Plumachaetas mamuensis sp. nov. Oliveira, Bellini & Greenslade

Figs 3C; 5B,C,F,H; 6A,D,H; 7C; 8C; 9 E–F; 10E–F; 11E–F; 12C; 13G,H,I; 14C,G,I,J; 15; 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) . Paratypes deposited at Australian Museum of Sydney on slide NºAMS/ COLL 00000012: 1 female on slide, same data as holotype . Paratypes deposited at South Australian Museum (SAMA), Nº SAMA / COLL 00000010, 1 specimen in ethanol, same data as holotype .

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

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). 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). 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). Ant.III apical sense organ with 2 small sensory rods in cavity plus 3 surrounding guard sensilla (Fig.5C). Ant.I with 7 dorsal mac (Fig.5F). 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). Dorsal head chaetotaxy as in Fig.8C 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). 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); 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). Cephalic groove with several microchaetae and 5 +5 surrounding mac (Fig.7C).

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

Legs. Trochanteral organ with 54–55 spine-like chaetae (Fig.14C). Tibiotarsus III with one straight smooth chaeta near unguiculus, tenent hair smooth, longer than unguis, anterior and posterior pretarsal chaetae present (Fig.14G). 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).

Abdominal appendages. Ventral tube anterior face with 7+ 7 distal mac (Fig.13G); posterior face lacking smooth distal chaetae, with several mic and mes of different sizes (Fig.13H); lateral flaps with about 3 smooth and 12 ciliate chaetae (Fig. 13I). 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).

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).

Remarks. See comparisons of Plumachaetas belae sp. nov. and Table1.