Gibbidessus drikdrikensis, Hendrich & Watts & Balke, 2020
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publication ID |
https://dx.doi.org/10.3897/zookeys.975.55456 |
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publication LSID |
lsid:zoobank.org:pub:785EDF22-5A32-4217-8C9B-6433E0AD199F |
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persistent identifier |
https://treatment.plazi.org/id/281FB8F4-C366-40CA-9358-6BF75CBCE8DD |
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taxon LSID |
lsid:zoobank.org:act:281FB8F4-C366-40CA-9358-6BF75CBCE8DD |
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treatment provided by |
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scientific name |
Gibbidessus drikdrikensis |
| status |
sp. nov. |
Gibbidessus drikdrikensis sp. nov. Figs 5 View Figures 5–7 , 17 View Figures 16, 17 , 22 View Figures 22, 23
Type locality.
Australia, Victoria, Drik Drik, old farm dam [37°59'27S, 141°17'18E].
Type material.
Holotype: Male, "1 km S, Drik Drik Vic. 24/9/98 C. Watts", “Photographed”, " SAMA Database No 25-004000", "Holotype Gibbidessus drikdrikensis sp.nov. Hendrich, Watts & Balke des. 2020" [red printed label] (SAMA). Paratypes (6 exs.): 6 specimens with same data as holotype. Two specimens with "DNA voucher b" and "DNA voucher c" and one with a yellow prointed label “photographed” (CLH, SAMA). All paratypes are provided with printed red paratype labels.
Diagnosis.
Medium-sized species which externally is characterised by a wide rounded body, shiny non-microreticulate dorsal surface, vague testaceous markings on elytra, and without slight habitus disruption between pronotum and elytron. Dorsoventrally rather domed. Cervical line present (Fig. 5 View Figures 5–7 ).
Measurements.
Holotype: TL = 1.7 mm, TL-H = 1.5 mm, MW = 0.98 mm. Paratypes: TL = 1.6-1.7 mm, TL-H = 1.4-1.5 mm, MW = 0.86-0.98 mm.
Head: Dark brown, around eyes almost black. Cervical line present. Strongly and coarsely punctate, rather shiny, microsculpture almost absent. Punctures weakly anteriorly and strongly posteriorly between eyes. Antennae relatively short, stout. Antennomeres 1 and 2 ferruginous, 3-11 darkened anteriorly.
Pronotum: Ferruginous, anterior and posterior margins darker. Disc of pronotum somewhat darkened, broadest at posterior corners. Punctation very weak, almost evenly distributed, shiny and microsculpture absent. Sides of pronotum margined and almost evenly rounded. Angle between pronotum and elytra not pronounced, basal pronotal plicae present. Striae well defined, almost 1/2 length of pronotum, strongly incurved.
Elytra: Ferruginous, with vague areas darkened (Fig. 5 View Figures 5–7 ). Coarsely and densely punctate, shiny, microsculpture absent. Striae strongly impressed, same length as basal pronotal striae but slightly straighter.
Ventral side: Ferruginous. Prothorax and abdomen paler than other parts. Metacoxae and metaventrite covered with numerous larger punctures, surface shiny, without microreticulation. Abdominal ventrites with dense and finer punctures, shiny, microreticulation absent. Metacoxal lines almost straight, anteriorly slightly divergent. Epipleuron testaceous, with few coarse punctures, shiny, lacking microsculpture. Legs ferruginous meta-/mesotarsi set in black.
Male. Dorsal surface with coarse punctures but otherwise with shiny surface (Fig. 5 View Figures 5–7 ). Median lobe of aedeagus as in Fig. 17A, B View Figures 16, 17 . Shape of median lobe fairly uniform, evenly bent in lateral view, apex straight and pointed at tip in ventral view. Parameres bi-segmented, broad and with few setae at apex (Fig. 17C, D View Figures 16, 17 ).
Affinities.
This species is very similar to G. chipi but readily separated by its larger size and the form of the median lobe and parameres (Figs 15 View Figures 14, 15 , 17 View Figures 16, 17 ).
Etymology.
The species is named after the type locality. The specific epithet is a substantive in the genitive case.
Distribution.
Only known from the type locality Drik Drik in south-western Victoria (Fig. 22 View Figures 22, 23 ).
Habitat.
The few specimens were collected in shallow water at the edge of a large, exposed but shallow farm dam, overgrown with grasses and sedges. The species is syntopic with G. chipi .
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.