Research Article |
Corresponding author: Yuri A. Popov ( popovpin@gmail.com ) Academic editor: Thomas Henry
© 2015 Aleksander Herczek, Yuri A. Popov.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Herczek A, Popov YA (2015) An unusual new species of Hallodapomimus Herczek, 2000 from the Eocene Baltic amber (Hemiptera, Heteroptera, Miridae, Phylinae). ZooKeys 489: 25-32. https://doi.org/10.3897/zookeys.489.8886
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Hallodapomimus antennatus sp. n. (Hemiptera: Heteroptera, Miridae, Phylinae, Hallodapini) is described from a macropterous female found in Eocene Baltic amber. The new species can be recognized readily from the other species of the genus, mainly due to its unusual second antennal segment. A key for the identification of all known fossil Hallodapini is presented.
Heteroptera , Miridae , Phylinae , Hallodapini , Baltic amber
The present article is а continuation of a series of taxonomic papers on fossil plant bugs (Miridae) from Baltic amber (Prussian Eocene Formation). Miridae represent the largest family among true bugs (Hemiptera: Heteroptera), widespread all over the world, and with approximately 1500 genera and more than 11 000 described species, with potentially thousands more undescribed (
The recent Phylinae is one of the numerous subfamilies of mirids currently divided into six tribes, comprising more than 300 genera among which 50 genera belong to the tribe Hallodapini. Their representatives mainly occur temperate regions but there is also a large fauna in tropical and subtropical Asia (
Colour photographs and drawings were made with a Nikon Eclipse E 600 microscope and by the computer program NIS Elements, Ver. 4. 10. Body length was measured from the apex of head to the apex of fore wing; body width, across the maximal width; pronotum length, along midline; pronotum width, across the broadest part at its posterior angles; hemelytron length, from the base to the apex of anterior margin; hemelytron width, at maximal width of the hemelytron. All measurements are in millimeters (mm).
Hallodapomimus: Herczek 1998: 12, nomen nudum;
Hallodapomimus elektrinus Herczek, 2000: 145.
Distinguished from the other extinct hallodapine genus Leptomimoides by a combination of the following characters: smooth, impunctate dorsal surface of body, distinctive coloration (head, pronotum and part of cuneus dark, and clavus partly black), head almost twice as broad as long, pronotum 1.2–1.3 times wider than long; pronotal calli visible.
Holotype: female, Baltic amber, PIN RAS 964/1310; light yellowish middle-sized piece of amber (28 × 12 mm) of irregular shape. One dipteran syninclusion. The holotype is deposited in the collection of the Borissyak Paleontological Institute Russian Academy of Sciences (Arthropod Laboratory), Moscow.
Readily recognized among the other species of Hallodapomimus by its unusual flattened and widened second antennal segment, presence of two cavities on the vertex, a small scutellum (except H. succinus), and a large mesoscutum.
Female. Macropterous. Body length up to 7 mm, 2.8 times as long as wide. Dorsal surface almost smooth, impunctate. Ground colour light brown, almost yellow; mesoscutum and scutellum brown, hemelytra with one pale transverse fascia just posterior to scutellum, apical part of cuneus dark; hemelytral membrane dark, hyaline, slightly crumpled (Figs
Measurements. Body length 7.0 mm, width 2.5; length of head 0.65, width 1.5; width of eye (from above) 0.65; width of vertex 0.5; length of antennal segments = 0.75: 3.65: 1.8: 0.95 (7.15 mm); length of rostral segments I: II: III: IV = 0.74: 1.17: 0.44: 0.6; length of pronotum 1.24, anterior width (collar) 0.85, posterior width 1.7; thickness of collar 0.18; length of hemelytron 4.79, width 1.16; proportion of hemelytron, corium and length of cuneus: 4.8–2.9–1.0; length of mesoscutum 0.2 (mid line 0.2), width 0.6; length of scutellum 0.4; claval commissure 1.3; hind leg: length of femora 3.0, tibia 4.2, tarsus 1.38 (0.59:0.35:0.44).
The species epithet (Latin “antennatus”) refers to the unusual flattened and widened the second antennal segment.
1 | Body strongly elongate, more than 4 times as long as wide; dorsum of surface rippled. Head slightly more than 1.5 times as broad as long. Pronotum length and width subequal; pronotal calli indistinct. Head, pronotum and cuneus pale | Leptomimoides jonasdamzeni Herczek & Popov |
– | Body less than 4 times as long as wide; dorsum smooth, impunctate. Head almost twice as broad as long. Pronotum 1.2–1.3 times wider than long; calli weakly developed. Head, pronotum and part of cuneus dark | 2 |
2 | Second antennal segment flattened and considerably widened to apex, more than two times longer than 3rd; vertex with two slightly concave cavities; scutellum small, only twice long as mesoscutum length and less that one-third length of claval commissure | Hallodapomimus antennatus sp. n. |
– | Second antennal segment more slender, not expanded apically; less than twice as long as 3rd; vertex without cavities; scutellum large, ca. one-half length of claval commissure | 3 |
3 | Mesoscutum large, slightly more than one-half as long as scutellum; first tarsal segment of hind leg longest, second segment shortest | Hallodapomimus succinus Herczek |
– | Mesoscutum small, one-fifth as long as scutellum; first and third tarsal segments of hind legs longest and almost equal in size | 4 |
4 | Pronotal collar less narrow, thickness not less than 0.15 mm; cuneus less that one-fourth length of corium; all pairs of legs almost wholly bare | Hallodapomimus elektrinus Herczek |
– | Pronotal collar more narrow, thickness 0.1 mm; cuneus ca. one-third length of corium; all pairs of legs are covered with very short, dense, adpressed setae | Hallodapomimus krzeminskiorum Herczek & Popov |
The authors are grateful to Jonas Damzen (Vilnius, Lithuania) for making this specimen available for study and for his kind decision to donate the holotype Hallodapomimus antennatus sp. n. at the Arthropod Laboratory’s (Borissyak Paleontological Institue, Russian Academy of Sciences, Moscow, Russia) research collection. We also thank Marzena Zmarzly (Katowice, Poland) for the excellent drawing and photos. Many thanks to Katrina Menard (University of Oklahoma, USA) for kindly making available her latest publications on the Phylinae. Special thanks two the anonymous reviewers for reviewing the manuscript and providing very helpful comments and suggestions and linguistic improvements.