Tonkinomeris huzhengkuni, Liu & Golovatch, 2020
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publication ID |
https://dx.doi.org/10.3897/zookeys.954.54694 |
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publication LSID |
lsid:zoobank.org:pub:3879B114-B403-4407-B7B0-ED5B8B826CC6 |
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persistent identifier |
https://treatment.plazi.org/id/41BF7A61-D9E7-4B81-9685-4D5AB8B7C071 |
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taxon LSID |
lsid:zoobank.org:act:41BF7A61-D9E7-4B81-9685-4D5AB8B7C071 |
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treatment provided by |
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scientific name |
Tonkinomeris huzhengkuni |
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sp. nov. |
Tonkinomeris huzhengkuni sp. nov. Figures 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3
Type material.
Holotype: ♂ (SCAU TY01), China, Guizhou Province, Tongren City, Jiangkou County, Baishuidong Scenic Area, 27.652873N, 108.795223E, 450 m a.s.l., 25.XI.2019, Zhengkun Hu leg. Paratype: 1 ♀ (SCAU TY02), same data as for holotype.
Name.
Honours Mr Huzhengkun, the collector and a millipede fan. A noun in genitive case.
Diagnosis.
Differs from T. napoensis Nguyen, Sierwald & Marek, 2019, the sole other species of the genus ( Nguyen et al. 2019), by the larger body size (> 11 mm vs 9.6 mm), the more numerous ommatidia (at least 6+1 vs 5+1), the glabrous, but caudomedially produced posterior margins of ♂ tergites 8-11 (vs unmodified in both sexes), the vivid, peculiar, sexually dimorphic colour pattern (vs even more vivid, but the same in both sexes), and some structural details of the telopods: the much higher central lobe and the much shorter horns of ♂ syncoxite 19 (vs the opposite), the shape and armament of both telopod pairs, the less strongly reduced, 4-segmented ♂ telopodites 17 (vs 2-segmented), etc. (see Discussion below).
Description.
Body length of holotype ♂ ca 12.5 mm, width of thoracic shield ca 8.0 mm (broadest), height of thoracic shield ca 4.2 mm (highest). Body length of paratype ♀, 11.2 mm, width of thoracic shield ca 7.1 mm (broadest), height of thoracic shield ca 4.0 mm (highest). Coloration (Fig. 1 View Figure 1 ): body rather uniformly blackish, but with slightly yellowish edges. Dorsal pattern marbled yellow-brownish: collum with a small, rounded, central spot anteriorly and a paramedian pair of larger, transversely ovoid, lateral spots (Fig. 1D View Figure 1 ); thoracic shield and tergites 3-11 each with a similar, but much larger pair of lateral spots and a yellowish, but slightly purplish, median, narrow, axial stripe. Anal shield (= pygidium) of ♂ without stripe (Figs 1F View Figure 1 , 2D View Figure 2 ), but ♀ with a distinct, yellowish, median, triangular spot near caudal margin (Fig. 1C View Figure 1 ). Head largely dark brown, only labrum and Tömösváry’s organ lighter, grey-yellowish. Antennomeres 3-6 brownish, slightly purplish, remaining antennomeres light yellow-brown. Venter and podomeres 1 and 2 entirely light grey-yellowish, remaining podomeres dark brown, slightly purplish (Fig. 1B, D View Figure 1 ).
Head: mandibles (Fig. 3B, C View Figure 3 ) equal in both sexes, each with a large external tooth and a smaller internal tooth, the latter with four cusps. Molar plate with a long membranous fringe and a groove. At least seven rows of pectinate lamellae and a scaly intermediate area. Gnathochilarium (Fig. 3A View Figure 3 ) equal in both sexes, unmodified, typical of Glomerida . Left and right eyes asymmetrical, with 9+1/10+1 (♂) (Fig. 2A View Figure 2 ) or 8+1/6+1 (♀) (Fig. 1B View Figure 1 ) ommatidia. Tömösváry’s organ transversely oval, ca 1.6 times wider than long (Fig. 2A View Figure 2 ). Lengths of antennomeres: 6>>3>4=5>1=2>7 (Fig. 1B, D View Figure 1 ). Antennomere 6 ca 2.6 times as long as high. Antennomere 8 with four small, apical, sensory cones.
Collum with two complete transverse striae (Fig. 1D View Figure 1 ). Thoracic shield with a narrow hyposchism extending past caudal tergal margin; about 12 or 13 superficial transverse striae laterally and dorsolaterally, but five or six confusedly arranged and incomplete. One or two starting below, one in front of schism, all others above schism, with three crossing the dorsum; mid-dorsal region with five additional, incomplete, broken, confused, mostly short striolae behind last regular stria (Fig. 1E View Figure 1 ). Tergites: surface smooth and shining, only paratergites with three or four short, incomplete, and superficial striae (Fig. 1E View Figure 1 ). Tergite 9 in ♂ drawn posteriad into a small, triangular, glabrous (non-dentate), median lobe (Fig. 2D View Figure 2 ), this being very week also in tergites 8, 10, and 11. Pygidium in both sexes uneven medially at caudal margin; in ♂ clearly impressed and concave centro-dorsally and with two very small, paramedian, flattened and rounded knobs (Figs 1D-F View Figure 1 , 2D View Figure 2 ), in ♀ only slightly flattened dorsocaudally (Fig. 1C View Figure 1 ).
Legs long and slender. All podomeres densely setose, setae mostly being short. Coxae 1-16 each with a short, well-rounded, spinigerous, apico-mesal projection, this being especially evident in coxae 1 and 2 (Fig. 2B, C View Figure 2 ). Coxae 4-21 each with a similar apico-lateral process. Tarsi 1-16 each with two irregular transverse rows of 7-8+7-8 dorsal spines and 9-12+9-12 ventral spines (Fig. 2B, C, E View Figure 2 ). Femur 9, 2.4 times, tarsus 6.5 times longer than wide (Fig. 2E View Figure 2 ).
Male sexual characters: gonopore small, oval, with a few short setae around (Fig. 2C View Figure 2 ). Legs 17 (Fig. 4A View Figure 4 ) strongly reduced, very densely micropilose throughout. Coxae membranous, contiguous, but clearly separated medially. Each coxa with a very large, rather regularly rounded, outer lobe and a small, rounded, distomedial, setigerous finger. Telopodite 4-segmented, telopoditomere 2 largest, subrectangular, about twice as long as telopoditomere 1 or telopoditomeres 3 and 4 combined. Anterior telopods (Fig. 4B, C View Figure 4 ) also very densely micropilose throughout. Syncoxite (=?coxosternum) membranous, on either side with a small rounded lobule at base of telopoditomere 1. Telopodite 4-segmented, with a spine apically. Telopoditomere 1 subrectangular, 1.2 times longer than wide. Telopoditomere 2 largest, a little swollen ventro-parabasally, its apico-mesal tooth on caudal face bulged at base, sharp apically and extending to basal 1/4 telopoditomere 3. The latter subtrapezoid, its apico-mesal tooth on caudal face small, rounded, projecting above base of a subcylindrical telopoditomere 4. Posterior telopods (Fig. 4D-G View Figure 4 ) particularly strongly incrassate, likewise very densely micropilose throughout. A large, high, thick, and roundish syncoxite placed on a large membranous sternite, with a high, roundish, median lobe closely flanked by two inconspicuous, short, spiniform, obliquely truncate, setose horns (Fig. 3G View Figure 3 ), each latter being much shorter than syncoxital lobe. Telopodite 4-segmented, with a spine apically. Telopoditomere 1 squarish, with a very small distomesal, setigerous cone (a strongly reduced trichostele). Telopoditomere 2 with a prominent, finger-shaped, distomesal process on caudal face, produced apically to ca 1/3 telopoditomere 3. The latter elongate, gently tapering distad and curved apically basad towards process on telopoditomere 2, with another, much smaller, caudad curved, caudolateral process. Telopoditomere 4 smallest, subcylindrical, erect, clearly shifted anteriad, subtended by and reaching the distal end of telopoditomere 3.
Vulva (Fig. 3D View Figure 3 ) densely setose, large, covering 1/2 coxa 2.
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.