Gracilanillus Baehr & Main, 2016

Giachino, Pier Mauro, Eberhard, Stefan & Perina, Giulia, 2021, A rich fauna of subterranean short-range endemic Anillini (Coleoptera, Carabidae, Trechinae) from semi-arid regions of Western Australia, ZooKeys 1044, pp. 269-337 : 269

Gracilanillus Baehr & Main, 2016 Figs 4-7

Type species.

Gracilanillus longulus Baehr & Main, 2016.

Note.

Baehr and Main’s description (2016) is correct and detailed, although we noted a few inaccuracies and their description omits some important characters fundamental to the systematics of Anillini which are described as follows. Baehr and Main (2016) describe three setae on the elytral disc of Gracilanillus genus, and later in the paper they specify that G. longulus Baehr & Main, 2016, G. cockingi Baehr & Main, 2016 and G. cordatus Baehr & Main, 2016 bear only two setae, G. vixsulcatus Baehr & Main, 2016 bear only one seta, and that in G. minutus Baehr & Main, 2016 and G. currani Baehr & Main, 2016 have none. The two additional Gracilanillus species that we describe herein bear two setae, and we suggest that considering the difficulty of observing all setae if specimens are not examined using the methods as described in this paper, possibly all species in this genus share the character "two setae on the elytral disc".

Baehr and Main (2016) refer to a “faint” labial tooth, while the two species described here do not possess this character. The labial tooth is not an important character at genus level ( Giachino 2005; Giachino and Vailati 2011), and also it is very difficult to see if the specimen is not properly prepared. Baehr and Main (2016) do not mention the position of the elytral umbilicate setae, but only talk about "very long setae". The position of these setae is fundamental ( Jeannel 1963; Giachino 2005; Giachino and Vailati 2011), hence we specify the position, type “B” (sensu Jeannel 1963; Giachino and Vailati 2011). For additional details see descriptions.

Species included.

Seven species currently belong to this genus:

Gracilanillus hirsutus sp. nov.

Gracilanillus pannawonicanus sp. nov.

Gracilanillus longulus Baehr & Main, 2016

Gracilanillus cockingi Baehr & Main, 2016

Gracilanillus cordatus Baehr & Main, 2016

Gracilanillus vixsulcatus Baehr & Main, 2016

Gracilanillus currani Baehr & Main, 2016

Figures

Figures 4 - 7. Gracilanillus spp.: habitus HT ♀ (4, 6) left metafemur and metatrochanter in ventral view HT ♀ (5, 7) 4, 5 G. hirsutus sp. nov. 6, 7 G. pannawonicanus sp. nov. Scale bars: 0.1 mm.