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

description: <i>Tasmaniosoma laccobium</i> sp. n. urn:lsid:zoobank.org:act: 12CBDFC1-DC15-400E-9CD6-D03C6A75D359 Fig. 20; map Fig. 24 <b>Holotype.</b> Male, Australia, Tasmania, Lake Sydney, 43°17'15"S 146°36'52"E (DN 686070) ± 100 m, 690 m, 2 February 1994, R. Mesibov, QVM 23:46601, dissected, in genitalia vials. <b>Paratypes.</b> 1 stadium VI male, 1 stadium VI female, details as for holotype, QVM 23:51542. <b>Other material.</b> None known. <b>Diagnosis.</b> Gonopod telopodite apex divided into four processes, the central flattened process projecting posterobasally below (basal to) solenomere and lateral process. <b>Description.</b> Male with ring 12 paranota width ca 1.4 mm. Live colour not known; in alcohol decoloured. As for <i>T. armatum</i> in most non-gonopod details, but overall widths tergite 6&gt;5&gt;4&gt;(3,2,head)&gt;collum, antennomere 3 longest, ring 12 paranota 1.25 × as wide as prozonite, leg 6 tarsus 1.4 × as long as femur and femur longer than prefemur. Ring 2 pit circular with well-defined rim. Th ree barely detectable transverse rows of large, low tubercles on metatergites; just visible on holotype in lateral view with reflected light, not as well developed as in other <i>Tasmaniosoma</i> spp., e.g. <i>T. hickmanorum</i> sp. n. Leg 6 sternal tab short with brush of fine setae; no leg 7 tab; no setae on anterior margin of ring 6 sternite. Gonopod telopodite (Fig. 20) slender, tapering slightly distally, curved posteriorly, slightly constricted near base, with short, shelf-like basal extension posteriorly. Divided at ca 3/4 telopodite height into tight cluster of four processes: (a) slender, rod-like, slightly sinuous, medial solenomere directed posterodistally; (b) blade-like, mediolaterally flattened, apically acute process arising just anterior and basal to solenomere and curving posteriorly; (c) mediolaterally flattened central process directed posteriorly, the basal portion of the broad apex extending posterobasally as finger-like extension; (d) broad, anteroposteriorly flattened lateral process, the medial corner of wide, truncate apex extending just posterior to solenomere. Two groups of sparse, fine setae: posterobasal group reaching to ca 1/4 telopodite height, and longitudinal medial tract extending from ca 1/4 to ca 2/3 telopodite height. Prostatic groove running on medial surface more or less directly to solenomere base. Female not yet recognised. <b>Distribution.</b> So far known only from cool temperate rainforest at the type locality in the mountains of far southern Tasmania (Fig. 24). <b>Etymology.</b> Greek <i>lakkos</i>, “pond”, + <i>bios</i>, “life”, noun used as adjective, after the type locality, Lake Sydney. <b>Remarks.</b> Very similar to <i>T. hesperium</i> sp. n., differing mainly in gonopod details.
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 68-69, DOI: 10.3897/zookeys.41.420, http://zenodo.org/record/576649