Plumachaetas mamuensis, Oliveira & Greenslade & Bellini, 2019

Oliveira, Fábio G. L., Greenslade, Penelope & Bellini, Bruno Cavalcante, 2019, Four new species of Plumachaetas Salmon (Collembola: Entomobryoidea) from Oceania with comments on the genus and a key to species, Zootaxa 4706 (1), pp. 121-146 : 130-135

publication ID	https://doi.org/ 10.11646/zootaxa.4706.1.5
publication LSID	lsid:zoobank.org:pub:B5C7776D-DC1C-43BE-AEAE-3983F88A426D
DOI	https://doi.org/10.5281/zenodo.5623757
persistent identifier	https://treatment.plazi.org/id/0A6887FB-0E48-FFE6-5CBE-FE3B7883F97A
treatment provided by	Plazi
scientific name	Plumachaetas mamuensis
status	sp. nov.

Treatment

Plumachaetas mamuensis sp. nov. Oliveira, Bellini & Greenslade

Figs 3C View FIGURE 3 ; 5B,C,F,H View FIGURE 5 ; 6A,D,H View FIGURE 6 ; 7C View FIGURE 7 ; 8C View FIGURE 8 ; 9 View FIGURE 9 E–F; 10E–F; 11E–F; 12C; 13G,H,I; 14C,G,I,J; 15; Table 1 View TABLE 1

Type material. Holotype male, deposited at Australian Museum of Sydney on slide Nº AMS/ COLL 00000011 : Australia, North Queenslade , Polly Creek , Garradunga near Innisfail, 17°27’29”S, 146°01’10”E, Malaise Trap, 6–19.VI.2013, S.D. Gaimari & A.R. Cline coll, Lowland Mesophyll Vine Forest (13-08) GoogleMaps . Paratypes deposited at Australian Museum of Sydney on slide NºAMS/ COLL 00000012 : 1 female on slide, same data as holotype GoogleMaps . Paratypes deposited at South Australian Museum ( SAMA), Nº SAMA / COLL 00000010 , 1 specimen in ethanol, same data as holotype GoogleMaps .

Diagnosis. Tibiotarsi distal region dark blue ( Fig.3C View FIGURE 3 ). Ant.IV apical region lacking thick chaeta ( Fig.5B View FIGURE 5 ). Ant.I with 7 dorsal mac ( Fig.5F View FIGURE 5 ). Labral chaetae p0–1 longer than others (as in Fig.5H View FIGURE 5 ). Dorsal head chaetotaxy with 3 M and 1 Pi mac ( Fig.8C View FIGURE 8 ). Labial basolateral and basomedian fields with chaetae M1–2, R, E and L2 ciliated, others smooth ( Fig.6D View FIGURE 6 ). Th.II central region with 2 m and 9 p mac ( Fig.9E View FIGURE 9 ). Th.III central region with 13 mac ( Fig.9F View FIGURE 9 ). Abd.I with 6 mac ( Fig.10E View FIGURE 10 ). Abd.II with 6 central and 1 lateral mac ( Fig.10F View FIGURE 10 ). Abd.III with 2 central and 4 lateral mac ( Fig.11E View FIGURE 11 ). Abd.IV with 22–26 central and 8–11 lateral mac ( Fig.11F View FIGURE 11 ). Trochanteral organ with 54–55 spinelike chaetae ( Fig.14C View FIGURE 14 ). Ventral tube anterior region with 7 +7 distal mac ( Fig.13G View FIGURE 13 ). Mucro bidentate ( Fig. 14I View FIGURE 14 ).

Description. Body pale yellow to brownish on ethanol; Ant.III light bluish with dark blue pigment on proximal and distal Ant.III, whole Ant.IV, lateral Th.II–Abd.II, central Abd.III, latero-posterior Abd.IV, distal tibiotarsi and distal femora. Eyepatches dark ( Fig. 3C View FIGURE 3 ). Apically pointed strongly ciliate elongate scales covering Ant.I–II, dorsal and lateral head, dorsal trunk, legs, ventral manubrium and dentes; ventral tube devoid of scales. Body (head+ trunk) length of holotype 3348μm (trunk: 2683μm; head: 665μm).

Head. Antennae longer than body length ( Fig.3C View FIGURE 3 ). Holotype antennae lengths: 5212μm (Ant.I= 1127 μm; Ant.IIV= 1343 μm, Ant.III = 1012 μm, IV= 1730 μm). Ant.IV not annulated with at least two types of chaetae: blunt sensilla and normal ciliate chaetae of different sizes, without thick apical chaeta ( Fig.5B View FIGURE 5 ). Ant.III apical sense organ with 2 small sensory rods in cavity plus 3 surrounding guard sensilla ( Fig.5C View FIGURE 5 ). Ant.I with 7 dorsal mac ( Fig.5F View FIGURE 5 ). Prelabral chaetae (4) ciliate, labral chaetotaxy formula with 5 (p0–2), 5 (m0–2), 4 (a1–2) smooth chaetae, p0–1 longer than others (as in Fig.5H View FIGURE 5 ). Dorsal head chaetotaxy as in Fig.8C View FIGURE 8 with 11 An, 4 A, 3 M, 8 S, 1 Ps, 1 Pi, 3 Pa, 3 Pm and 4 Pp mac, Ps5 as mes. Labial basolateral and basomedial fields with M1–2, R, E and L2 ciliated chaetae; a1–5 and l1 as smooth chaetae; R chaeta not reduced ( Fig.6D View FIGURE 6 ). Labial palp with 5 main papillae (A–E) with 0, 5, 0, 4, 4 guard chaetae, respectively; papilla E with lateral process (l.p.) finger-shaped, not reaching the papilla base; papilla H with 2 accessorial chaetae (as in Fig.6A View FIGURE 6 ); labial papillae with 5 smooth proximal chaetae. Maxillary outer lobe with 1 apical smooth appendage (a.a.) and 1 subapical blunt discretely ciliate chaeta (b.c.); sublobal plate with 3 chaeta-like appendages ( Fig.6H View FIGURE 6 ). Cephalic groove with several microchaetae and 5 +5 surrounding mac ( Fig.7C View FIGURE 7 ).

Trunk dorsal chaetotaxy. Th.II with 1 a (a5, excluding anterior collar), 2 central m and 9 central p main mac ( Fig.9E View FIGURE 9 ). Th.III with 13 central mac (with unclear homologies) plus a5 lateral mac ( Fig.9F View FIGURE 9 ). Abd.I with 6 mac, acc. p6 sensillum not seen, possibly absent ( Fig.10E View FIGURE 10 ). Abd.II with 6 central and 1 lateral mac ( Fig. 10F View FIGURE 10 ). Abd.III with 1 a (a1), 4 m and 1 p mac ( Fig. 11E View FIGURE 11 ). Abd.IV with 22–26 central and 8–11 lateral mac, all with unclear homologies ( Fig.11F View FIGURE 11 ). Abd.V with 4 a, 5 m, 12 p plus 4 mac with unclear homologies ( Fig.12C View FIGURE 12 ).

Legs. Trochanteral organ with 54–55 spine-like chaetae ( Fig.14C View FIGURE 14 ). Tibiotarsus III with one straight smooth chaeta near unguiculus, tenent hair smooth, longer than unguis, anterior and posterior pretarsal chaetae present ( Fig.14G View FIGURE 14 ). Ungues with 1 dorsal, 2 paired outer and 4 inner teeth, 2 proximal paired, 1 median and 1 distal; unguiculi lanceolate with outer lamella smooth ( Fig.14G View FIGURE 14 ).

Abdominal appendages. Ventral tube anterior face with 7+ 7 distal mac ( Fig.13G View FIGURE 13 ); posterior face lacking smooth distal chaetae, with several mic and mes of different sizes ( Fig.13H View FIGURE 13 ); lateral flaps with about 3 smooth and 12 ciliate chaetae ( Fig. 13I View FIGURE 13 ). Manubrial plate with 2 mac and 2 pseudopores. Manubrium and dens dorsally covered by several chaetae, ventrally scaled; dens lacking modified large distal chaeta. Mucro bidentate ( Fig. 14I View FIGURE 14 ).

Etymology. The new species honours the ancient Australian aboriginal people (Mamu) who inhabited the coastal rainforest region south of Cairns, where the species was collected.

Distribution and habitat. Collected in lowland mesophyll vine forest at Polly Creek, Garradunga near Innisfail in northeastern Queensland ( Fig.15 View FIGURE 15 ).

Remarks. See comparisons of Plumachaetas belae sp. nov. and Table1 View TABLE 1 .