Paredrodesmus monticolus, Mesibov, Robert, 2003

Mesibov, Robert, 2003, Two new and unusual genera of millipedes (Diplopoda: Polydesmida) from Tasmania, Australia, Zootaxa 368, pp. 1-32: 16-17

publication ID 10.5281/zenodo.157087

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scientific name

Paredrodesmus monticolus

n. sp.

Paredrodesmus monticolus   n. sp.

Figs. 6 View FIGURE 6 , 10 View FIGURE 10 , 11 View FIGURE 11 , map Fig. 12 View FIGURE 12 D

Holotype: Male, Butlers Gorge, DP 401203 View Materials (42 ° 16 ’01”S, 146 ° 16 ’ 25 ”E), 720m, 18.ii. 1994, R. Mesibov, QVM 23 View Materials : 25484. GoogleMaps  

Paratypes: 3 males, details as for holotype, AM KS 86292   ; 2 males, details as for holotype, QVM 23 View Materials   : 41154; 4 males, Little Florentine River , DN 525683 View Materials (42 ° 44 ’ 10 ”S, 146 ° 25 ’ 10 ”E), 440m, 13.iii. 1986, R. Bashford, QVM 23 View Materials GoogleMaps   : 41148, pitfall, one specimen in fragments.

Other material examined: 23 males. See Appendix for details.

Diagnosis: Distinguished from other Paredrodesmus   by the unique form of the gonopod.

Description: As for the genus. Males 10–12 mm long, 0.9–1.0 mm in maximum vertical diameter. In alcohol, well­coloured adults are pale with reddish mottling on distal anntennomeres and metazonites, notably around ozopores. Antennal bases separated by ca. 1.25 times a base diameter, antennomere 6 about one and a quarter times the width of 5. Legpairs 6 and 7 with a wide gap between coxae, legpair 5 with a narrower gap, legpair 4 with a small gap; flexed gonopods reach nearly to legpair 4. Genital opening on leg 2 coxa on a prominent mesal projection ( Fig. 6 View FIGURE 6 A). Gonopod aperture with rear margin slightly raised in the middle. Telopodites ( Fig. 10 View FIGURE 10 ) closely pressed together but not fused, the contact surfaces flat, the outer surface rounded. Telopodite base small with a few short and long setae; the distal portion of the telopodite ( Fig. 11 View FIGURE 11 ) arising medially, first bending cephalad, then curving smoothly caudad before expanding into a broad tip with a slightly rounded distal surface. Prostatic groove running along the mesal surface of the telopodite before turning laterad across the telopodite tip and ending in a very small, bluntly pointed solenomerite situated nearly in the middle of the tip. Arising from the anteromesal corner of the tip is a short, blunt process armed with 10–15 short, laterally directed setae; a cluster of ca. 20 variably long, peg­like structures, directed proximad and slightly laterad, is attached to the posterolateral corner of the tip.

Distribution and habitat: In well­rotted litter, humus and richly organic soil over ca. 11 0 0 0 km 2 in central Tasmania from 150 m to at least 1250 m, mainly in wet eucalypt forest and Nothofagus   rainforest ( Fig. 12 View FIGURE 12 D). Overlaps in range with P. bicalcar   , co­occurs with P. taurulus   . An uncommon species.

Etymology: Latin monticolus   , mountain­dwelling, adjective. This species has mainly been collected at higher elevations.


Australian Museum