Malthininae Kiesenwetter, 1852
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publication ID |
https://doi.org/ 10.59893/bjc.23(2).009 |
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persistent identifier |
https://treatment.plazi.org/id/038C9D1E-0462-FFDC-FD10-FDD382BD7770 |
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treatment provided by |
Felipe |
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scientific name |
Malthininae Kiesenwetter |
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Subfamily Malthininae Kiesenwetter ,
1852
Tribe Malthinini Kiesenwetter, 1852
Genus Malthinus Latreille, 1806
† Malthinus (Malthinus)amicitiae sp. nov.
( Fig. 2 View Fig )
Holotype. Baltic amber, collection Fanti, access code BaA09RU (BaA = Baltic amber; 09 = sequential number; RU = Russia).
Type locality. Yantarny mine, Kaliningrad region, Russia.
Type horizon. Middle Eocene: Lutetian (47.8–41.2 Mya) to late Eocene: Priabonian (37.8–33.9 Mya).
Differential diagnosis. The new species is easily recognizable by its neck gradually
235 constricted posteriorly. It is similar only to the extinct M. danieli Kuśka & Kania, 2010 , from which it differs in the pronotum not narrower anteriorly, the elytra without impressed punctuation and the different colour ( Kuśka & Kania 2010). The other fossil Malthinus species show head strongly restricted behind eyes and dotted elytra ( Fanti & Damgaard 2018; Pankowski & Fanti 2022).
Description. Female, adult, robust, winged. Body length: about 6.0- 6.2 mm. Entirely blackish.
Head almost completely exposed, neck gradually constricted posteriorly, equipped with several long setae and impressed small punctation. Eyes large, convex, rounded, inserted in the lateral-upper part of head. Mandibles falciform. Maxillary palps 4- segmented; last palpomere globularelongated and apically pointed. Labial palps 3-segmented; last palpomere globular and apically pointed.
Antennae 11-segmented, filiform, relatively short, surpassing the elytral half, covered with several setae; scape elongated, club-shaped; antennomere II short; antennomeres III-IV sub-equal, elongated, rather robust; antennomeres V-VII sub-equal, slightly longer than previous ones; antennomere VIII longer and thinner than previous ones; antennomeres IX-X sub-equal, shorter and very slightly sturdier than previous one; antennomere XI elongated, rounded at apex.
Pronotum rectangular, slightly longer than wide, slightly narrower than head; apical margin very slightly rounded and not bordered; anterior corners rounded; sides straight and strongly bordered; basal margin straight and strongly bordered; posterior corners almost acute; surface irregular, gibbous on the basal part and concave near the apical margin, equipped with some long setae, without punctation. Scutellum triangular, wide at base, pointed apically, with rounded apex.
236 Elytra not particularly short, revealing the last abdominal segment uncovered, slightly wider than pronotum, parallel-sided, not dehiscent, rounded at apex; surface rather wrinkled, covered with several long setae and without punctation. Hind wings as long as elytra.
Metasternum with slightly rounded posterior margin, covered with dispersed short setae and very shallow punctation. Sternites transverse, wide, pubescent. Last tergite and last sternite wide and rounded. Legs robust, pubescent; coxae elongated, stout, enlarged at base; trochanters elongated, rounded at apex; femora enlarged, curved in the middle; tibiae cylindrical and thin, equipped with an apical spur, protibiae shorter than profemora, meso- and metatibiae longer than meso- and metafemora.
Tarsi 5-segmented, pubescent; tarsomere I elongated; tarsomere II about 1.4 times shorter than tarsomere I; tarsomere III shorter than previous one; tarsomere IV bilobed; tarsomere V short, thin, curved; claws simple, robust, without tooth.
Etymology. The specific epithet derives from the Latin noun “ ămīcĭtĭa ” = friendship, in reference to the friendship that binds the two co-authors.
Syninclusions. Botanical fragments, air bubbles, stellate hair.
Remarks. The oblong yellow amber piece measures approximately 30x20x 9 mm. The inclusion is complete and clearly visible on one side, while it has shows some oxidations on the other one.
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.