Plumachaetas wanangensis, 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 : 135-140

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.5623759
persistent identifier	https://treatment.plazi.org/id/0A6887FB-0E4F-FFFB-5CBE-F8B87FEFFAC2
treatment provided by	Plazi
scientific name	Plumachaetas wanangensis
status	sp. nov.

Treatment

Plumachaetas wanangensis sp.nov. Oliveira, Bellini & Greenslade

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

Type material. Holotype female, deposited at Australian Museum of Sydney on slide NºAMS/ COLL 00000013 : Papua New Guinea, Madang Province, Wanang Conservation Area , 5° 13.517’S; 145°4.880’E, Malaise Trap, 18– 22.XI. 2015, N. von Ellenrieder & R. W. Garrison coll, Forest Edge by oxbow pond, 80 m. GoogleMaps Paratype deposited at Australian Museum of Sydney on slide NºAMS/ COLL 00000014 : 1 female on slide, same data as holotype GoogleMaps .

Diagnosis. Tibiotarsi distal region dark blue ( Fig.3D View FIGURE 3 ). Ant.IV apical region with one thick chaeta ( Fig.5A View FIGURE 5 ). Ant.I with 8–10 dorsal mac ( Fig.5G View FIGURE 5 ). Labral chaetae p1 longer than others, p0 normal ( Fig. 5I View FIGURE 5 ). Dorsal head chaetotaxy with 2 M and 1 Pi mac, Ps mac absent ( Fig.8D View FIGURE 8 ). Labial basolateral and basomedian fields with only L2 ciliated, others smooth ( Fig.6E View FIGURE 6 ). Th.II central region with 5 m and 9 p mac ( Fig.9G View FIGURE 9 ). Th.III central region with 13 mac ( Fig.9H View FIGURE 9 ). Abd.I with 6–7 mac ( Fig.10G View FIGURE 10 ). Abd.II with 6 central and 1 lateral mac ( Fig.10H View FIGURE 10 ). Abd.III with 2 central and 4 lateral mac ( Fig.11G View FIGURE 11 ). Abd.IV with 18 central and 11 lateral mac ( Fig.11H View FIGURE 11 ). Trochanteral organ with about 40 spine-like chaetae ( Fig.14D View FIGURE 14 ). Ventral tube anterior region with 5+ 5 distal mac ( Fig. 13J View FIGURE 13 ). Dens lacking modified large distal chaeta, mucro with 4 teeth ( Fig.14J View FIGURE 14 ).

Description. Body pale yellow to brownish on ethanol; Ant.I–II light blue with dark blue pigment on proximal and distal regions of both segments, whole Ant. III–IV, lateral and posterior head, lateral Th.II–Abd.II, central lateral and posterior Abd.III, four central lateral spots and lateral posterior margins of Abd.IV, distal tibiotarsi and distal femora. Eyepatches dark ( Fig.3D 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 1922 μm (trunk: 1492μm; head: 430μm).

Head. Antennae longer than body length ( Fig.3D View FIGURE 3 ). Holotype antennae lengths: 2440μm (Ant.I= 402 μm; Ant.II= 596 μm, Ant.III= 534μm, IV= 908μm). Ant.IV not annulated with at least three types of chaetae: blunt sensilla and normal ciliate chaetae of different sizes and one thick apical chaeta ( Fig.5D 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 8 dorsal mac ( Fig. 5G View FIGURE 5 ). Prelabral chaetae (4) ciliate, labral chaetotaxy formula with 5 (p0–2), 5 (m0–2), 4 (a1–2) smooth chaetae, p1 longer than others, p0 normal ( Fig. 5I View FIGURE 5 ). Dorsal head chaetotaxy as in Fig.8D View FIGURE 8 with 10 An, 2–3 A, 2 M, 7 –8 S, 1 Pi, 4 Pa, 3 Pm and 4 Pp mac, Ps2 as mic, Ps5 as mes. Labial basolateral and basomedial fields with L2 ciliated chaeta; m2, r, e, l1, a1–5 as smooth chaetae; r chaeta not reduced ( Fig.6E 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. 6I View FIGURE 6 ). Cephalic groove with several microchaetae and 3 +3 surrounding anterior mac ( Fig.7D View FIGURE 7 ).

Trunk dorsal chaetotaxy. Th.II with 1 a (a5, excluding anterior collar), 5 central m and 9 central p main mac ( Fig.9G View FIGURE 9 ). Th.III with 13 central mac (with unclear homologies) plus a6 lateral mac ( Fig.9H View FIGURE 9 ). Abd.I with 6–7 mac, acc.p6 sensillum not seen, possibly absent ( Fig.10G View FIGURE 10 ). Abd.II with 6 central and 1 lateral mac ( Fig. 10H View FIGURE 10 ). Abd III with 1 a (a1), 4 m and 1 p mac ( Fig.11G View FIGURE 11 ). Abd.IV with 18 central and 11 lateral mac, all with unclear homologies ( Fig.11H View FIGURE 11 ). Abd.V with 3 a, 5 m, 10 p plus 3 mac with unclear homologies ( Fig.12D View FIGURE 12 ).

Legs. Trochanteral organ with about 40 spine-like chaetae ( Fig.14D 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.14H 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.14H View FIGURE 14 ).

Abdominal appendages. Ventral tube anterior face distal region with 5+5 mac plus 1 +1 mes ( Fig.13J View FIGURE 13 ); posterior face lacking smooth distal chaetae, with several mic and mes of different sizes ( Fig.13K View FIGURE 13 ); lateral flaps with about 11 smooth and 4 ciliate chaetae ( Fig.13L 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 with 4 teeth ( Fig.14J View FIGURE 14 ).

Etymology. The new species name honours the community living and caring for the Wanang Conservation Area, the type locality.

Distribution and habitat. An arboreal species found on one site in lowland tropical rainforest in Wanang Conservation Area near the north coast of Papua New Guinea ( Fig.15 View FIGURE 15 ).

Remarks. The new species most resembles P.dahlii ( Schäffer, 1898) sensu Yoshii & Suhardjono (1992) , P.halmaherae ( Yoshii & Suhardjono, 1992) and P.seramica ( Yoshii & Suhardjono, 1992) in labral p row with only p1 enlarged, a reduced number of Th.II central p chaetae, dens lacking enlarged distal chaetae and four mucronal teeth. Plumachaetas wanangensis sp.nov. differs from other congeners in the combination of: dorsal head with 2 M chaetae (M2, 4); Th. II with 9 p mac; Th.III with 13 central mac; Abd.I with 6–7 mac; Abd.II with 6 central mac; Abd.III with a1 chaeta; only L2 labial chaeta ciliate (R and L 2 in P.dahlii , all smooth in P.halmaherae and P.seramica ); unguiculus lanceolate (weakly truncate in P.seramica , truncate in P.halmaherae ); trochanteral organ with about 40 spine-like chaetae and ventral tube anterior distal mac 5 +5 (see also Table1 View TABLE 1 ).