Gibbidessus kangarooensis, 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/9CD26871-28DA-4A6E-A9FC-DBC0F74A6DC6 |
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taxon LSID |
lsid:zoobank.org:act:9CD26871-28DA-4A6E-A9FC-DBC0F74A6DC6 |
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treatment provided by |
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scientific name |
Gibbidessus kangarooensis |
| status |
sp. nov. |
Gibbidessus kangarooensis sp. nov. Figs 6 View Figures 5–7 , 18 View Figures 18, 19 , 22 View Figures 22, 23
Type locality.
South Australia, Kangaroo Island, Eleaner River at South Coast [Road] Crossing, edge sample [35°56'S, 137°14'E].
Type material.
Holotype: Male, "Eleaner R. S, Coast rd AWQ [Australian Water Quality] survey 8/11/95 site 3714 [35°56'S, 137°14'E]" "Holotype Gibbidessus kangarooensis sp. nov. Hendrich, Watts & Balke des. 2020" [red printed label] (SAMA).
Diagnosis.
Small species which externally is characterised by a more elongate body, shiny non-microreticulate dorsal surface, and with well pronounced habitus disruption between pronotum and elytron. Dorsoventrally rather flattened. Without cervical line but rather a few punctures instead (Fig. 6 View Figures 5–7 ).
Measurements.
Holotype: TL = 1.55 mm, TL-H = 1.4 mm, MW = 0.88 mm.
Head: Ferruginous, without cervical line but rather a few punctures instead. Evenly and coarsely punctate, shiny, microsculpture absent. Punctures weakly anteriorly and strongly posteriorly between eyes. Antennae missing.
Pronotum: Ferruginous, anterior and posterior margins darker, broadest at middle. Punctation weak anteriorly but quite strong on posterior half and on lateral sides, almost evenly distributed, shiny and microsculpture absent. Sides of pronotum broadly margined and almost evenly rounded. Angle between pronotum and elytra well pronounced, basal pronotal and elytral plicae present. Striae moderately defined, almost 1/2 length of pronotum, strongly incurved.
Elytra: Dark brown with vague basal area ferruginous (Fig. 6 View Figures 5–7 ). Coarsely and densely punctate, shiny, microsculpture absent. Striae weakly impressed, slightly straighter and of same length as basal pronotal striae.
Ventral side: Ferruginous. Prothorax and apex of abdomen paler than other parts. Metacoxae and metaventrite covered with numerous larger punctures, surface shiny, without microreticulation. Abdominal ventrites with finer punctures, shiny, microreticulation absent. Metacoxal lines almost straight, anteriorly slightly divergent. Epipleuron ferruginous, coarsely punctate, shiny, lacking microsculpture. Legs ferruginous with meta-/mesotibia and meta-/mesotarsi somewhat darkened.
Male. Dorsal surface with coarse punctures but otherwise with shiny surface (Fig. 6 View Figures 5–7 ). Median lobe of aedeagus as in Fig. 18A, B View Figures 18, 19 . Shape of median lobe, bent evenly and fairly uniform in lateral view, in ventral view pointed at apex. Parameres bi-segmented, elongated, and with few setae at apex (Fig. 18C, D View Figures 18, 19 ).
Female. Unknown.
Affinities.
This species is similar to G. pictipes but readily separated by the different colour pattern and the more flattened body. Furthermore, both species can be separated by the form of the median lobe and parameres (Figs 18 View Figures 18, 19 , 20 View Figures 20, 21 ).
Etymology.
The species is named after the type locality. The specific epithet is a substantive in the genitive case.
Distribution.
A rare species, only known from the type locality on Kangaroo Island, South Australia (Fig. 22 View Figures 22, 23 ).
Habitat.
The single specimen was collected at the edge of the Eleaner River in the southern part of Kangaroo Island. Most probably this is not the original habitat of the species. Almost all Gibbidessus inhabit more seasonal, open wetlands, overgrown with sedges and rushes.
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.