Xenostanus jiangkuni Li, Szawaryn & Cai, 2022
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publication ID |
https://dx.doi.org/10.3897/asp.80.e81736 |
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publication LSID |
lsid:zoobank.org:pub:48AB3E3B-3928-49CA-B26D-4B22839FA7D5 |
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persistent identifier |
https://treatment.plazi.org/id/DF781A4B-9A46-460E-AD27-BDC09BCB1958 |
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taxon LSID |
lsid:zoobank.org:act:DF781A4B-9A46-460E-AD27-BDC09BCB1958 |
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treatment provided by |
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scientific name |
Xenostanus jiangkuni Li, Szawaryn & Cai |
| status |
sp. nov. |
Xenostanus jiangkuni Li, Szawaryn & Cai sp. nov.
Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4 , 5, S1 View Figure 5
Etymology.
The species is named after Mr. Kun Jiang, who kindly donated many fossils for our research.
Type materials.
Holotype: NIGP177782. Two paratypes, GPIH no. 5058 (CCGG no. 11948), GPIH no. 5059 (CCGG no. 11105).
Type locality and horizon.
Amber mine located near Noije Bum Village, Tanai Township, Myitkyina District, Kachin State, Myanmar; unnamed horizon, mid-Cretaceous, Upper Albian to Lower Cenomanian.
Diagnosis.
As for the tribe.
Description.
Body elongate, widest at middle of elytra, very weakly convex. Surface with hair-like setae. - Head partially exposed and visible from above (Fig. 5F View Figure 5 ). Eyes coarsely faceted, without interfacetal setae (Fig. 3B,C View Figure 3 ). Frontoclypeal suture absent (Fig. 3B View Figure 3 ). Labrum free, transverse (Fig. 3B View Figure 3 ). Subantennal grooves absent. Antennae (Fig. 4C,D View Figure 4 ) with 10 antennomeres; scape distinctly longer and wider than pedicel; antennomeres 3-7 small, subquadrate to transverse; club (antennomeres 8-10) asymmetrical, as long as antennomeres 3-7 combined. Mandibles short (Fig. 3A View Figure 3 ). Maxillary palps (Fig. 3A View Figure 3 ) 3-segmented; apical palpomere about twice as long as penultimate one, conical. Labial palps (Fig. 3A View Figure 3 ) 2-segmented; apical palpomere about as long as basal one. Ventral head surface seemingly with a pair of parallel subgenal ridges (Figs 3A View Figure 3 , 5E View Figure 5 ). - Prothorax: Pronotal disc (Fig. 5F View Figure 5 ) widest at base; anterior margin straight; lateral margins bordered in posterior part; posterior angles pointed; posterior margin bisinuate. Prosternum (Figs 3A View Figure 3 , 5E View Figure 5 ) in front of coxae about as long as longitudinal coxal diameter, anteriorly not produced forward; prosternal carinae absent; prosternal process broad, widened beyond front coxae, meeting postcoxal hypomeral projections, truncate at apex. Procoxal cavities externally closed, ovaloid, without lateral slit (Fig. 5E View Figure 5 ). - Meso- and metathorax: Scutellar shield strongly transverse. Elytra covering entire abdomen except for part of pygidium (Fig. 1A View Figure 1 ). Mesoventrite flat, without transverse carina (Figs 1B View Figure 1 , 5A View Figure 5 ). Mesocoxal cavities circular, outwardly closed (Figs 1B View Figure 1 , 5A View Figure 5 ). Meso-metaventral junction nearly straight (though with a small projection medially). Metaventrite with distinct postcoxal lines (Figs 1B View Figure 1 , 2B View Figure 2 , 5A View Figure 5 ); discrimen visible in posterior third of metaventrite. Metacoxae transverse, broadly separated. - Legs: Femora flattened. Tibiae simple, not strongly widened, apically with small denticles; tibial spurs 2-2-2 (Fig. 3D View Figure 3 ). Tarsi 4-4-4 (Fig. 3D View Figure 3 ); tarsomeres 1 and 2 ventrally lobed; tarsomere 3 smaller and simple; tarsomere 4 elongate, as long as 1-3 combined. Pretarsal claws simple, with small basal angulation. - Abdomen with six freely articulated ventrites. Ventrite 1 longer than 2-4 combined, with strongly arcuate postcoxal lines (Figs 1B View Figure 1 , 2B View Figure 2 , 5A View Figure 5 ), anteriorly complete; intercoxal process very broad and truncate.
Measurements.
NIGP177782: BL 1.42 mm, BW 0.63 mm, HL 0.27 mm, HW 0.31 mm, PL 0.34 mm, PW 0.51 mm, EL 0.96 mm. GPIH no. 5058: BL 1.88 mm, BW 0.74 mm. GPIH no. 5059: BL 1.30 mm, BW 0.62 mm
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.