Plumachaetas loriensis, 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: 128-129

publication ID

https://doi.org/10.11646/zootaxa.4706.1.5

publication LSID

lsid:zoobank.org:pub:B5C7776D-DC1C-43BE-AEAE-3983F88A426D

persistent identifier

http://treatment.plazi.org/id/0A6887FB-0E46-FFE1-5CBE-F8E379AAFE8E

treatment provided by

Plazi

scientific name

Plumachaetas loriensis
status

sp.nov.

Plumachaetas loriensis   sp.nov. Oliveira, Bellini & Greenslade

Figs 3B View FIGURE 3 ; 5B, C, E, H View FIGURE 5 ; 6A, C, G View FIGURE 6 ; 7B View FIGURE 7 ; 8B View FIGURE 8 ; 9 View FIGURE 9 C–D; 10C–D; 11C–D; 12B; 13D–F; 14B, F, I, J; 15; Table1

Type material. Holotype female, deposited at Australian Museum of Sydney on slide Nº AMS/ COLL 00000007: Australia, New South Wales, Taree, Lorien Wildlife Refuge , 31° 45’04”S, 152°32’03” E, Malaise Trap, Forest, Dec 31/2011 ̅– Feb 4/2012, G. & B. Williams coll. GoogleMaps   Paratypes deposited at Australian Museum of Sydney on slides Nº AMS/ COLL 00000008–000000010: 2 males and 1 female on slides, same data as holotype GoogleMaps   . Paratypes deposited at South Australian Museum ( SAMA), Nº SAMA / COLL 00000007–00000009: 1 male, 2 females on slides, same data as holotype GoogleMaps   .

Diagnosis. Tibiotarsi distal region dark blue ( Fig.3B View FIGURE 3 ). Ant.IV apical region lacking thick chaeta ( Fig.5B View FIGURE 5 ). Ant.I with 8-9 dorsal mac ( Fig.5E View FIGURE 5 ). Labral chaetae p0–1 longer than others (as in Fig. 5H View FIGURE 5 ). Dorsal head chaetotaxy with 5 M and at least 2 Pi mac ( Fig.8B View FIGURE 8 ). Labial basolateral and basomedian fields with chaetae M1 and L2 ciliated, others smooth ( Fig.6C View FIGURE 6 ). Th.II central region with 8–9 m and 20–22 p mac ( Fig.9C View FIGURE 9 ). Th.III central region with 27–29 mac ( Fig.9D View FIGURE 9 ). Abd.I with 13–14 mac ( Fig.10C View FIGURE 10 ). Abd.II with 8–9 central and 1–2 lateral mac ( Fig.10D View FIGURE 10 ). Abd.III with 2 central and 4 lateral mac ( Fig.11C View FIGURE 11 ). Abd.IV with 26–28 central and 26 lateral mac ( Fig.11D View FIGURE 11 ). Trochanteral organ with 75–77 spine-like chaetae ( Fig. 14B View FIGURE 14 ). Ventral tube anterior region with 7 +7 distal mac ( Fig.13D View FIGURE 13 ). Dens lacking modified large distal chaeta, mucro with 2 teeth ( Fig. 14I View FIGURE 14 ).

Description. Body pale yellow to brownish on ethanol; antennae and tibiotarsi light bluish with dark blue pigment on distal Ant.I–III, antero-dorsal and lateral head, lateral Th.II–Abd.V, distal tibiotarsi and distal femora. Eyepatches dark ( Fig.3B View FIGURE 3 ). Apically pointed strongly ciliate elongate scales covering Ant.I–II, dorsal and lateral head, dorsal trunk, legs, ventral manubrium and dens; ventral tube devoid of scales. Body (head+ trunk) length of holotype 2796 μm (trunk: 2125μm; head: 671 μm).

Head. Antennae longer than body length ( Fig. 3B View FIGURE 3 ). Holotype antennae lengths: 4269 μm (Ant.I =655 μm; Ant.II=1013 μm, Ant.III =712 μm, IV=1889 μm). Ant.IV not annulated and 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 9 dorsal mac ( Fig.5E 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.8B View FIGURE 8 with 11 An, 4 A, 5 M, 9 S, 2 Ps, 2 Pi, 3 Pa, 3 Pm and 4 Pp mac, three extra mac near Pi series also present. Labial basolateral and basomedial fields with M1 and L2 as ciliate chaetae; r, e, l1 and a1–5 as smooth chaetae; M2 absent; r chaeta   not reduced ( Fig.6C 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 ( 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.6G View FIGURE 6 ). Cephalic groove with several microchaetae and 10+ 10 surrounding mac ( Fig.7B View FIGURE 7 ).

Trunk dorsal chaetotaxy. Th.II with 1 a (a5, excluding anterior collar), 8–9 central m (m 2i present or absent) and 20–22 central p main mac ( Fig.9C View FIGURE 9 ). Th. III with 27–29 central mac (most with unclear homologies) plus a5–6 lateral mac ( Fig.9D View FIGURE 9 ). Abd.I with 13–14 mac, acc.p6 sensillum present ( Fig.10C View FIGURE 10 ). Abd.II with 8–9 central and 1–2 lateral mac ( Fig.10D View FIGURE 10 ). Abd III with 1 a (a1), 4 m and 1 p mac ( Fig.11C View FIGURE 11 ). Abd.IV with 26–28 central and 26 lateral mac, all with unclear homologies ( Fig.11D View FIGURE 11 ). Abd.V with 3 a, 5 m, 13 p plus 8 mac with unclear homologies ( Fig.12B View FIGURE 12 ).

Legs. Trochanteral organ with 75–77 spine-like chaetae ( Fig.14B 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.14F 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 serrated ( Fig.14F View FIGURE 14 ).

Abdominal appendages. Ventral tube anterior face with 7+7 distal mac ( Fig.13D View FIGURE 13 ); posterior face lacking smooth distal chaetae, with several mic and mes of different sizes ( Fig.13E View FIGURE 13 ); lateral flaps with about 11 smooth and 15 ciliate chaetae ( Fig.13F 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 ( Fig. 14I View FIGURE 14 ). Mucro bidentate ( Fig. 14I View FIGURE 14 ).

Etymology. The new species was named after its type locality, the Lorien Wildlife Conservation Area, maintained by G. and T. Williams (see comments above under P.belae   sp. nov.).

Distribution and habitat. Same locality and collection details as P.belae   sp. nov. (see above) ( Fig.15 View FIGURE 15 ).

Remarks. Plumachaetas loriensis   sp. nov. resembles P.halmaherae ( Yoshii & Suhardjono, 1992)   and P.sunae Zhang & Deharveng, 2015   (in: Zhang & Deharveng, 2015b) in its high number of central mac on Th.II–III. The new species differs from the other two in: dorsal head with 5 M mac and with at least 2 Pi chaetae (absent in the other two species); Th.II central region with 8–9 central m and 20–22 central p mac; Th.III with 27–29 central mac; Abd.I with13–14 mac; Abd.II with 8–9 central and 1–2 lateral mac; Abd.III with a1 mac; absence of thick chaeta on Ant.IV (present in P.sunae   , unclear in P.halmaherae   ); p0 labral chaeta enlarged (as in P.sunae   , normal in P.halmaherae   ); labial chaetae M1 and L2 ciliated (all smooth in P.halmaherae   , M1–2, R, E, L 1–2 in P.sunae   ); lanceolate unguiculus (truncate in P.halmaherae   and weakly truncate in P.sunae   ); trochanteral organ with about 75 spine-like chaetae; ventral tube anterior distal mac 7 +7; distal dens lacking modified enlarged chaetae (1 in P.sunae   ); and mucro with 2 teeth (see also Table 1).

SAMA

South Australia Museum