Amastigogonus tasmanianus Broelemann , 1913

Mesibov, Robert, 2017, Iulomorphid millipedes (Diplopoda, Spirostreptida, Iulomorphidae) of Tasmania, Australia, ZooKeys 652, pp. 1-36 : 18

Amastigogonus tasmanianus Broelemann, 1913 Figs 3F, 4F, 5A, 8C

Amastigogonus tasmanianus Brölemann 1913: 153, figs 32-37. Attems 1914: 293. Chamberlin 1920: 167. Verhoeff 1944: 43. Jeekel 1971: 107; 1981: 40. Korsós and Read 2012: 45.

Lectotype

(here designated). Male, Tasmania, date and collector unknown, AM KS.125304 (ex KS.37403). Intact specimen in 12 mm glass vial in 80% alcohol with original label " Amastigogonus / tasmanianus m. / (H.W.B.)".

Paralectotypes.

Collection details as for lectotype, AM KS.37403. 1 female and parts of 2 dissected males: last 23 podous rings + apodous rings + telson, midbody 31 rings, head capsule + collum, and ring 7 (gonopods missing) and following 2 podous rings. Also 8 small filter-paper envelopes containing cleared body parts illustrated by Brölemann (1913). In 25 mm glass vial with original label " Amastigogonus / tasmanianus m. / (H.W.B.)".

Other material.

92 males, 1 probable female and 1 possible juvenile from 8 unique localities; details in Suppl. material 1.

Diagnosis.

Distinguished from all other Amastigogonus species by having a long, gradually tapering, narrowly ribbon-like pseudoflagellum.

Description.

Mature males observed with (46+2) rings, midbody diameter 2.5 mm to (67+1) rings, 3.4 mm. Cardo not deeper posteriorly. Leg 7 (only) with elongated coxa. Prefemoral pad 1/3-1/2 femur length (Fig. 5A). Striae on posterior metazonites reaching ca 1/2 of ozopore height.

Coxite process on anterior gonopod (Fig. 8C) with posterodistal margin not extended and folded over. Telopodite with single row of prominent setae on posterior and anterior sides of medial thickening. Pseudoflagellum arising at 1/3-1/2 telopodite height, ca 1/2 width of telopodite at base, ribbon-like, curving sinuously first posterodistally, then anterodistally, tapering abruptly to sharp point (ribbon-like apex of pseudoflagellum shown edge-on in Fig. 8C).

Distribution.

Eucalypt forest and cool temperate rainforest at scattered locations in northeast Tasmania (Fig. 7A), from ca 100 m elevation to at least 1000 m. Co-occurs with Amastigogonus fossuliger .

Remarks.

The types were in excellent condition when examined in 2016. Because it is not possible to decide which of the two dissected male syntypes (or both) was illustrated by Brölemann, I am unable to follow Recommendation 74B (Preference for illustrated specimen) of the International Code of Zoological Nomenclature in choosing a lectotype, and instead have selected the intact male syntype. The lectotype is the third of the three males listed by Brölemann (1913: 154): "length 44 m/m; diameter 2.80 m/m; 56 segments; three segments apodous; 99 pair of legs".

I suspect that the type locality is the Launceston area, and the QVM male illustrated in Figs 3F, 4F and 5A is from Mowbray in Launceston.