Tomicus Latreille, sp. n.
Key to the species of Tomicus Latreille No key to the six previously published species of Tomicus exists. The bark beetles killing trees in Yunnan, identified in the literature as T. piniperda, are clearly morphologically distinct from that taxon and are described as a new, seventh species below. Th...
| Main Authors: | , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2008
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| Subjects: | |
| Online Access: | https://doi.org/10.5281/zenodo.5657516 http://treatment.plazi.org/id/FB3B083C671AFF9FFF576F8BFA1CF85B |
| Summary: | Key to the species of Tomicus Latreille No key to the six previously published species of Tomicus exists. The bark beetles killing trees in Yunnan, identified in the literature as T. piniperda, are clearly morphologically distinct from that taxon and are described as a new, seventh species below. The following key to all seven species of the genus is based on specimens examined by us. Tomicus puellus and T. pilifer are rare in Western collections and nowhere well illustrated, and although we could study only a few specimens of these two species, they proved readily identifiable. Many characters used in the key vary intraspecifically and the extreme character states may overlap interspecifically; however, combinations of these characters reliably distinguish otherwise similar species. 1. Interstria 2 on declivity with rows of small granules , not impressed (weakly impressed in some T. minor ) (Fig. 1).2 - Interstria 2 devoid of granules , clearly impressed (Fig. 2). 4 2(1). Elytral vestiture consisting of longer, erect interstrial hairs (arising from granules) in uniseriate rows and shorter decumbent hairs (ground vestiture), erect hairs longer on declivity (Figs. 1 c, d). Elytral declivity with conspicuous interstrial tubercles in regular uniseriate rows. Larger species, length 3.1–5.2 mm. Normal hosts Pinus spp.3 - Elytral interstrial hairs and ground vestiture equally short, dense, confused , decumbent or nearly so , not longer on declivity (Figs. 1 a, b). Elytral interstriae strongly crenulate; interstrial tubercles large, transversely confluent, confused. Interstrial punctures confused on declivity, only slightly larger than strial punctures; interstrial tubercles inconspicuous on declivity. Smallest species, length 2.9–3.5 mm (ours 3.0–3.2). Maternal gallery monoramous, longitudinal. Distribution: Siberia, Russian Far East and Sakhalin Island. Normal hosts: Picea jezoensis , P. ajanensis , Abies holophylla, A. nephrolepis but also recorded from Pinus koraiensis. T. puellus (Reitter) 3(2). Interstrial ... |
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