Crossotarsus emorsus Beeson, 1937

Lai, Shengchang, Zhang, Ling, Li, You & Wang, Jianguo, 2021, A new species, a new combination, and a new record of Crossotarsus Chapuis, 1865 (Coleoptera, Curculionidae, Platypodinae) from China, ZooKeys 1028, pp. 69-83 : 69

publication ID	https://dx.doi.org/10.3897/zookeys.1028.61018
publication LSID	lsid:zoobank.org:pub:3279FAE9-E002-4142-930F-96DF49B9E959
persistent identifier	https://treatment.plazi.org/id/799EF04F-6B6F-5A16-BC37-64B93E0C03F1
treatment provided by	ZooKeys by Pensoft (2021-04-07 14:02:16, last updated 2024-11-28 20:57:38)
scientific name	Crossotarsus emorsus Beeson, 1937
status

Treatment

Crossotarsus emorsus Beeson, 1937 View in CoL Figures 5 View Figure 5 , 6 View Figure 6

Crossotarsus emorsus Beeson, 1937: 87.

Material examined.

4 males, 1 female (JXAU) China: Yunnan Province, Xishuangbanna Dai Autonomous Prefecture, Jinghong City, Nabanhe River Watershed National Nature Reserve , Guomenshan , ca 1030 m, 22°14'46"N, 100°36'10"E, 27.I.2018, log dissection, host Dalbergia assamica , Shengchang Lai leg. GoogleMaps ; 1 male, 1 female (RAB); 1 male (JXAU) China: Yunnan Province, Xishuangbanna Dai Autonomous Prefecture, Jinghong City, Damanmi Village , ca 580 m, 22°02'50"N, 100°48'27"E, 20.I.2018, log dissection, host Cassia siamea , Shengchang Lai leg. GoogleMaps

Diagnosis.

C. emorsus is similar to C. terminatus but can be distinguished using the characters given in Table 3 View Table 3 .

Distribution.

Myanmar, Thailand, Laos ( Beaver and Liu 2013; Beaver 2016). New to China (Yunnan).

Host.

The species is recorded from trees in the families Lecythidaceae , Fabaceae , Sterculiaceae and Verbenaceae ( Beeson 1937), and is presumably polyphagous ( Beaver 2016). Host plants recorded here are: Senna siamea (Lam.) H.S.Irwin & Barneby and Dalbergia assamica Benth. ( Fabaceae ).

Molecular data.

The phylogenetic tree for analyzing the evolutionary relationships of 13 taxa including the ingroups ( Crossotarsus species) and the outgroups ( P. contaminatus ) was constructed based on four genes (Fig. 7 View Figure 7 ). The BI tree shows the new species ( C. beaveri ) and the new combination ( C. brevis ) forming a clade, with high node support. These group with Schedl’s (1972a) ' Crossotarsi coleoptrati ' ( C. fractus Sampson, 1912, C. squamulatus and C. terminatus ) and cluster with all remaining Crossotarsus species. It confirms that the taxonomic changes and the relationship of C. brevis and C. brevis are correct. It also indicates that C. emorsus , C. fractus , C. squamulatus and C. terminatus should be considered distinct species (as by Beaver and Liu 2013), and not considered synonyms or subspecies ( Schedl 1972a).

References

Beaver, RA, Liu, LY, 2013. A synopsis of the pin-hole borers of Thailand (Coleoptera: Curculionidae: Platypodinae). Zootaxa 3646 (4): 447 - 486, DOI: https://doi.org/10.11646/zootaxa.3646.4.7

Beaver, RA, 2016. The platypodine ambrosia beetles of Laos (Coleoptera: Curculionidae: Platypodinae). Entomologica Basiliensia et Collectionis Frey 35: 487 - 504

Beeson, CFC, 1937. New Crossotarsus (Platypodidae, Col.). The Indian Forest Records 3: 47 - 103

Schedl, KE, 1972a. Monographie der Familie PlatypodidaeColeoptera. W. Junk, Den Haag

Figures

Figure 5. Male of Crossotarsus emorsus Beeson A dorsal view B head C lateral view D declivity. Scale bars: 0.5 mm.

Figure 6. Female of Crossotarsus emorsus Beeson A dorsal view B head C lateral view D declivity. Scale bars: 0.5 mm.

Figure 7. Tree topology resulting from Bayesian analysis of four genes. Posterior probabilities are given on the nodes. New species and new combination in boldface.