Tasmaniosoma orientale Mesibov 2010, sp. n.
Creators: name: Mesibov, Robert
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Polydesmida
Dalodesmidae
Tasmaniosoma
Tasmaniosoma orientale

description: <i>Tasmaniosoma orientale</i> sp. n. urn:lsid:zoobank.org:act: 783D6984-EE76-4BC7-86A8-8C9B883E5C30 Fig. 21; map Fig. 26 <b>Holotype.</b> Male, Australia, Tasmania, Elephant Pass, 41°38'26"S 148°14'32"E (FP 034892) ± 25 m, 340 m, 20 August 2009, R. Mesibov, QVM 23:51551. <b>Paratypes.</b> 1 male, Tinmine Creek, Tas, 41°41'55"S 148°11'41"E (EP 993828) ± 250 m, 530 m, 11 June 1988, R. Mesibov, QVM 23:45991; 1 male, same details but 41°42'08"S 148°12'38"E (FP 006824) ± 250 m, 450 m, 22 June 1988, QVM 23:46000; 1 female, same details, QVM 23:46001; 1 female, same details but 41°41'33"S 148°10'36"E (EP 978835) ± 250 m, 550 m, 29 June 1988, QVM 23:46008; 1 male, same details but 41°41'59"S 148°11'15"E (EP 987827) ± 250 m, 500 m, 30 June 1988, QVM 23:51550. <b>Other material examined.</b> 37 males and 38 females from 43 other sites (see Appendix). <b>Diagnosis.</b> Metatergites without tubercles; ring 6 sternite with discrete setal brushes on anterior margin; gonopod telopodite with stout, rod-like setae in longitudinal tract on posteromedial surface and solenomere divided into apically bifid distal branch and distally curved, acuminate basal branch. <b>Description.</b> Male/female approximate measurements: length 16/ 16 mm, ring 12 paranota width 1.8/ 1.8 mm. Male as for <i>T. armatum</i> in live colour and most non-gonopod details, but long-preserved specimens completely decoloured, overall widths tergite 6&gt;5&gt;4&gt;3&gt;(2,head)&gt;collum, ring 12 paranota 1.4 × as wide as prozonite. Ring 6 sternite as for <i>T. armatum</i>, but with very short, thin sternal tab by leg 6, not bearing setae. Gonopod telopodite (Fig. 21) similar to that of <i>T. armatum</i> (see Fig. 7A), but process 1 simply acute (but see Remarks) rather than Y-shaped; process 2 undivided, curving medially, apically expanded and flattened with dentate margin; distal margin of laminate process not extended posteriorly, instead curving smoothly to posterior extension, the latter shorter and straighter than in <i>T. armatum</i>; solenomere divided into distal branch with bifid tip carrying prostatic groove, and basal branch directed posteriorly but curving distally, with pointed tip; process 3 an anteroposteriorly flattened, quadrate tab, the margin free distally apart from central attachment; process 4 as in <i>T. armatum</i>; laterally with group of 5–6 setae, rather than three. Female with posterior margin of epigynum raised in centre as irregularly edged triangle. <b>Figure 2 |.</b> <i>Tasmaniosoma orientale</i> sp. n. <b>A</b> Posterolateral view of gonopods in situ, voucher male ex QVM 23:46018 <b>B</b> medial and <b>C</b> posterolateral views of left gonopod telopodite of paratype male ex QVM 23:51550. Setation not shown in <b>A</b> and <b>C</b>; dashed line marks course of prostatic groove. Processes labelled as in Fig. 7A. Scale bars = 0.2 mm. <b>Distribution.</b> Common and sometimes locally abundant in dry and wet eucalypt forest over ca 1500 km 2 in the northern part of the east coast and Eastern Tiers of Tasmania, from near sea level to at least 1000 m elevation (Fig. 26). Not yet found north of Beaumaris or south of Bicheno on the coast, or west of St Pauls Dome in the Fingal Valley. Sympatric with <i>T. barbatulum</i> sp. n. and <i>T. fragile</i> sp. n.; co-occurs with the latter. <i>T. orientale</i> may be parapatric with <i>T. armatum</i> in the west and south of its range, and with <i>T. cacofonix</i> sp. n. in the north; further sampling is needed to better define the range boundaries of these three species. <b>Etymology.</b> Latin <i>orientalis</i>, “eastern”, for the eastern Tasmanian distribution of this species. <b>Remarks.</b> The lateral process on the gonopod telopodite (process 1) is simply acute in the holotype and the specimen illustrated in Figs 21B and 21C. In some East Coast males the process is apically forked, as in the right telopodite in Fig. 21A. In the west of the <i>T. orientale</i> range, the lateral process is wider and Y-shaped, as in <i>T. armatum</i>. Female <i>T. orientale</i> are readily distinguished from those of sympatric, similarly sized <i>T. fragile</i> sp. n. by the presence of large tubercles on <i>T. fragile</i> tergites.
description: Published as part of <i>Mesibov, Robert, 2010, The millipede genus Tasmaniosoma Verhoeff, 1936 (Diplopoda, Polydesmida, Dalodesmidae) from Tasmania, Australia, with descriptions of 18 new species, pp. 31-80 in ZooKeys 41 (4)</i> on pages 71-72, DOI: 10.3897/zookeys.41.420, http://zenodo.org/record/576649