Psammoecus australis, Karner, 2020

Karner, Michael, 2020, Taxonomic Studies on Australian Psammoecus Latreille (Coleoptera, Silvanidae, Brontinae), European Journal of Taxonomy 723, pp. 135-158: 149-152

publication ID

https://doi.org/10.5852/ejt.2020.723.1149

publication LSID

lsid:zoobank.org:pub:9EF35D01-815A-4DD0-8AC2-CC65E19B81B4

persistent identifier

http://treatment.plazi.org/id/B8F383AA-30E8-4CE3-B033-600DEFFEF03E

taxon LSID

lsid:zoobank.org:act:B8F383AA-30E8-4CE3-B033-600DEFFEF03E

treatment provided by

Valdenar

scientific name

Psammoecus australis
status

sp. nov.

Psammoecus australis   sp. nov.

urn:lsid:zoobank.org:act:B8F383AA-30E8-4CE3-B033-600DEFFEF03E

Fig. 6 View Fig

Diagnosis

The following combination of character states distinguishes this species: body length 1.96–2.45 mm; eyes very large, evenly rounded; temples extremely short, strongly narrowed immediately behind eyes; frontal grooves diverging posteriorly, reaching middle of eyes; punctation on vertex very sparse; pronotal punctation sparse; pronotal teeth long; lateral pronotal margin simple; lateral elytral interstices with very long setae; median lobe wide, apex blunt, rounded; parameres short, roundish.

Etymology

The specific epithet is derived from the continent name Australia.

Material examined

Holotype

AUSTRALIA • ♂; Queensland, Cook Shire, 30 km S of Cooktown, Mt Finnigan Sl. ; 400 m a.s.l.; 3 Jul. 1982; S. and J. Peck leg.; rainforest, moist litter; ANIC.  

Paratypes

AUSTRALIA – Queensland – Cairns Region • 1 spec.; Bellenden, Ker Range, Cable Tower 3; 1054 m a.s.l.; 17°16′12.04″ S, 145°53′59.76″ E; 25–31 Oct. 1981; rainforest, stick brushings; ANIC GoogleMaps   1 spec.; same locality; 17 Oct.–9 Nov. 1981; pyrethrum knockdown; ANIC GoogleMaps   1 spec.; Bellenden, Ker Range, Cableway Base Station ; 100 a.s.l.; 17°16′ S, 145°54′ E; 25–31 Oct. 1981; rainforest, sieved litter; ANIC GoogleMaps   10 specs; same locality; 17–24 Oct. 1981; rainforest, sieved litter; ANIC GoogleMaps   3 specs; same data as for preceding; MKF GoogleMaps   2 specs; Bellenden, Ker Range, Cableway Base Station ; 100 m a.s.l.; 17°16′12.04″ S, 145°53′59.76″ E; 25–31 Oct. 1981; rainforest, sieved litter; ANIC GoogleMaps   2 specs; Mulgrave River Road , 7 km SW of Bellenden, Ker; 60 m a.s.l.; 17°16′ S, 145°47′ E; 2 Apr. 1984; Calder and Weir leg.; rainforest; ANIC GoogleMaps   . – Cassowary Coast Region • 1 spec.; Mission Beach ; 10 m a.s.l.; 17°50′ S, 146°06′ E; 29 Jan.–4 Mar. 1996; Cermak leg.; Malaise trap; ANIC GoogleMaps   2 specs; Mission Beach ; 40 m a.s.l.; 17°52′ S, 146°04′ E; 29 Jan.–4 Mar. 1996; Cermak leg.; flight intercept trap; ANIC GoogleMaps   1 spec.; same locality; 4 Mar.–1 Apr. 1996; Cermak leg.; flight intercept trap; ANIC GoogleMaps   . Shire of Douglas • 2 specs; 2 km SSW of Cape Tribulation ; 10 m a.s.l.; 16°05′ S, 145°28′ E; 28 Feb.–27 Mar. 1996; Zborowski leg.; flight intercept trap; ANIC GoogleMaps   1 spec.; 1 km WNW of Cape Tribulation; 10 m a.s.l.; 16°04′ S, 145°28′ E; 5 Dec. 1995 – 4 Jan. 1996; Umback leg.; flight intercept trap; ANIC GoogleMaps   1 spec.; 2 km WSW of Cape Tribulation; 30 m a.s.l.; 16°05′ S, 145°27′ E; 4 Jan.–1 Feb. 1996; Umback leg.; pitfall trap; ANIC GoogleMaps   1 spec.; same locality; 1–28 Feb. 1996; Umback leg.; pitfall trap; ANIC GoogleMaps   1 spec.; same locality; 28 Feb.–27 Mar. 1996; Zborowski leg.; flight intercept trap; ANIC GoogleMaps   4 specs; Cape Tribulation Area ; 16°03′ S, 145°28′ E; 1–11 May 1992; Lawrence leg.; leaf and log litter; ANIC GoogleMaps   2 specs; 45 km N of Port Douglas, Cape Tribulation ; 16°03′ S, 145°28′ E; 21–28 Mar. 1984; Calder and Weir leg.; lowland rainforest; ANIC GoogleMaps   2 specs; 40 km N of Daintree, Cape Tribulation ; 10 m a.s.l.; 12 Jul. 1982; S. and J. Peck leg.; rainforest, leaf and log litter; ANIC   1 spm; same data as for preceding; MKF   1 spec.; Shire of Cook, Moses Creek 4 km NE of Mount Finnigan; 15°47′ S, 145°17′ E; 14–16 Oct. 1980; Weir leg.; rainforest litter; ANIC GoogleMaps   1 spec.; Shire of Cook, 30 km S of Cooktown, Mt Finnigan ; 400 m a.s.l.; 1 Jul. 1982; S. and J. Peck leg.; rainforest, litter and fungi; ANIC   1 spec.; Kuranda, Black Mountain Road ; 390 m a.s.l.; 17°26′ S, 145°35′ E; 22 Jun. 1971; Feehan leg.; rainforest; ANIC GoogleMaps   1 spec.; Kuranda, Black Mountain Road ; 350 m a.s.l.; 27 Jun. 1971; Feehan leg.; ANIC   1 spec.; Shire of Cook , 3 km NE of Mount Webb; 15°03′ S, 145°09′ E; 1–3 Oct. 1980; Weir leg.; rainforest litter; ANIC GoogleMaps   3 specs; Shire of Cook, Cape York Peninsula , Mount Webb National Park ; 15°04′ S, 145°07′ E; 28–30 Sep. 1980; Weir leg.; rainforest litter; ANIC GoogleMaps   1 spec.; Shire of Douglas, Mossman Gorge National Park , 6 km SW of Mossman; 50 m a.s.l.; 11 Jul. 1982; S. and J. Peck leg.; rainforest leaf litter; ANIC   3 specs; Shire of Douglas, Daintree, Pilgrims Sands ; 10 m a.s.l.; 20–27 Jan. 1991; Hammond leg.; lowland tropical forest, flight interception trap; NHMUK   1 spm; same data as for preceding; MKF   2 specs; Shire of Lockhart River , 9 km ENE of Mount Tozer; 12°43′ S, 143°17′ E; 5–10 Jul. 1986; Weir leg.; rainforest litter; ANIC GoogleMaps   .

Description of holotype

Body oval, stout, 2.13 mm long; testaceous ( Fig. 6A View Fig ); elytra with dark maculae near middle and near apex; antennomeres 8–9 slightly and 7 very slightly darkened, antennomeres 10–11 whitish ( Fig. 6D View Fig ). Head ( Fig. 6B View Fig ) 0.36 mm long, 0.55 mm wide; frontal grooves distinct, deep, curved outwards toward posterior end, reaching middle of eyes; vertex with sparse punctation, punctures small; setae of very uneven lengths, directed straight forward, seta near end of each frontal groove almost as long as eyes, shortest setae only as long as two eye facet diameters; microsculpture absent; eyes large, strongly protruding, unevenly rounded, 0.16 mm long, eye distance 0.32 mm; temples absent, head narrowed immediately behind eyes, temple angle 83°; antennae ( Fig. 6D View Fig ) long, slender, length 1.29 mm, antennomere proportions 3.0: 1.1: 1.3: 1.4: 1.5: 1.4: 1.4:1.2: 1.1: 1.0: 2.7. Pronotum ( Fig. 6C View Fig ) 0.63 mm wide, 0.43 mm long, widest at anterior third; at anterior denticles 1.32 × as wide as at posterior denticles; very shallowly impressed near posterior margin; lateral margin slightly ridged between lateral teeth III and V, with distinct group of three anterior denticles and additional small denticles along anterior pronotal margin, lateral margin with distinct teeth; I small, only slightly larger than anterior denticles, II to IV of increasing length, V as large as III; posterior denticle distinct, slightly smaller than anterior denticles; punctation on pronotal disc slightly denser than on vertex, punctures somewhat smaller than eye facet diameter; setae on pronotal disc of very uneven lengths, directed anteromedially, longest setae about ³⁄5 as long as eyes, shortest 1.5 × as long as eye facet diameter.

Elytra ( Fig. 6A View Fig ) oval, 1.29 mm long, 0.94 mm wide, striae twice as wide as interstices, pubescence semierect, interstrial setae about twice as long as strial setae, even longer near elytral margins; interstice between 9 th and 11 th stria with distinct denticles near humerus; microsculpture absent. Male genitalia ( Fig. 6 View Fig E–G) with wide median lobe, apex evenly rounded, in the shape of a half-circle, parameres short, stout, almost circular in ventral view, each with one very long and several shorter setae.

Distribution

Australia (Queensland).

Biology

The species was found in flight intercept traps, in berlese funnels and in plant detritus.

Variation

Paratypes range in length: 1.96–2.45 mm. The elytral maculae differ considerably in size. In some specimens, only the 11 th antennomere is whitish.

Remarks

Psammoecus australis   sp. nov. is closely related to Psammoecus delicatus Grouvelle, 1908   and Psammoecus complexus Pal, 1985   . It can be distinguished from P. complexus   by the distinctly different colouration, and from both species by the different shape of lateral pronotal teeth and male genitalia.

ANIC

Australia, Australian Capital Territory, Canberra City, CSIRO, Australian National Insect Collection

ANIC

Australian National Insect Collection

NHMUK

Natural History Museum, London