Hammenia macrostella, Zacharda, 1980

Andre, H. M., Zacharda, M. & N'Dri, J. K., 2010, From Parataxonomy To Molecular Data: The Case Of Rhagidiidae (Acari) From Belgian Soils, Acarologia 50 (4), pp. 501-512 : 504

Hammenia macrostella

( Figs 1C , 2B , 3B , 5 D-F, 6, 7C-D)

The rhagidial organ on tarsus I is composed of four parallel grooves, each receiving a recumbent solenidion. The stellate organ, e, is particularly developed, hence the name of the species. On tibia I, the recumbent solenidion and its groove are flanked paraxially by the dorsal seta which is eupathidial, d ( Fig. 4C ).

On tarsus II, the rhagidial organ comprises three grooves, each with a recumbent solenidion. Tibia II has a single groove with a recumbent solenidion ( Fig. 4F ).

Formulae:

Epimera: 3-1-4-3.

Legs:

I (21(2)-8(1)-7-(9-1)-1) with (ft), (tc), (it), (u), (p) as tarsal eupathidia,

II (15(2)-5(1)-5-8-1) with (tc), (it), (p) and proximal pairs of (v) as tarsal eupathidia

III (12-4-5-(4-2)-1 or 2) with tc ’, (it), (p) as tarsal eupathidia,

IV (11-4-4-(3-2)-1) with (tc) and (p) as tarsal eupathidia.

Figures

FIGURE 1: Dorsal aspect of different soil Rhagidiidae. A – Brevipalpia minima Zacharda, 1980; B – Coccorhagidia clavifrons (Canestrini, 1886); C – Hammenia macrostella Zacharda, 1980; D – Parallelorhagidia evansi (Strandtmann and Prasse, 1976); E – Crassocheles virgo Zacharda, 1980 (from Zacharda 1980).

FIGURE 2: Brevipalpia minima and Hammenia macrostella in ventral view. Scale bar = 50 µm.

FIGURE 3: Prodorsum of Brevipalpia minima and Hammenia macrostella. Scale bar = 25 µm.

FIGURE 5: Rhagidial organs I in dorsal (A, D) and lateral (B, E) views and rhagidial organs II in latero-dorsal view (C, F) of Brevipalpia minima (A-C) and Hammenia macrostella (D-F). Insert of famulus in C. Scale bar = 100 µm.

FIGURE 4: Brevipalpia minima Zacharda, 1980: A – dorsum, B – venter, C – trichobothrium, D – palp, E – tarsus I in lateral aspect, F – chelicera, G – subcapitulum, H – rhagidial organ I (from Zacharda 1980).