Tasmaniosoma barbatulum, Mesibov, 2010

Mesibov, Robert, 2010, The millipede genus Tasmaniosoma Verhoeff, 1936 (Diplopoda, Polydesmida, Dalodesmidae) from Tasmania, Australia, with descriptions of 18 new species, ZooKeys 41 (4), pp. 31-80: 46-48

publication ID

http://doi.org/ 10.3897/zookeys.41.420

publication LSID

lsid:zoobank.org:pub:FC5CFE57-05F9-4685-BC02-BB82AB9E4894

DOI

http://doi.org/10.5281/zenodo.3788464

persistent identifier

http://treatment.plazi.org/id/6B10878B-F81C-A556-FF34-FCC4FCCEFED1

treatment provided by

Plazi

scientific name

Tasmaniosoma barbatulum
status

sp. n.

Tasmaniosoma barbatulum   sp. n.

urn:lsid:zoobank.org:act:8B93AB56-F248-4A5C-99C9-EBAC6901ED28

Figs 3B View Figure 3 , 5B View Figure 5 , 10A; map Fig. 25 View Figure 25

Holotype. Male, Australia, Tasmania, Scamander , 41°26'45"S 148°14'51"E ( FQ 041108 View Materials ) ± 100 m, 80 m, pitfall emptied January 2001, R. Bashford, QVM 23 View Materials :51554. GoogleMaps  

Paratypes. 1male, Th ompsons Marshes, Tas, 41°41'54"S 148°13'21"E ( FP 016828 View Materials ) ± 250 m, 490 m, 9 June 1988, R. Mesibov, QVM 23 View Materials :51521 GoogleMaps   ; 1 male, S of Dogwood Hill , Tas, 41°41'07"S 148°10'48"E ( EP 981843 View Materials ) ± 250 m, 580 m, 14 July 1988, R. Mesibov, QVM 23 View Materials :51522 GoogleMaps   ; 2 males, details as for holotype, QVM 23 View Materials :51512   .

Other material. None known.

Diagnosis. Metatergites with three transverse rows of large, low, contiguous tubercles; leg 7 sternal tab with dense brush of stout, rod-like setae; gonopod telopodite with two combs of long, stout, rod-like setae, the posterior comb directed basally, the anterior comb distally.

Description. Male ca 10 mm long, ring 12 paranota width ca 1.0 mm. Live colour not known; in alcohol completely decoloured.

Most non-gonopod details as for T. armatum   , but antennal sockets separated by ca 2.5 × socket diameter, relative widths tergite 6>(5,head)>4>(3,2)>collum, ring 12 paranota ca 1.2 × as wide as prozonite, brush setae lacking on femur, gonopod aperture rim not produced. Metatergite ( Fig. 3B View Figure 3 ) almost completely covered with three transverse rows of ca 12 large, low tubercles, each with small seta near posterior edge. Ring 2 pit not apparent except as slight concavity near anterior margin of ring. Ring 6 sternite

Figure |0. Posterior views of gonopod telopodites in situ of topotypical male paratypes, with solenomere (s) indicated. A Tasmaniosoma barbatulum   sp. n., ex QVM 23:51512 B Tasmaniosoma clarksonorum   sp. n., ex QVM 23:46583. Scale bars: (A) = 0.1 mm, (B) = 0.2 mm. Slight bending of flattened apical process in (A) is a preparation artifact; tip of central branch of central process on right telopodite in (B) is broken off. Portions of the background in (A) have been digitally edited for clarity.

( Fig. 5B View Figure 5 ) with short leg 6 tab bearing a few fine setae; leg 7 tab long, thickened, with brush of stout setae; a few fine setae on anterior margin of sternite.

Gonopod telopodite (Fig. 10A) subcylindrical with small posterior extension at base, concave distally. Apex slightly produced posteriorly as rounded, thickened ridge, oriented obliquely to telopodite longitudinal axis (medial end of ridge lowest); basal surface of ridge with comb of 15–20 stout, pointed, rod-like setae, up to ca 1/4 telopodite height in length, directed basally. Solenomere short. cylindrical, acute, arising from medial end of ridge on distal side, directed distally. Telopodite apex with laminate process arising anteromedially; outer edge of process extended distally as long, rounded-truncate tab and medially as short, round-tipped tab, and bearing a small, flattened process arising mid-laterally near laminate process base and directed posterodistally. Anterior surface of telopodite with comb of 5–10 stout, pointed, rod-like setae, directed distally and arising in near-longitudinal row, increasing in length distally. A few fine setae posterolaterally near telopodite base and on concave surface of basal extension; ca 6 fine setae in midlength lateral row. Prostatic groove running distally on medial surface of telopodite directly to solenomere base.

Female not yet recognised.

Distribution. Known from dry and wet eucalypt forest at three sites on the northern part of the east coast of Tasmania, from Scamander to ca 10 km south of St Marys, a distance of ca 30 km ( Fig. 25 View Figure 25 ). Sympatric with T. orientale   sp. n.

Etymology. Latin barbatulus, “with a small beard”, adjective, for the basally directed comb of rod-like processes on the gonopod telopodite.

R

Departamento de Geologia, Universidad de Chile