Mojingapauropus biappendiculatus, Scheller, Ulf, 2014

Scheller, Ulf, 2014, New records of Pauropoda (Myriapoda) with descriptions of new taxa, Zootaxa 3866 (3), pp. 301-332 : 323-325

Mojingapauropus biappendiculatus n. sp.

Figs 47 –60

Type specimens. Holotype: ad. 9(♀), Panama, near Ft. Sherman, Mojinga Swamp. in leaf litter, August 10, 1979, R.J. Snider leg. Paratype: ad. 9(♀), same data as holotype. Type specimens deposited in the Zoological Museum, University of Lund, Sweden.

Derivation of name. From the Latin bis = two and appendix = appendage, referring to the appendages of the posterior part of last tergite.

Description. Length. (0.65) 0.84 mm.

Head ( Figs 47–49 ). Posterior part covered by tergite I, only most anterior and lateral margins visible from above. Setae of three types: 1, anteriomedian one cylindrical, blunt, striate; 2, submedian and anteromarginal ones lanceolate-irregular; 3, a few lateral ones cylindrical, pointed, with short pubescence or glabrous. Cuticle of head coarse. Only small parts of temporal organs visible from above ( Fig. 47 ), organs broadest anteriorly ( Figs 48-49 ), tergal margin even, anterior and lower margins with irregularities, broad lobe in the direction of the mouth, only posterior and lower margins partly and narrowly uplifted.

Antennae ( Fig. 50 ). Segment 4 longish, five thin, cylindrical, annulated setae, their relativ lengths: p = 100, p ' = (80) 81, p '' = 49 (69), r = 49 (41), u = 6 (9). Tergal seta p 0.7 (0.8) of the length of tergal branch t. The latter branch almost cylindrical, 3.0 (3.3) times as long as the greatest diameter, (1.1)1.2 times as long as sternal branch s, that branch (2.1) 2.3 times as long as the greatest diameter, anterodistal corner distinctly truncate. Seta q as seta r of segment four, short, (0.4) 0.5 of the length of s. Relative lengths of flagella (with base segments included) and base segments: F 1 = 100, bs 1 = (7) 8, F 2 = (40) 42, bs 2 = 5 (6), F 3 = (88) 94, bs 3 = 4 (5). F 1 2.8 (3.3) times as long as t, F 2 and F 3 1.4 (1.5) and 3.1 (3.3) times as long as s respectively. Distal calyces of F 1 and F 2 more pointed than those of F 3, distal parts of flagella axes widened only just below calyces. Globulus g subspherical with distinct, thin stalk, 2.9 times as long as its greatest diameter; ≈11 bracts; capsule flattened. Diameter of g almost equal to the greatest diameter of t. Antennae glabrous

Trunk ( Figs 47, 51, 52 –55). Setae of collum segment ( Fig. 51 ) furcate, primary branch cylindrical, blunt, annulated, secondary branch rudimentary, pointed, glabrous, sublateral and submedian setae of the same length. Sternite process with deep anterior, narrowly U-shaped incision; appendages ovoid with short pubescence, caps distinct, glabrous.

Tergites ( Figs 47 , 53–55). All entire, strongly sclerotized, 3rd (Fig. 53) and 4th ones broadest. Setae in irregular rows, scutellate, inner ones largest. Total number of setae on tergites (holotype only): I ( Fig. 47 ) with 14, II with 36. III (Fig. 53) with 60, IV with 64, V with 46, VI (Fig. 54) with 18. All tergites except I with two longitudinal rows of clear spots (Fig. 53): II with 5 ones in each row, III-V with 7, VI with 2. Cuticle of tergites coarse, distinctly grainy.

Bothriotricha (Fig. 57). Relative lengths (holotype only): T 1 = 100, T 2 = 75 and 76, T 3 = 34 and 36, T 4 = 70 and 75, T 5 = 75. Axes simple, proximal halves glabrous, distal halves very thin except in T 3, with thin and dense erect pubescence. T 3 (Fig. 57) clavate distally, almost glabrous, thickest, most distinct in proximal ¾.

Legs (Figs 58-60). All legs 5-segmented. Seta on coxa of leg 9 (Fig. 58) simple, cylindrical, blunt, annulated, seta on trochanter (Fig. 59) furcate, branches as on coxal seta but secondary branch thin and short, not half of the length of main branch. More anteriorly these setae as seta on trochanter of leg 9 but with rudimentary secondary branch. Tarsus of leg 9 (Fig. 60) short, tapering, (2.1)2.3 times as long as greatest diameter. Setae curved, proximal one thin, tapering, pointed, with sparse oblique pubescence on distal half; distal seta cylindrical, blunt, annulated; proximal seta not fully 0.4 of the length of tarsus and as long as distal seta. Cuticle glabrous.

Pygidium ( Figs 52 , 54–56). Much narrower than tergite VI ( Figs 52 , 54). Tergum (Fig. 55). Hind margin straight with very small V-shaped incision between st. Relative lengths of setae: a 1 = 10, a 2 = 10(11), a 3 = 20, st = 2; a 1 scutellate, pointed, in tergal view ovoid, point directed downwards, a 2 lanceolate with very short pubescence, a 3 long, tapering, pointed, glabrous, curved inwards, st small, clavate, shortly pubescent, all directed posteriorly: distance a 1 -a 1 1.3 times as long as a 1 and 0.8 of distance a 1 -a 2, that distance 3 times longer than distance a 2- a 3; distance st-st 10 times longer than st and (1.4) 1.7 times as long as distance a 1 -a 1. Cuticle glabrous.

Sternum ( Figs 52 , 56). Posterior margin with deep, broadly V-shaped indentation between setae b 1 and a large median posteriorly directed lobe with posteromedian incision below anal plate. Setae b 1 projecting backwards from posterior part of large triangular lobes. Relative lengths of setae (pygidial a 1 = 10): b 1 = 33 (35); b3 = 7. These setae cylindrical, b 1 tapering, glabrous, b 3 thin, cylindrical, with short oblique pubescence. b 1 as long as (1.2 times as long as) interdistance, b 3 0.3 of interdistance.

Anal plate (Fig. 56) very like some occurring in the Eurypauropodidae genera Trachypauropus , Acopauropus and Samarangopus . Narrowest at base, then widening into four posteriorly directed appendages, two shorter, tapering lateral ones reaching to half of the length of the plate, and two, cylindrical, straight, submedian ones cut obliquely at ends and each provided with a bladder-shaped appendage with very short pubescence, length of appendages 0.3 of the length of the plate.

FIGURES 53–60. Mojingapauropus biappendiculatus n. sp., holotype, ad. 9 (♀). 53. Tergite III, median and right part, surface structures only partly drawn. 54. Last tergite, right half, and pygidium, tergal view, surface structures only partly drawn. 55. Pygidium, median and right half, tergal view. 56. Pygidium, sternal view. 57. T 3. 58. Seta on coxa of leg 9. 59. Seta on trochanter of leg 9. 60. Tarsus of leg 9. Scale a: 53, 54; b: 55–57; c: 58–60.

Figures

FIGURES 47 – 52. Mojingapauropus biappendiculatus n. sp., holotype, ad. 9 (♀). 47. Right anterior parts of head and tergite I, surface structures partly not drawn. 48. Left temporal organ, sternal view. 49. Left temporal organ, anterolateral view. 50. Left antenna, sternal view. 51. Collum segment, median and left part, sternal view. 52. Last tergite and pygidium, sternal view. Scale a: 47, 52; b: 48, 49; c: 50, 51.