Trichopsenius huaxiensis Jiang, Huang & Chen, 2023
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publication ID |
https://dx.doi.org/10.3897/zookeys.1152.99290 |
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publication LSID |
lsid:zoobank.org:pub:D9FCAD65-F187-4AC9-BA80-C99B30067B31 |
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persistent identifier |
https://treatment.plazi.org/id/0D6CAF2E-7348-4216-85D5-88B47E9D920A |
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taxon LSID |
lsid:zoobank.org:act:0D6CAF2E-7348-4216-85D5-88B47E9D920A |
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treatment provided by |
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scientific name |
Trichopsenius huaxiensis Jiang, Huang & Chen |
| status |
sp. nov. |
Trichopsenius huaxiensis Jiang, Huang & Chen sp. nov.
Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3
Type material.
(10 exs: 7 ♂♂, 3 ♀♀): Holotype: China: ♂, labeled 'China: Guizhou, Guiyang City (贵阳市), Huaxi District (花溪区), South Campus of Guizhou University (贵州大学南校区), Songlinpo (松林坡), 26°25'40"N, 106°40'06"E, H: 1105 m, 22.XI.2022, Jiang Ri-Xin leg.' (GUGC). Paratypes: 6 ♂♂, 1 ♀, with same label data as the holotype (GUGC); 2 ♀♀, with same label data as the holotype, except '23.XI.2022, Jiang Ri-Xin & Huang Xiu-Dong leg.' (GUGC).
Diagnosis.
Body reddish brown with elytra and lateral lobe of tergite IX darker. Pronotum transverse with anterior margin M-shaped at middle. Surface of visible sternites and tergites finely covered with short setae and modified with a row of long setae at posterior margin. Median lobe of aedeagus with apical lobe knife shaped; left paramere with apical lobe thin and strongly sinuous; right paramere with apical lobe curved and weakly sinuous, with a thin seta at base.
Trichopsenius huaxiensis sp. nov. is most similar with T. crassicornis Naomi & Terayama, 1996; they share similar habitus characters, such as the sinuated anterior margin of the pronotum and the form of the antennomeres. The new species can be adequately distinguished from T. crassicornis by the following characters: 1) anterior margin of the head weakly curved (cf. straight in T. crassicornis ); 2) median lobe of the aedeagus hemispherical at the base, apex without setae (cf. median lobe bulbous at base, apex with a short setae in T. crassicornis ); and 3) apical lobe of the parameres much shorter, about 1/2 length of basal lobe in the right paramere, about 1/3 length of basal lobe in the left paramere (cf. apical lobe more than half length of basal lobe in both right and left parameres in T. crassicornis ).
Description.
Male. Body (Fig. 1 View Figure 1 ) glossy, reddish brown with elytra and lateral lobe of tergite IX slightly darker.
Head (Fig. 2A View Figure 2 ) transverse, widest across eyes, surface glossy, covered with sparse thin punctures, with a pair of long setae between eyes, and a pair of long setae located at middle of anterior margin. Antenna (Fig. 2C View Figure 2 ) 11-articled, antennomeres 1-3 shiny, only bearing sparse long setae, antennomere 4 covered with sparse long setae and several short setae, other antennomeres covered with dense short setae and sparse long setae. Antennomere 1 longer than wide, distinctly expanded at apical 1/2; antennomere 2 longer than wide, narrower than antennomere 1, expanded near middle; antennomere 3 slightly shorter than antennomere 2, longer than wide, widest near apex; antennomeres 4 and 5 similar in form, slightly longer that wide; antennomeres 6-10 similar, about as long as wide, near trapezoidal; antennomere 11 with apex moderately pointed, about 1.5 times as long as wide, widest at basal 2/5. Mandibles (Fig. 2A View Figure 2 ) simple and aduncous, apex cuspidal. Maxillary palpomere 3 (Fig. 2A View Figure 2 ) about twice as long as wide, palpomere 4 small and subulate.
Pronotum (Figs 1 View Figure 1 , 2F View Figure 2 ) transverse, about 1.5 times as wide as long, widest around posterolateral corners, surface covered with sparse long setae and thin and shallow punctures. Anterior margin protruded, M-shaped at middle, with three pairs of long setae (Fig. 2F, s1-s3 View Figure 2 ) present subapically. Lateral margins finely curved, with several long setae. Posterior margin near straight, slightly concaved at middle, with two pairs of long setae. Disc of pronotum with four pairs of long setae, three pairs (Fig. 2F, s4-s6 View Figure 2 ) located near median line, one pair (Fig. 2F, s7 View Figure 2 ) located near lateral margin.
Elytron (Fig. 2B View Figure 2 ) longer than wide, with lateral margin near straight, and curved at posterior part, posterior margin curved. Surface of elytron finely covered with large punctures, each puncture bearing long setae.
Meso- and metaventrites (Fig. 2E View Figure 2 ) covered with several short setae and pores laterally. Surface of mesoventrite modified with thin polygonal microsculpture, mesocoxae almost contiguous. Surface of metaventrite covered with thin and longitudinal microsculpture; median sulcus longitudinal and thin, extending from posterior margin to near anterior margin; metaventral plate sparsely covered with minute pores; hind trochanter large and near ovate, surface covered with sparse minute pores.
Legs (Fig. 2D-E View Figure 2 ) simple, surface finely covered with short setae. Outer margins of tibiae covered with long setae, setae on inner margins much shorter than on out margin, and only present in apical half. Apex of tibiae with several spurs, two of them long and strong, others shorter and thinner. Surface of tarsus densely covered with long setae. Front tarsaomere 1 (Fig. 2D View Figure 2 ) slightly expended near apex, about as long as sum of length of tarsomeres 2 and 3; tarsomeres 2-4 similar in form, short; tarsomere 5 elongate, about as long as sum of tarsomeres 2-4. Middle tarsomere 1 (Fig. 2E View Figure 2 ) elongate, slightly shorter than sum of other four tarsomeres; tarsaomeres 2-4 similar in form, tarsaomere 2 longer than tarsaomeres 3 and 4; tarsaomere 5 elongate, shorter than sum of length of tarsaomeres 2-4. Hind tarsomere 1 strongly elongate, longer than sum of other four members; tarsomere 2 shorter than sum of tarsomeres 3-4; tarsomere 3 slightly longer than tarsomere 4; tarsomere 4 shortest; tarsomere 5 about as long as sum of length of tarsomeres 2-3.
Abdomen (Fig. 1A View Figure 1 ) gradually narrowed posteriorly, surface finely covered with short setae, all visible sternites and tergites modified with a row of long setae at posterior margin. Tergite VIII (Fig. 3A View Figure 3 ) about as long as wide, disc with several small pores and without setae, posterior margin rounded, margined by a row of long setae. Sternite VIII (Fig. 3B View Figure 3 ) longer than wide, disc with sparse small pores, without setae, posterior margin V-sharped, rounded at middle and margined by a row of long setae. Tergite IX (Fig. 3E View Figure 3 ) cylindrical, lobes long and slender, sparsely covered with setae of different lengths on posterior half; struts thin and long, finely curved, both ends narrower than middle part. Tergite X (Fig. 3E View Figure 3 ) membranous, inverted triangular, slightly concaved at middle of posterior margin. Sternite IX (Fig. 3E View Figure 3 ) rhombic, with middle of posterior margin with several short setae.
Median lobe of aedeagus (Fig. 3G, H View Figure 3 ) with basal capsule longer than apical lobe; apical lobe knife shaped, with apex slightly expended, apex with a small zonal sclerite. Parameres (Fig. 3I, J View Figure 3 ) large, longer than median lobe, asymmetric. Left paramere (Fig. 3J View Figure 3 ) with apical lob shorter than in right paramere, thin and strongly sinuous, apex acute. Right paramere (Fig. 3I View Figure 3 ) with apical lobe curved and weakly sinuous, with a thin seta at base, apex acute.
Measurements: BL: 1.99-2.10 mm; HL: 0.30-0.35 mm, HW: 0.51-0.53 mm; PL: 0.38-0.40 mm, PW: 0.55-0.59 mm; EL: 0.41-0.44 mm; EW: 0.75-0.81 mm; AL: 1.20-1.26 mm.
Female (Fig. 3C, D, F, K View Figure 3 ), externally similar with male in habitus. Tergite VIII (Fig. 3C View Figure 3 ) transverse, disc with several small pores and sparsely covered with short setae; posterior margin curved with an apical rounded extension at middle, margined by a row of long setae. Sternite VIII (Fig. 3D View Figure 3 ) generally similar with tergite VIII in form, posterior margin with only several long setae. Tergite IX (Fig. 3F View Figure 3 ) cylindrical, lobes long and slender, sparsely covered with setae of different lengths on posterior half. Tergite X (Fig. 3F View Figure 3 ) membranous, inverted trapezoidal, slightly concaved at middle of posterior margin. Sternite IX (Fig. 3F View Figure 3 ) rhombic, with posterior margin rounded. Spermatheca (Fig. 3K View Figure 3 ) with apical and basal part near perpendicular to each other, basal part narrower than apical part, distinctly sinuated, apical part near straight, with apical expanded and round.
Measurements: BL: 1.98-2.10 mm; HL: 0.30-0.33 mm, HW: 0.50-0.55 mm; PL: 0.39-0.41 mm, PW: 0.55-0.58 mm; EL: 0.40-0.44 mm; EW: 0.78-0.82 mm; AL: 1.19-1.25 mm.
Distribution.
China (Guizhou).
Symbiotic host.
Reticulitermes sp. ( Rhinotermitidae , Fig. 4 View Figure 4 ).
Etymology.
The species is named after its type locality, Huaxi District (Guiyang City, Guizhou, China).
Biological notes.
All adults of the new species were collected in November 2022, they were found in a dead and flattened pine tree where host termites were living (Fig. 5 View Figure 5 ). There were obvious communications between the new species and its host termites after laboratory observation, including antennal touch at least. No attack behavior from their host termites was observed.
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