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Ukrainian Journal of Ecology
Ukrainian Journal ofEcology, 2020, 10(2), 353-356, doi: 10.15421/2020_107
RESEARCH ARTICLE
A new species of the genus Basiliogeus Kuschel, 1994 (Insecta: Coleoptera: Nemonychidae) from Malaysia
A.A. Legalov1'2
1 Institute of Systematics and Ecology of Animals, Siberian Branch, Russian Academy of Sciences, Frunze Street, 11,
Novosibirsk 630091, Russia Tomsk State University, Lenina Prospekt 36, Tomsk, 634050, Russia
Corresponding author E-mail: fossilweevils@qmail. com Received: 26.02.2020. Accepted28.04.2020
A new species, Basiliogeus kurbatovi Legalov, sp. n. (Rhinorhynchinae: Rhinorhynchini) from Malaysia (Sabah) is described. The new species differs from B. dacrycarpi Kuschel et Riedel, 2011 from New Guinea in the body lacking metallic lustre, shorter rostrum, wider antennal club, yellow-brown femora and wider elytra. A distribution map of the species from the genus Basiliogeus is given. It is the first record of the family Nemonychidae from the Sunda Islands and in the Oriental Region.
Keywords: Insecta; Coleoptera; Curculionoidea; Rhinorhynchinae; new species; Kalimantan
Introduction
Nemonychidae is a small relict family of Curculionoidea (Kuschel, 1983; Gratshev, Legalov, 2014; Legalov, 2018). Seventy-five described species of the family were known in the modern fauna (Kuschel, 1954, 1959, 1989, 1993, 1994, 2003; Kuschel, May, 1997; Legalov, 2009, 2017; Kuschel, Leschen, 2011). The diversity centre is located in the southern hemisphere where host plants grow (Kuschel, Leschen, 2011). The maximum diversity of the group was in the Late Jurassic and Early Cretaceous (Martynov, 1926; Arnoldi, 1977; Zherikhin, 1986, 1993; Gratshev, Zherichin, 1995, 1996, 2000; Ren, 1995; Gratshev et al., 1997; Zherichin, Gratshev, 2003, 2004; Liu et al., 2006; Legalov, 2010a, 2010b; 2012, 2015; Oberprieler, Oberprieler, 2012;. Davis et a., 2013; Peris et al., 2014; Gratshev, Legalov, 2014; Legalov et al., 2017). The subfamily Rhinorhynchinae includes five tribes with 21 genera and 58 species (Kuschel, Leschen, 2011; Legalov, 2017, 2018). The earliest find was in the Barremian of China (Liu et al., 2006; Davis et a., 2013; Legalov, 2015). The genus Basiliogeus consist of six species distributed in Kalimantan, New Guinea and Australia (Figure 1). A new species of this genus from Kalimantan is described in this article.
Materials and Methods
The Holotype is deposited in the Zoological Institute of the Russian Academy of Science (Saint-Petersburg) - ZIN. Photographs were taken using the Leica and Zeiss Stemi 2000-C dissecting stereomicroscopes.
Results and Discussion
Family Nemonychidae
Subfamily Rhinorhynchinae
Tribe Rhinorhynchini
Genus Basiliogeus Kuschel, 1994
Basiliogeus kurbatovi Legalov, sp. n. Figures 2-6.
urn:lsid:zoobank.org:act:C08869E6-CE9C-4D21-9E8D-739EE278C436.
Etymology. In honor of the entomologist Sergey Alexandrovich Kurbatov (Moscow).
Description. Female. Body length (without rostrum) 2.2 mm. Rostrum length 0.6 mm. Body brown with sparse, light curved pale hairs, without metallic lustre; apex of rostrum, antennae and legs yellow-brown. Head weakly narrowed behind eye; labrum free, paucisetose, with three pairs of dorsal setae; mandible not exodontous; rostrum deeply saddled at base, long, curved, widened near apex, subequal to length of pronotum, 3.1 times as long as wide at apex and at base, 6.6 times as long as wide in middle, sparsely punctuate; eyes strongly convex and rounded; forehead flat and wide, 1.2 times as wide as rostrum at base, densely punctuate; temples short; vertex convex, punctuate; gular suture double; maxillary palpi quite long, 4-articled; 4th article considerably shorter than 1st antennomere; antennae long, inserted behind middle of rostrum, reaching middle of pronotum; 1st and 2nd antennomeres long-conical; 1st antennomere not reaching eye, 3.0 times as long as wide; 2nd antennomere subequal to 1st antennomere; 3rd-8th antennomeres conical; 3rd antennomere 2.1 times as long as wide, 0.6 times as long as and 0.9 times as narrow as 2nd antennomere; 4th antennomere 1.8 times as long as wide, 0.8 times as long as and subequal in wide to 3rd antennomere; 5th antennomere 1.8 times as long as wide, 1.2 times as long as and 1.2 times as wide as 4th antennomere; 6th antennomere 1.8 times as long as wide, 0.9 times as long as and subequal in wide to 5th antennomere; 7th antennomere 1.5 times as long as wide,
subequal in length and 1.2 times as wide as 6th antennomere; 8th antennomere 1.1 times as long as wide, 0.8 times as long as and 1.1 times as wide as 7th antennomere; club not compact, slightly shorter than funicle, formed from 9th to 11th antennomeres; 9th antennomere 1.1 times as long as wide, 1.9 times as long as and 1.8 times as wide as 8th antennomere; 10th antennomere subequal in length and width, 0.9 times as long as an equal in wide to 9th antennomere; 11th antennomere 1.7 times as long as wide, 1.5 times as long as and 0.9 times as narrow as 10th antennomere; pronotum somewhat bell-shaped, 1.3 times as long as
Figure 1. Distribution of the genus Basiliogeus. Octagon - B. kurbatovisp. n.; circle - B. dacrycarpiKuschel & Riedel, 2011; ring - B. sp.; triangle - B. striatopunctatus (Lea, 1926); rhombus - B. inops Kuschel, 2011; square - B. prasinus Kuschel, 1994.
wide at apex, subequal to wide in middle and 1.2 times as long as wide at base, without lateral carina; sides slightly rounded from apex to base; disk weakly convex, densely punctuate; intervals between points approximately equal to or slightly larger than diameter of points; scutellum almost triangular, 0.9 times as long as wide; elytra 1.9 times as long as wide at base, 1.6 times as long as wide in middle, 2.4 times as long as wide at apical fourth, 2.7 times as long as pronotum, with slightly flattened humeri; scutellar striole distinct; elytral striae distinct with quite small points; elytral intervals flattened, 1.0-2.0 times as wide as striae, with row of small points; epipleura distinct; apex of elytra rounded when together; precoxal portion of prosternum slightly elongated, 0.8 times as long as procoxal cavities, 2.3 times as long as postcoxal portion; postcoxal portion 0.3 times as long as procoxal cavities; procoxal cavities contiguous; metanepisternum densely punctate, approximately 5.4 times as long as wide in middle; mesocoxal cavities narrowly separated, closed; metaventrite weakly convex, quite coarsely punctate, 2.2 times as long as length of mesocoxal cavity; mesonotum punctate, with one stridulatory file; abdomen weakly convex; ventrites free; 1st ventrite slightly longer than length of metacoxal cavity; 2nd ventrite 0.9 times as long as length of 1st ventrite; 3rd ventrite 0.8 times as long as length of 2nd ventrite; 4th ventrite 0.8 times as long as length of 3rd ventrite; 5th ventrite 1.5 times as long as length of 4th ventrite; procoxae large, subconical; metacoxae transverse; trochanters small, not separating femora from coxae; femora thickened, lacking teeth. Profemora 3.1 times as long as wide; mesofemora 3,8 times as long as wide; metafemora 4.3 times as long as wide; tibiae almost straight, with two apical spurs, without mucro; protibiae 6.7 times as long as wide in at apex; mesotibiae 6.9 times as long as wide at apex; metatibiae 6.7 times as long as wide at apex; tarsi long, quite narrow. 1st tarsomere long-conical; 2nd tarsomere conical, slightly truncate-emarginate; 3rd tarsomere bilobed; 4th tarsomere small, longer than wide; 5th tarsomere elongated; claws free, strongly divergent, appendiculate; protarsi: 1st tarsomere 3.3 times as long as wide at base; 2nd tarsomere 1.3 times as long as wide at base, 0.7 times as long as and 1.7 times as wide as 1st tarsomere; 3rd tarsomere 0.7 times as long as wide, 0.8 times as long as and 1.5 times as wide as 2nd tarsomere; 5th tarsomere 2.1 times as long as wide at base, 1.2 times as long as and 0.4 times as narrow as 3rd tarsomere; metatarsi: 1st tarsomere 2.4 times as long as wide at base; 2nd tarsomere 1.2 times as long as wide at base, 0.7 times as long as and 1.4 times as wide as 1st tarsomere; 3rd tarsomere 0.6 times as long as wide, 0.8 times as long as and 1.6 times as wide as 2nd tarsomere; 5th tarsomere 3.3 times as long as wide at base, 1.9 times as long as and 0.4 times as narrow as 3rd tarsomere.
Material examined. Holotype, adult female, ZIN, "E Malaysia, Sabah, rd Kota - Kinabalu - Tambutan, km 52, 1600-1800 m, 2-5.VII.2002, Kurbatov & Zimina".
Comparison. The new species is similar to Basiliogeus dacrycarpi Kuschel et Riedel, 2011 from New Guinea but differs in the body lacking metallic lustre, shorter rostrum, wider antennal club, yellow-brown femora and wider elytra. Distribution. Malaysia (Sabah).
Figures 2-6. Baslliogeus kurbatovisp. n. 2- body, dorsal; 3 - body, ventral; 4 - apex of rostrum, dorsal; 5- body, lateral; 6-genitalia. Scale bar 1.0 mm for 1, 2, 5; 0.2 mm for 4, 6.
Discussion and Conclusion
The trophic links between the families Araucariaceae and Podocarpaceae and Nemonychidae are known. The larvae of Basiliogeus feed in Araucaria, Agathis, and Dacrycarpus (Kuschel, Leschen, 2011). Araucaria is absent on Kalimantan. Five species of Agathis and four species of Dacrycarpus grow on the island. I suggest the new species can be associated with one of the species of Agathis or Dacrycarpus. One can expect other new species of the genus Basiliogeus to be found on the plants in the region. This is the first record of the family Nemonychidae from the Sunda Islands and in the Oriental Region.
Acknowledgments
The author is grateful to Dr. S.A. Kurbatov (Russia) for providing related material, and Dr. George O. Poinar, Jr. (USA: Corvallis) for improving the manuscript. The study was supported by the Russian Foundation for Basic Research (project nos. 18-04-00243-a and 19-04-00465-a) and the Federal Fundamental Scientific Research Program for 2013-2020 (project no. AAAA-A16-116121410121-7).
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Citation:
Legalov, A.A. (2020). A new species of the genus Basiliogeus Kuschel, 1994 (Insecta: Coleoptera: Nemonychidae) from Malaysia. Ukrainian Journal of Ecology, 10(2), 353-356.
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