Acanthocyrtus necropolitanus, Cipola & Greenslade, 2022

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 : 343-348

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.6410971
persistent identifier	https://treatment.plazi.org/id/0A09D803-FF82-2424-FF62-1A9BFE899ACC
treatment provided by	Plazi
scientific name	Acanthocyrtus necropolitanus
status	sp. nov.

Treatment

Acanthocyrtus necropolitanus View in CoL sp. nov.

Figs 2–7 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 , 12 View FIGURE 12 and Table 1 View Table

Diagnosis. Head and Abd III–IV with 1 lateral spot and Abd IV with 1 transveral spot posteriorly ( Fig. 2 View FIGURE 2 ); prelabral chaetae smooth ( Fig. 3D View FIGURE 3 ); head sutural series with 6 mac (S0, S2–6) and 5 interocellar chaetae ( Fig. 3F View FIGURE 3 ); labral inner papillae conical and outer papillae absent ( Fig. 3E View FIGURE 3 ); labial papilla E with l.p. finger-shape and surpass the base of a.a. ( Fig. 4A View FIGURE 4 ); basolateral labial field with chaetae M2 and R ciliate and smaller than the others ( Fig. 4C View FIGURE 4 ); Th II a, m and p series with about 35, 10–11 and 18–20 mac, respectively; Th III–Abd I with 11–12, 4, 2–3+1 and 1+4 mac respectively, Abd IV with 15–18 (3 unpaired) central and 17–18 lateral mac ( Fig. 5 View FIGURE 5 ); unguis b.t. subequal to m.t. and on almost distal in ⅓ of the unguis, and a.t. present; unguiculus with all lamella smooth and acuminate ( Fig. 6E View FIGURE 6 ); collophore anteriorly with 3 unequal distal mac ( Fig. 7A View FIGURE 7 ); manubrium ventro-distal with 3 inner chaetae ( Fig. 7B View FIGURE 7 ); dens with 38–65 spines on two rows, dens bs2 present ( Fig. 7D View FIGURE 7 ). Mucro teeth subequal, basal spine surpassing the apex of the proximal tooth ( Fig. 7E View FIGURE 7 ).

Description. Total length (head + trunk) of specimens 1.57–3.89 mm (n=4), holotype 2.34 mm. Specimens yellowish with violet present from Ant I–IV, head anteriorly between the antennae and laterally; Abd III with one lateral spot which extends to Abd IV anteriorly, Abd IV with one transveral spot posteriorly and other spot on Abd V; Th II to Abd IV and femur I–III weakly with violet pigments or absent; eyespatches black ( Fig. 2 View FIGURE 2 ). Scales heavily ciliate, oval or elongated and apically rounded or pointed (rarely truncate or irregular) present on Ant I to proximal one third of Ant II, dorsal head, dorsal thorax and abdomen, legs (except empodia), and manubrium and dens ventrally.

Head. Antennae gently larger than trunk length ( Fig. 2 View FIGURE 2 ); ratio antennae: trunk = 1: 1.16–1.32 (n=4), holotype 1: 1.27; antennal segments ratio as I: II: III: IV = 1: 1.86–2.03: 1.59–1.81: 2.46–2.82, holotype 1: 1.94: missing: 2.82. Ant IV not annulated, with apical bulb apically bilobed, at least 4 sens types, 3 conical, 6 in finger-shape, 3 rods and numerous pointed sens ( Fig. 3A View FIGURE 3 ). Ant III sense organ with 2 club-shaped sens, 3 spiny guard sens, 1 conical and 1 finger-shape sens, at least 6 pointed sens and ciliated chaetae ( Fig. 3B View FIGURE 3 ); dorsally with about 9 elongated thin sens and ventrally with 1 proximal mac apically acuminate ( Fig. 3C View FIGURE 3 ). Ant II dorsally with 2–4 mac and 2 elongated thin sens distally; ventrally with 3 mac apically acuminate ( Fig. 3C View FIGURE 3 ). Ant I dorsally with 1–2 median mac and 3 smooth mic at base ( Fig. 3C View FIGURE 3 ). Clypeal formula with 4 (l1–2), 6 (f), 5 (pf0–2) ciliate chaetae, l1–2 larger, l1 apically acuminate, 4 f smaller, others subequal ( Fig. 3D View FIGURE 3 ). Labral a1 chaeta normal, m0–1 and p0–2 larger. Labral inner papillae conical and with one apical projection; outer papillae about a small rounded projection ( Fig. 3E View FIGURE 3 ). Eyes subequals, except G and H gently smaller, others subequal, and with 5 ’IO’ chaetae (p, r, t, q, s); head dorsal macrochaetotaxy with 7–8 An, 4 A, 3 M, 6 S, 4 Pa, 2 Pm, 3 Pp, and 1 Pe mac ( Fig. 3F View FIGURE 3 ). Labial papilla E with l.p. finger-shape and surpass the base of a.a. ( Fig. 4A View FIGURE 4 ). Maxillary palp with smooth t.a. and b.c. and subequal in length ( Fig. 4B View FIGURE 4 ). Basolateral and basomedian labial fields with chaetae M1–2, R, E, L1–2 ciliate, M2 and R smaller ( Fig. 4C View FIGURE 4 ). Ventral head with at least 80 ciliate chaetae, 13 larger and thicker, 15 smaller, and about 53 subequals; postlabial formula with 4 (G1–4), 3 (X2, X, X4), 4 (H1–4), 4 (J1–4?) chaetae; cephalic groove with 8 chaetae ( Fig. 4D View FIGURE 4 ).

Thorax chaetotaxy ( Fig. 5A View FIGURE 5 ). Th II a, m and p series with about 35 (anterior chaetal collar omitted), 10–11 and 18–20 mac, respectively. Th III a, m and p series with 1, 2 and 8–9 mac, respectively. Ratio Th II: III = 1.75–1.50: 1 (n=4), holotype 1.75: 1.

Abdomen chaetotaxy ( Figs 5B–C View FIGURE 5 ). Abd I a, m and p series with 0, 4 and 0 mac, respectively. Abd II a, m and p series with 0, 3–4 and 0 mac, respectively; a5 and m2 bothriotricha with 7 and 5 accessory chaetae respectively.Abd III a, m and p series with 0, 4 and 1 mac, respectively; m2 bothriotrichum with 5 accessory chaetae, and a5 and m5 bothriotricha with 13 accessory chaetae between them. Abd IV with 3 unpaired mac (atypical), 12–15 central mac of A–T series and 17–18 lateral mac of E–Fe series; 14 sens (as, ps and other type I, and 11 type II) and posteriorly about 16 posterior mes (1 unpaired). Abd V a, m and p series with 3, 3 and 7 mac, respectively. Ratio Abd III: IV = 1: 5.02–5.92 (n= 4), holotype 1: 5.59.

Legs. Subcoxa I with one row of 4 chaetae and 2 psp; subcoxa II with an anterior row of 8–10 chaetae and about 13 anterior chaetae; posterior row of 3–4 and 2 psp; subcoxa III with one row of 8–9 chaetae, about 27 anterior chaetae and 2 posterior psp ( Figs 6A–C View FIGURE 6 ). Trochanteral organ with about 29 spine-like chaetae ( Fig. 6D View FIGURE 6 ). Tibiotarsus I–III normal pr subdivided on distal two third; tibiotarsal smooth chaeta subequal than the unguiculus, tenent hair capitate and 0.90 smaller than the unguis outer edge; pretarsus with one minute anterior and one posterior smooth chaeta ( Fig. 6E View FIGURE 6 ). Unguis I–III with 4 inner teeth, b.t. subequal to m.t. and on almost distal ⅓ of unguis inner side, m.t. on distal ¼, a.t. minute and on distal 1 / 7; outer side with 3 teeth, 2 paired large laterobasal teeth and one unpaired proximal tooth. Unguiculus I–III with all lamellae (ae, ai, pe, pi) smooth and acuminate ( Fig. 6E View FIGURE 6 ); ratio unguis: unguiculus = 1: 0.51 in holotype.

Collophore (7A). Anterior side with about 16 ciliate chaetae, 14 widely distributed of subequal length, distally 3 unequal acuminate mac; posterior side with about 19 chaetae, 18 ciliate chaetae (3 unpaired) widely distributed of subequal length, and 1 distal smooth chaeta; lateral flap with about 14 chaetae, 5 smooth and 9 ciliate.

Furcula. Manubrium ventrally with 3 subapical and 10–12 apical scales elongated plus 3 inner ciliate chaetae per side ( Fig. 7B View FIGURE 7 ); manubrial plate with 6–7 ciliate chaetae of different sizes (3 mac) and 2 psp ( Fig. 7C View FIGURE 7 ). Dens basal half with 38–65 (holotype with 60–65) dorsal spines striated on two inner rows; bs1 and pi as spine-like chaetae, bs2 as spine ( Fig. 7D View FIGURE 7 ).

Type Material. Holotype female in slide ( NMV): Australia, Western Australia, Perth municipality, South Guildford, Guildford Cemetery , near to Kalamunda road, 31°55’05”S, 115°58’46”E ( Fig. 12 View FIGURE 12 ), 15 m., 21–22.iii.2015, pitfall-trap, C Taylor coll. GoogleMaps 12 paratypes: 2 males and 1 female on slides and 2 specimens in alcohol ( NMV) plus 1 male on slides ( INPA-CLL000121 ), same date as holotype; GoogleMaps 1 male and 3 females on slides ( NMV) plus 2 females on slides ( INPA-CLL000122-23 ), GoogleMaps same date as holotype, except vegetation adjacent of the Perth Airport, 31°55’18”S, 115°58’36”E, 13 m. GoogleMaps