Neofedrizzia imparmentum Seeman

Seeman, Owen D., 2007, Revision of the Fedrizziidae (Acari: Mesostigmata: Fedrizzioidea), Zootaxa 1480, pp. 1-55: 40-42

publication ID 10.5281/zenodo.176844

publication LSID

persistent identifier

treatment provided by


scientific name

Neofedrizzia imparmentum Seeman

sp. nov.

Neofedrizzia imparmentum Seeman   sp. nov.

( Figs 44 – 45 View FIGURES 44 – 45 )

Type specimens. Holotype, F, AUSTRALIA: Queensland: Atherton Tableland, Curtain Fig, 6.iv. 1995, D. E. Walter ( S 74166 View Materials ). Paratypes, Atherton Tableland: F, 2 M, same data as holotype ( S 74167 View Materials - 69); F, 3 M, Gadgarra, 7.iv. 1995, D. E. Walter ( S 74170 View Materials - 73); F, Road to Mt Bartle-Frere, 28.i. 1996, O. Seeman ( S 74174 View Materials ). All from passalid M. australasicus   and deposited in QM. M, F, same data as holotype, deposited in ANIC.

Diagnosis. Both sexes: idiosoma   755–770 long; anterior hyaline projection does not extend past CxI; exopodal patterning between CxII –III striped; pedofossae III present, IV absent; seta h 1 with 6–8 barbs; distal spine-like process on palp femur minute or absent; one non-filamentous excrescence ribbon-like, the other a short serrated blade. Female: sternal shield reticulated; seta st 1 10–11, much shorter than base of tritosternum; setae st 2-4 4–7 long; sternogynial shield smooth, anterior margin straight; femur III and IV with large lamellae. Male: tetartosternum absent, presternal processes articulated with sternoventral shield, asymmetrical, the left process pointed inwards and shorter than the right, tips separate from each other; sternoventral shield (anterior of genital opening) reticulated; seta st 1 18–20 long; genital opening placed between CxII –III, flanked by 9–10 pores.

Description. Female: Idiosoma   755–770 long, 545–560 wide, anterior hyaline projection with 1 pair of barbed setae 44–45 long. Marginal setae 7–8 long. Tritosternum base 42–44 long, 27–32 wide. Tetartosternum and sternal shield reticulate, tetartosternum relatively large, crown-shaped; st 1 10–11 long, st 2-4 4–7 long. Sternogynial shield 100–103 long, 103–109 wide, smooth, with 3–4 pores flanking shield. Ventral shield smooth-finely reticulate medially and in intercoxal region, lineate-reticulate laterally; 1 pair large semi-circular pores posteromedially of Cx IV, 1 pair of eye-like pores, ca. 5 pairs of small round pores, and 8 pairs of small (<5 long setae). Ventrianal shield 135–140 long, 345–365 wide, with lineate reticulation, paranal setae 41–44 long, other setae small (ca. 5) long; anterolateral corner of ventrianal shield not fused with ventral shield. Marginal shields with lineate reticulation. Pedofossae III and CxIV-marginal suture present.

Legs. TrI with seta pv 1 slightly thicker than seta av 1. FeI with seta pv 3 longer and thicker than setae pv 1 and pv 2. FeII with ventral lamella, seta ad 1 barbed and thickened. GeII with seta ad 3 spine-like, pd 3 short, slightly thickened. FeIII with lamella, expanded distal to av 1, seta pv 1 spine-like. GeIII with seta pd 2 spinelike. FeIV with lamella, expanded distal to av 1, seta pv 1 thick, spine-like, seta ad 2 setiform, seta pd 2 in line with seta ad 2. TaII –IV with seta av 2 spine-like, shorter than seta av 3. Legs II –IV with setiform ad and pd setae.

Gnathosoma   . Seta h 1 curved, with 6–8 barbs, 56–60 long, distance between h 1 –h 1 10; h 2 with 2–3 barbs, 35–36 long; h 3 6–8 long, posterolaterad h 2; palpcoxal seta 11–14 long. Corniculi not on tubercles. Palp, seta av 1 on trochanter with 13–15 barbs, 42 long; av 2 with 5 small barbs, 41–44 long. Chelicera, fixed digit 145– 150 long, movable digit 42–44 long; fixed digit with 2 large and 1 minute subapical tooth; excrescences consist of a large brush-like process, a small serrated blade, and a ribbon-like process with a crenate and serrated margin that extends well beyond the end of chelicerae.

Male: Idiosoma   745–780 long, 530–550 wide. Tritosternum base broad, 50–58 long, 54–60 wide, lateral margins with tiny serrations. Presternal processes asymmetrical, left process pointed and smaller than the right, truncate process; both processes broadly connected to sternal shield and pointing inwards. Anterior of male genital opening reticulate. Seta st 1 smooth, 18–20 long. Genital opening 49–51 long, 52–54 wide, with 9–10 large pores laterad the opening. Large lamellae on Cx I. Seta h 1 with 4 barbs, 56–59 long; h 3 posterolaterad h 1 but anterior h 2. Palpcoxal seta 20–22 long.

Remarks. This species occurs in northern Queensland on M. australasicus   .

Etymology. The specific name is Latin for “uneven chin” and alludes to the asymmetrical presternal processes of the male.


Australian National Insect Collection