Horaeomorphus hainanicus D.-Y. Zhou & S.-J. Zhang
publication ID |
https://dx.doi.org/10.3897/zookeys.572.7474 |
publication LSID |
lsid:zoobank.org:pub:2427CCB8-B274-4D96-83DE-391125C5F8BC |
persistent identifier |
https://treatment.plazi.org/id/754810B2-86FD-4684-8B7C-A4981F223105 |
taxon LSID |
lsid:zoobank.org:act:754810B2-86FD-4684-8B7C-A4981F223105 |
treatment provided by |
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scientific name |
Horaeomorphus hainanicus D.-Y. Zhou & S.-J. Zhang |
status |
sp. n. |
Taxon classification Animalia Coleoptera Staphylinidae
Horaeomorphus hainanicus D.-Y. Zhou & S.-J. Zhang View in CoL sp. n. Figs 2, 4
Type material
(20 ♂♂, 25 ♀♀). Holotype: CHINA: ♂, labeled 'China: Hainan, Ledong Hsien [乐东县], Jianfengling [尖峰岭] N.R., Mingfenggu [鸣凤谷], 18°44'30"N, 108°50'29"E, rainforest, decaying log from a colony termite nest, 995 m, 23.i.2015, Peng, Yin, Tu, Song, Shen, Zhou, Yan, Wang leg.'. Paratypes: 7 ♂♂, 14 ♀♀, same locality as holotype; 1 ♀, same locality as holotype, except 'alt. 950m, 30-IV-2012, PAN Y.H. & LI W. R. leg.'; 6 ♂♂, 7 ♀♀, labeled 'China: Hainan, Qiongzhong Hsien [琼州县], Limu Mt [黎母山], nr. residence, path to peak, 19°10'04"N, 109°44'45"E, decaying log, 1000 m, 31.i.2015, Peng, Yin,Tu, Song, Shen, Zhou, Yan, Wang leg.'; 2 ♂♂, 1 ♀, same locality as previously except ‘01.ii.2015’; 1 ♂, 1 ♀, same locality as previously except 'nr. residence, 19°10'04"N, 109°44'45"E, decaying log, 625m, 29.i.2015'; 1 ♂, same locality as previously except 'path to Limu Temple, 19°08'09"N, 109°45'46"E, 580-760m, 29.i.2015, Peng, Yin, Tu, Song, Shen leg.'; 2 ♂♂, 1♀, labeled 'China: Hainan, Wuzhi Shan [五指山] N. R., nr.reservoir, 18°53'10"N, 109°36'11"E, 500m, 22.iv.2012, leaf litter, sifted, Peng& Dai leg.'.
Diagnosis.
Horaeomorphus hainanicus can be readily separated from all other congeners by its moderately large (2.53-3.08 mm) and elongate body, fine punctation on pronotal disc and elytra, rounded apices of metatrochanters in male, parameres each with 3-5 apical setae and two subapical setae, unique structure of endophallus and shape of spermatheca.
Description.
Male. BL 2.77-3.08 mm; body (Fig. 2A) large, strongly convex, reddish brown, legs and palpi slightly lighter. Head broadest at large, finely faceted and moderately convex eyes, HL 0.40-0.48 mm, HW 0.58-0.68 mm; tempora rounded and slightly shorter than eye in dorsal view; vertex strongly transverse and weakly convex, with pair of small but distinct pits located near posterior margins of supra-antennal tubercles; frons weakly convex; supra-antennal tubercles strongly raised. Punctation on vertex and frons fine and inconspicuous; setae moderately long, sparse. Antennae (Fig. 4A) short, AnL 1.21-1.24 mm, relative lengths of antennomeres: 1.0: 1.1: 1.7: 1.5: 1.4: 1.5: 1.2: 1.1: 1.2: 1.1: 2.2. Pronotum inversely subtrapezoidal, widest near anterior third, PL 0.87-0.94 mm, PWm 0.72-0.81 mm, PWb 0.52-0.58 mm; anterior margin rounded, sides narrowing toward base; hind angles obtuse and blunt; posterior collar delimited from disc by deep and narrow transverse groove connecting three small pits. Punctation on disc as fine as that on frons and vertex; dorsal surface glossy; setation moderately long. Elytra oval and elongate, moderately convex; widest near anterior third, narrowing toward apices. EL 1.50-1.66 mm, EW 0.92-1.04 mm, EI 1.59-1.63. Humeral calli distinct. Punctures more distinct than those on pronotum, sharply marked and separated by spaces 3 –4× as wide as puncture diameters; setation moderately dense. Hindwings fully developed. Metatrochanter (Fig. 4I) modified, with distal part protruded and recurved; as long as half of metafemur, apex rounded. Aedeagus (Fig. 4 B–D) elongate, AeL 0.53 mm; endophallus (Fig. 4 F–G) very complicated, with large bell-shaped central complex surrounded at each side by weakly sclerotized, elongate lateral structures; parameres (Fig. 4E) slender, longer than median lobe, each with 3-5 apical setae and two subapical setae.
Female. Similar to male, with slightly smaller body and unmodified metatrochanter. BL 2.53-2.85 mm, HL 0.39-0.42 mm, HW 0.57-0.62 mm, AnL 1.11-1.20 mm, relative lengths of antennomeres: 1.0: 1.1: 1.5: 1.4: 1.4: 1.3: 1.1: 1.1: 1.2: 1.2: 2.2. PL 0.76-0.88 mm, PWm 0.63-0.74 mm, PWb 0.49-0.54 mm; EL 1.39-1.54 mm, EW 0.84-0.97 mm, EI 1.58-1.64, spermatheca (Fig. 4H) ovoid, slightly elongate, SpL 0.12 mm.
Comments.
Horaeomorphus hainanicus is similar to many congeners (see comments at Horaeomorphus chinensis ), and has a similar endophallic structures and the shape of spermatheca as Horaeomorphus chinensis . The relatively larger body (2.77-3.08 mm in males), the pronotal and elytral surface glossy, protruded metatrochanters with rounded apices and subtle differences in the endophallus can be used to readily separate this species from Horaeomorphus chinensis .
Bionomics.
Specimens of the type series were collected from ant and termite nest material in rotten wood and under bark of standing rotten logs in rainforests of Hainan.
Distribution.
Southern China: Hainan.
Etymology.
The specific epithet refers to the province where the type locality of the new species lies.
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.
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