Namea dahmsi Raven, 1984

Rix, Michael G., Wilson, Jeremy D. & Harvey, Mark S., 2020, The open-holed trapdoor spiders (Mygalomorphae: Anamidae: Namea) of Australia’s D’Aguilar Range: revealing an unexpected subtropical hotspot of rainforest diversity, Zootaxa 4861 (1), pp. 71-91 : 84-85

Namea dahmsi Raven, 1984

( Figs 7, 11 , 13 , 21 a–c)

Namea dahmsi Raven, 1984: 24 , figs 17, 20, 40, 50, 62, 90, 99, 110. Rix et al., 2020: 707 , figs 2, 3, 81–86, 90–102.

Type material. AUSTRALIA: Queensland: male holotype, Calamvale, Brisbane , February 1978, E. Dahms ( QMB S800 ) . Paratypes: 1 female (allotype), same data as holotype except March 1973 ( QMB S801 ) ; 1 male, Mount Nebo , 14 May 1980, G. Snell ( QMB S804 ) ; 1 male, same data except 23 January 1979, B. Barbey ( QMB S803 ) .

Select material examined. Australia: Queensland: 1 female, Clear Mountain Conservation Park, Clear Mountain, off Clear Mountain Road, 27°18’04”S, 152°52’44”E, hand collected from burrow, open forest, 218 m, 6 February 2019, M. Rix, J. Wilson ( QMB S111381 DNA) ; 1 male, Clear Mountain, 20 km NW. of central Brisbane , 22 January 2009, D. Brown ( QMB S88018 ) ; 1 male, Enoggera Reservoir , site 3, 27°27’S, 152°55’E, pitfall trap, rainforest, 100 m, 27 January–15 March 2000, G. Monteith, J. Holt ( QMB S63050 ) ; 1 female, Mount Elliot Road, E. of Flinders Peak Conservation Park , 27°49’21”S, 152°50’32”E, hand collected from burrow, riparian creek line, 142 m, 15 May 2019, M. Rix, J. Wilson ( QMB S111481 DNA) .

Diagnosis. Males of Namea dahmsi can be distinguished from those of all other described congeners except N. callemonda Raven, 1984 by the morphology of the embolus, which is short and positioned terminally on the palpal bulb ( Fig. 21b ; see also Rix et al. 2020, figs 100–102). Males can be further distinguished from those of N. callemonda by the much shorter tibial macroseta v1 ( Fig. 21a ; cf. Rix et al. 2020, fig. 160), and by the presence of multiple proximal and/or medial macrosetae on the retroventral margin of the palpal tibia ( Fig. 21b ; cf. Rix et al. 2020, figs 161, 162).

Females are similar to those of N. callemonda and N. salanitri in having short receptacula ( Fig. 21c ), but can be distinguished by the inwardly-directed spermathecae ( Fig. 21c ; cf. Fig. 20c ; see also Raven 1984, fig. 99) and the absence of epigastric lobes ( Fig. 21c ; cf. Fig. 20c ).

Distribution. Namea dahmsi is a widespread species in south-eastern Queensland, where it has been recorded from open forest and dry rainforest habitats, in both lowland and upland areas ( Rix et al. 2020). On the D’Aguilar Range it is known from Mount Nebo ( Fig. 2 ) and Enoggera Reservoir, and has also been collected nearby at Clear Mountain.

Remarks. This species is unusual in being one of the few Namea species recorded from more open dry sclerophyll forest, although it is also known from dry rainforest and riparian habitats, and is generally rare and sparsely distributed throughout its range. The spiders are large and strongly built, with females and juveniles characterised by a dark body colouration, reflective gold carapace setae, and honey-red legs ( Fig. 7 ). Males appear to be active throughout the year.

Figures

FIGURE 13. Phylogeny of the genus Namea modified from Rix et al. (2020; fig. 2), inferred from a partitioned Bayesian analysis of that study’s ‘FULL’ dataset (151 taxa, 5,261 bp, 50% majority-rule consensus tree). Clades corresponding to 30 morpho-species OTUs are collapsed for the genus Namea (square brackets denote the number of specimens included in each clade), and nodes have a posterior probability of ≥ 0.98 unless otherwise stated. Seven species recorded from the D’Aguilar Range (south-eastern Queensland) are highlighted in enlarged bold text; note that specimens of an eighth species, N. gloriosa sp. nov., were not sequenced for this study.

FIGURES 4–12. Live habitus images and burrows of Namea from the D’Aguilar Range (south-eastern Queensland). 4–8, Live habitus images: 4, female N. brisbanensis Raven, 1984 from Gold Creek Reserve (note left leg IV missing); 5, paratype female N. gowardae sp. nov. from Mount Glorious; 6, female N. salanitri Raven, 1984 from Mount Mee; 7, female N. dahmsi Raven, 1984 from Clear Mountain; 8, subadult juvenile N. nigritarsus sp. nov. from Mount Glorious. 9–12, Burrow images: 9, burrow of unidentified Namea (N. nigritarsus sp. nov. or N. nebo sp. nov.; not collected) from Mount Nebo, with spider at entrance; 10, burrow of N. gowardae sp. nov. from Mount Glorious, with spider at entrance; 11, burrow of N. dahmsi from Clear Mountain; 12, burrow of N. nigritarsus sp. nov. from Mount Mee. Images 4–8, 10, 11 by M. Rix; 9, 12 by J. Wilson.

FIGURES 14–21. Comparative morphology of Namea from the D’Aguilar Range (south-eastern Queensland); each figure for each species depicts (a) the male tibia I in standardised prolateral view, (b) the male pedipalp in retrolateral view, +/- (c) the female cleared genitalia in dorsal view (if known): 14, N. gloriosa sp. nov. (QMB S10269); 15, N. nigritarsus sp. nov. (QMB S111534); 16, N. nebo sp. nov. (QMB S65274); 17, N. excavans Raven, 1984 (QMB S813); 18, N. brisbanensis Raven, 1984 (QMB S767 [male], S111397 [female]); 19, N.gowardae sp. nov.(QMB S774 [male], S111377 [female]); 20, N. salanitri Raven, 1984 (QMB S1166 [male], S111396 [female; with epigastric lobes highlighted*); 21, N. dahmsi Raven, 1984 (QMB S88018 [male tibia I], S800 [male pedipalp], S111481 [female; note bent right spermathecal fundus]). Tibial macrosetae are coloured and labelled according to their relative position (dark blue, prodorsal [pd]; red, prolateral [p] or proventral [pv]; dark grey, ventral [v]; light blue, retroventral [rv]).

FIGURES 1–3. The D’Aguilar Range of south-eastern Queensland: 1, elevational heat map showing upland areas surrounding Brisbane, and the relative position of the D’Aguilar Range; 2, topographic map of the D’Aguilar Range (in shaded relief), with major localities highlighted; 3, typical habitat for Namea on rainforest bank at Mount Glorious (Maiala section). Image 3 copyright Queensland Museum (used with permission).