Tholerosoma corrugatum, Mesibov, Robert, 2006

Mesibov, Robert, 2006, Dirt-encrusted and dragon millipedes (Diplopoda: Polydesmida: Paradoxosomatidae) from Queensland, Australia, Zootaxa 1354, pp. 31-44: 42-43

publication ID 10.5281/zenodo.174573

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scientific name

Tholerosoma corrugatum

n. sp.

Tholerosoma corrugatum  n. sp.

Figs. 5View FIGURE 5 B, 5 C, 5 F, 6 A, 6 C; map Fig. 7View FIGURE 7

Holotype: Male, Mt Elliot summit , 19 ° 30 ’S 146 ° 57 ’E, 1150 m, January to 26.iii. 1991, A. Graham, fern glade, pitfall & intercept, QM S 73993View Materials.GoogleMaps 

Paratypes: Male, Stony Creek, track crossing , 21 ° 37 ’S 148 ° 59 ’E, 280 m, 4.x.– 17.xii. 1999, D. & I. Cook, rainforest, pitfall, sample 9030, QM S 73994View MaterialsGoogleMaps  ; female, Bluewater Range , 45 km WNW of Townsville, 19 ° 12 ’S 146 ° 24 ’E, 600–700 m, 6–8.xii. 1986, G. Monteith, G. Thompson & S. Hamlet, QM S 73995View MaterialsGoogleMaps  ; stadium VII female, Mt Hayward , 20 ° 20 ’S 148 ° 45 ’E, 350 m, 19–20.xi. 1992, G. Monteith, G. Thompson, D. Cook & H. Janetzki, QM S 73996View MaterialsGoogleMaps  ; female, Palm Island site 1, 18° 45 ’S 146 ° 36 ’E, 450 m, 21.ii. 2001, G. Monteith, rainforest, sample 8323, QM S 73997View MaterialsGoogleMaps  .

Diagnosis: Distinguished from T. monteithi  by having 6 small swellings on posterior edge of metatergite, rather than 2 large paramedian swellings on either side of transverse furrow; distal portion of telopodite curving towards base; and spiracles without plate-like structures on surface.

Description: As for T. monteithi  , but in overall size at the lower end of the T. monteithi  range. Collum and metatergites with 6 small, oblong swellings on posterior edge, often hidden by encrusting dirt ( Figs. 5View FIGURE 5 F, 6 A). Longitudinal corrugations at waist not as long or as deep as in T. monteithi  . Spiracles protruding, densely filled with extremely minute, blunt processes as in T. monteithi  , but without plate-like structures on surface ( Fig. 6View FIGURE 6 C). Distal portion of gonopod telopodite tapering gradually, curving towards base after abrupt lateral turn; tip pointed towards base in holotype ( Fig. 5View FIGURE 5 B).

Distribution and habitat: Known from five sites in tropical rainforest from Palm Island north of Townsville to the Mackay area in north Queensland, an approximate linear range of 430 km and an elevation range of 280–1150 m. Sympatric with T. monteithi  in the Bluewater Range near Townsville.

Etymology: Latin corrugatus (“ridged”), from the appearance of the posterior edge of the metatergite.

Remarks: Only two males of T. corrugatum  are known, from sites more than 350 km apart, and while the specimens agree in other details, the tip of the telopodite turns distally in the paratype ( Fig. 5View FIGURE 5 C). The two nominal species of Tholerosoma  are most easily distinguished by the absence of large paramedian swellings in T. corrugatum  . The sympatry of the two species is probably syntopy: both were taken at a single collecting site in the Bluewater Range in 1986.


Australia, Queensland, South Brisbane, Queensland Museum


Queensland Museum