 present; labial basomedian field with 1 smaller chaetae (M2, RS absent); Th II with 5 and 15 mac respectively in m2 and p3 complex; unguis a.t. present............. A. yolngui Zhang, 2009 View in CoL (in: Zhang et al. 2009)