Biogeographical and ecological insights from Australasian faunas: the megadiverse collembolan genus, Entomobrya (Entomobryidae)
Jordana, Rafael
Greenslade, Penelope
Zootaxa
2020
2020-05-06
4770
1
1
104
Jordana & Greenslade, 2020
Jordana & Greenslade
2020
[151,396,1521,1548]
Entognatha
Entomobryidae
Entomobrya
Animalia
Collembola
16
17
Arthropoda
species
additae
sp. nov.
( Figs 1A, 4A, 7A–H)
Holotype. Femaleon slide, 16–1, QLD, Lambs Head, 10 kmW of Edmonton, 2 ndtower, - 17.023°S, 145.641°E, 1320masl, pyrethrum spray, logs and trees, 11.xii.1989, G. Monteith, G. Thompson& H. Janetzkileg., [ QLDMus 16-1]. Paratypes. Five females. Same collection details as holotypebut on mossy rock, various dates 1988, 10.xii.1989, [QLDMus 16–1, 16–2, 15–1, 15–2, 22–2]. Other material examined. QLDMus, QLD, Mt Lewis Rd. 16 kmfrom Highway, - 16.571°S, 145.260°E, 900masl, Dec 1989to Jan. 1990, G. Monteith& G. Thompsonleg; QLD, Pauls Luck, Platypus Creek, 13 km W. Mossman, - 16.447°S, 145.257°E, 1135masl, moss, Jan. 1990and 17.x.1981, G. Monteith& Janetzkileg; QLD, 4 kmS. of Koombooloomba Dam, - 17.864°S, 145.867°E, 800masl, rain forest, pitfalls, Dec 1989to Jan 1990, G. Monteith, G. Thompson& H. Janetzkileg; QLD, O’Reilly’s, Dec 1988, - 30.497°S, 153.138°E, 935maslPG leg.; SAMA, NSW, Styx River, Nothofagusforest, canopy fogging, various dates in 1990, 1991, - 30.497°S, 152.396°E, 1390masl; 3 specimenswith truncate unguiculus, specimens 2, 3 and 4, QLD, LamingtonNP, Oct. 2006, - 30.497°S, 153.138°E, 935 masl, pitfall, Kitchingleg.[QLDMus 15–1, QLDMus 15–2, QLDMus 17, QLDMus 22–2].
Description.Size. Length 2.141 mm(n=7) FIGURE 7. Entomobrya additae sp. nov.Line drawings A–H. A, leg 1 (bar=0.05 mm); B, leg 3 (bar=0.05 mm);; C, tip of dens and mucro (bar=0.014 mm); D, head chaetotaxy (bar 0.38 mm); E, Th II chaetotaxy; F, Abd II chaetotaxy; G, Abd III chaetotaxy; H, Abd IV chaetotaxy. Bar E–H=0.125 mm. Colour. Dorsally whitish yellowish with some dark blue bands in anterior and lateral parts of Th II (sometimes with a posterior band), Lateral bands on Th III, Abd I and Abd II, Abd III with lateral longitudinal stripes and a posterior band with or without a posterior triangular central spot, Abd IV with lateral, transverse irregular bands and a narrow stripe on posterior edge. Abd V and VI with lateral spots ( Figs 1A, 4A). Body some specimens very similar in colour to E. varia. Head. The apical bulb of antennal segment IV bilobed. The labral papillae spinulate with one or two spines. Prelabral and labral chaetae 4/554. Prelabral chaetae clearly ciliated, labral chaetae smooth. Labial chaetae with MREL 1L 2Ciliated chaetae, R smaller than M. External labial process of papilla E reaching at the papilla end. Eyes G and H small and subequal. Ant / head=2.55 (n=7). Ratio Ant I:II:III:IV=1:2.3:2.0:2.43. Thorax and abdomen. Trochanteral organ with 17–20 smooth and spiniform chaetae. Unguis ( Figs 7A–B) with 4 inner teeth; paired teeth located approximately 29% (n=12) of inner unguis length, dorsal tooth basal. Two clear unpaired teeth on the internal edge of the unguis, first one at 66% on unguis 1 and 2, 75% of the basis of unguis 3, unguiculus long in leg 3 and shorter in leg 1, on both legs truncate and with a smooth external edge. Tenent hair expanded distally and longer than the unguis. Manubrial plate with 4 chaetae and 2 pseudopores. Mucro normal. Notringed part of dens 2 times the mucro. Chaetotaxy. Dorsal head chaetotaxy at figure 7D; Mc An’ 0, A 6, A 7, S’ 0, S 1, always absent, S 0, S 2, S 4i, S 4and S 5present (S 4ipresent or absent); M 2and M 4present; Ps 2absent, Ps 5always present. Thoracic chaetotaxy with one Mc (m 1) on T1 area on Th II, T2 area with Mc a 5and m 4( Fig. 7E). Abdominal chaetotaxy reduced.Abd II with a 2present only in three specimens from 11, Mc a 3absent, m 3and m 3eMc present Abd III with m 3( Fig. 7G). Abd IV with 12 central and posterior Mc A 3, A 5–A 6, B 5–B 6and E 1( Fig. 7H). Mucro with 16 µ(n=7) as Figure 7C. The chaetotaxy formula: 3,1,0,2(1),1a/1,2/0(1),2/0,0,1/0,2,0,2,2. Trichobothria on Abd IV at T2 and T6 location (0101). Measurements: Ant I–IV 117, 264, 233, and 272 µmrespectively. Abd IV/III=4 (n=7).
Remarks.A number of specimens incorrectly labelled as Entomobrya variafrom different localities were similar in chaetotaxy and were found to be this new species. The new species is common in high altitude locations in northeast Queenslandwith some material from Nothofagusrainforest at Styx River in northern NSW. Its colour is similar to that of TypeII E. varia Schött, 1917but it has a truncate unguiculus on all legs, which separates it from Entomobrya varia. It is also similar to E. peregrina sp. nov.in that they both have a simplified chaetotaxic formula in some respects. The following Table separates the three species by 12 characters as well as by the colour difference. Leg Head Abd II Abd IV Species/ character Unguiculus Pair unguis teeth S4 LP a2 a3 m3e m3ea A3 A4 B3 E1 E. additae Tru, sm 29% (n=12) 1 (0) 50% mult 0=70% 0 0 1 1 0 0 1 sp. nov. each (1)=30% E. peregrina Acu, se 29% (n=7) 1 tria 1 0 1 0 1 0 1 0 sp. nov. E. varia Acu, sm 40% (n=23) 1 mult 1 1 1 0 0 1 0 1 1=presence; 0= absence; Acu = acuminate; LP=labral papilla; mult = multispinate, tria = triangular; se = serrate; sm = smooth; Tru = truncate; A= E. additae; P= E. peregrina, V= E. varia. Differences A/P=8; A/V=8 Characters; P/V=9 Characters Very few Entomobryahave the truncate unguiculus, a character that is usually associated with halophilic habits. Etymology.The species name signifies yet another new species in the genus.
2610568314
1989-12-11
QLD
G. Monteith & G. Thompson & H. Janetzki
1320
-17.023
Female
76
145.641
Lambs Head
16
17
1
holotype
2610568459
1989-12
1990-01
1989-12
QLD
G. Monteith & G. Thompson
900
-16.571
Mt Lewis Rd.
76
145.26
Highway
16
17
1
2610568392
Jan. 1990 and 17. x. 1981
QLD
W. Mossman & G. Monteith & Janetzki
1135
-16.447
Pauls Luck
76
145.257
Platypus Creek
16
17
1
2610568336
1989-12
1990-01
1989-12
QLD
G. Monteith & G. Thompson & H. Janetzki
800
-17.864
Koombooloomba Dam
76
145.867
16
17
1
2610568508
[535,1330,1952,1979]
1988-12
QLD
935
-30.497
O'Reilly's
72
153.138
16
17
1
2610568541
SAMA, NSW
1390
17
18
-30.497
Styx River
72
152.396
16
17
3
2610568467
2006-10
QLD
Kitching
935
-30.497
Lamington
72
153.138
17
18
1