Allopauropus fraterculus, Scheller, 2009

Scheller, Ulf, 2009, New species of Pauropoda (Myriapoda) from Tasmanian temperate rainforests, Memoirs of Museum Victoria 66 (2), pp. 289-329 : 290-292

Allopauropus fraterculus sp. nov.

( Figs. 1–11 )

Material Examined. Holotype. Ad. 9 (female), Bruny Island , Mount Mangana, Loc. 12 (43°22.1'S, 147°17.0'E), moss on dead log, 4–9. iv.1989 ( JD, PG).

Paratypes. Big Sassy Creek , Loc. 7, (42°08.5'S, 147°54.3'E), rainforest, rotten log, 6 ad. 9 (2 males, 4 females), 17.v.1989 ( JD) . Rivaux Creek , (41°15'S, 146°40'E), litter, 1 ad. 9 (female), 20.xii.1988 ( PG) .

Other material (185 specimens). Loc. 1, moss on Nothofagus , 1 subad. 8 (female), 1.iv.1989 ( JD) and moss on dead trunk, 1 ad. 9 (female), 31. iv. 1989 ( PG) . Loc. 2, moss on ground, 1 ad. 9 (female), 1 juv. 6, 21. iv.1989 ( HM, JD) . Loc. 4, litter, 1 ad. 9 (male), ( HM) and soil core, 1 subad. 8 (female), 1 juv. 5, 3–8.xi. 1989 ( RC) . and moss on log, 2 ad. 9 (female), 18.xi.1989 ( HM) . Loc. 6, moss on tree trunk, 1 ad. 9 (male), 1 subad. 8 (female), 3 juv. 6, 11.vi.1990 ( ATW) . Loc. 7, rotten log, 119 ad. 9 (27 male, 56 female, 36 sex?), 30 subad. 8 (2 female, 28 sex?), 10 juv. 6, 8 juv. 5, 17.v.1989 ( JD) . Loc. 12, moss on dead log, 1 ad. 9 (female), 4–9.iv.1989 G) and moss on log, 1 ad. 9 (female), 9. xi.1989 ( PG) . Loc. 13, litter, 2 ad. 9 (male, female), 27.ii.1989 ( SS) .

Diagnosis. The new species is very close to A. maoriorum Remy described from New Zealand ( Remy1956a), in natural habitats also known from New Caledonia and southern Chile, but can be distinguished in the following manner. The antennal globulus g has a thin stalk, only 4–5 bracts and longish capsule in fraterculus but has a thick stalk, several bracts, and spherical capsule in maoriorum ; the 4th antennal segment has the seta u (not mentioned by Remy in maoriorum ); the anal plate is an almost regular hexagon in fraterculus , but is 5-sided with posterior margin in a long curve in maoriorum .

Description. Length. -(0.55-) 0.69(-0.72) mm.

Head. -Tergal setae of medium lengths, sublateral and lateral ones fairly long, subcylindrical-cylindrical, annulate, blunt. Relative lengths of setae, 1st row: a 1 =10, a 2 =(10-)11(-12); 2nd row: a 1 =(8-)9(-11), a 2 =14(-16), a 3 =(9-)10(-12); 3rd row: a 1 =(9-)11, a 2 =(14-)16(-17); 4th row: a 1 =(12-)16, a 2 =(20-)21(-26), a 3 =(18-)21, a 4 =(18-)19(-20); lateral group setae: l 1 = l 2 =(17-)19(-21), l 3 =(32-) 40(-45). The ratio a 1 /a 1 -a 1 in 1st row 0.7(-0.8), 2nd row 0.6(-0.7), 3rd row (1.3-)1.5(-1.6) and 4th row 1.3(-1.5). Temporal organs small, their length in tergal view 0.6(-0.7) of their shortest distance apart, posterior aperture absent. Head cuticle almost glabrous.

Antennae. -Segment 4 with 5 subcylindrical annulate blunt setae; their relative lengths: p =100, p' =(58-)61(-66), p'' =(54-)56(-59), r =(22-)23, u =(3-)4. The p''' rudimentary. Tergal seta p (1.1-)1.2 times as long as tergal branch t. The latter somewhat clavate, (2.7-)3.0(-3.1) times as long as its greatest diameter and as long as (-1.1 times as long as) sternal branch s, that branch (2.2-)2.4 times as long as its greatest diameter; anterodistal corner of s distinctly truncate. Seta q as seta p of 4th segment, (as long as-) 1.2 times as long as s. Relative lengths of flagella (basal segments included) and basal segments: F 1 =100, bs 1 =8(-12); F 2 =42(-54), bs 2 =(6-)7(-9); F 3 =85(-100), bs 3 =10(-11). The F 1 (2.7-)3.1 times as long as t, F 2 and F 3 1.4(-1.5) and (2.7-)2.8(-2.9) times as long as s respectively. Distal calyces hemispherical; distal part of flagellar axes between last lamella and calyx strongly widened, ball-shaped. Globulus g (1.5-)1.8(-1.9) times as long as wide; (4-)5 bracts, capsule ovoid, distinctly longer than wide; width of g 0.5 of the greatest diameter of t. Antennae glabrous.

Trunk.- Setae of collum segment somewhat clavate, dense but distinctly annulate, blunt, furcate but with rudimentary glabrous pointed secondary branches; sublateral setae 3.0(-3.1) times as long as submedian ones; sternite process triangular, with anterior lengthening narrow and with apical incision; appendages barrel-shaped, caps with collar; process and basal segment of appendages with minute pubescence.

Setae on tergites subequal in length; on anterior tergites as on tergal side of head, on posterior tergites cylindrical and with oblique pubescence. There are 4+4 setae on tergite I, 6+6 on II–IV, 6+4 on V, 4+2 on VI. Submedian posterior setae on VI 0.5(-0.6) of their distance apart and (2.4-)2.5 times as long as pygidial setae a 1. Tergites almost glabrous.

Relative lengths of bothriotricha: T 1 =100, T 2 = (98-)101(-105), T 3 =102(-106), T 4 =(116-)128(-134), T 5 =(124-)135(-141). They have simple, straight axes, thin in all but T 3, the latter with thicker axes, in proximal half compact and in distal half annulate, each annulus with a whorl of erect hairs. Pubescence hairs on T 1, T 2, T 4 and T 5 oblique in proximal 1/3,more outwards erect.

Genital papillae (paratypes) glabrous, conical, with inner sides only a little curved, outer sides strongly convex, 1.4(-1.8) times as long as their greatest diameter; seta (0.3-)0.4 of the length of organ.

Legs. –Setae on coxa and trochanter of leg 9 similar, simple, subcylindrical, annulate, blunt, those more anteriorly with glabrous blunt, rudimentary secondary branches. Coxal seta on leg 2 in male as other coxal setae but somewhat clavate. Legs short, tarsus of leg 9 subcylindrical, 2.9(-3.4) times as long as its greatest diameter. Proximal seta thin and with oblique pubescence, its length (0.3-)0.4 times length of tarsus and (1.3-)1.5 times as long as distal seta; the latter somewhat clavate, annulate, blunt. Cuticle of tarsus almost glabrous.

Pygidium. Tergum.-Posterior margin between st straight (or somewhat convex). Relative lengths of setae: a 1 =10, a 2 =(25-)27(-30), a 3 =(56-)73, st =(2-)3. The a 1, a 2 and a 3 shortly pubescent, subcylindrical, tapering, pointed, curved inwards, a 1 also pointing inwards; st straight and clavate, with distinct pubescence, pointing inwards. Distance a 1 -a 1 (2.2-)2.7 times as long as a 1; distance a 1 -a 2 (3.5-)5.0 times as long as distance a 2 -a 3; distance st-st (6.4-)9.0 times as long as st and (as long as-)1.1 times as long as distance a

1

-a

1.

Cuticle minutely granular.

Sternum.-Posterior margin between b 1 with broad and low lobe below anal plate; hind area divided into two rounded parts by a posteromedian incision. Relative lengths of setae (a 1 =10): b 1 =(38-)50, b 2 =(14-)18, b 3 =(9-)12, all setae tapering, pointed and with very short oblique pubescence; b 1 about as long as their distance apart, sometimes with distal swelling; b

2

(0.8-)0.9 of the length of distance b

1

-b

2

, b

3

0.3 of their distance apart. Anal plate somewhat longer than broad, glabrous, hexagonal, with anterior and posterior margins subequal in length; two cylindrical, blunt appendages with short oblique pubescence protrude from posterosternal margin, 0.6(-0.7) of the length of plate, somewhat pointing outwards.

Subad. 8.-Setae d 1 on pygidial tergum 0.5 of their distance apart; setae d 2 0.7 of the length of d 1 and 0.8 of distance d 1 -d 2.

Etymology —From Latin frater, fratris = brother (of A. maoriorum ).

Distribution in Tasmania. Most specimens were collected from a rotten log at Big Sassy Creek but the species seems to be very widely distributed in the State.

Figures

Figs. 1–11. Allopauropus fraterculus sp.nov., holotype 1–6, 8–11; paratype 7: 1, head, median and right part, tergal view; 2, right antenna, sternal view; 3, collum segment, median and left part, sternal view; 4, tergite VI, posterior part; 5, T; 6, T; 7, right genital papilla and seta on coxa of 1 3 2nd pair of legs, anterior view; 8, seta on trochanter of 9th pair of legs; 9, tarsus of 9th pair of legs; 10, pygidium, posterior and left part, sternal view; 11, anal plate, lateral view. Scale line a for figures 5, 6, 8, 9; b for figures 1–3, 4, 7; c for figures 10, 11.