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Baba lapidea gen. and sp. nov., holotype (No 809), female imago. (5) Head and thorax in lateral view; (6) mesonotum in dorsal view; (7) left fore leg in lateral view. MNs – mesonotal suture, MLs – median longitudinal suture, MPs – medioparapsidal suture, LPs – lateroparapsidal suture. Scale bars = 1 mm.
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The female imago specimen belonging to a new species Baba lapidea gen . and sp. nov . and a new family Babidae fam. nov . from Eocene Baltic amber is described and illustrated. This insects combines characters common with Fimbriatotergaliae (on fore wing MP 2 and CuA curved near base; on hind wing MA lacks triad; first tarsal segment shortened and...
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The Siphloplecton jaegeri species group is established here for three extinct species, namely for the earlier described Siphloplecton jaegeri Demoulin, 1968, and for two new species from Eocene Baltic amber, Siphloplecton landolti sp. nov. and Siphloplecton studemannae sp. nov. Based on the well-preserved specimens of these species, a diagnosis is...
In a first step to revise the fossil species of the mayfly family Metretopodidae, a historical overview and redescription of the type specimens of all hitherto described fossil species is given. All preserved specimens of Siphloplecton macrops (PICTET-BARABAN & HAGEN, 1856), S. jaegeri DEMOULIN, 1968, Siphloplecton spp., Metretopus? henningseni DEM...
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Citations
... New insect families from Baltic amber were established in different orders. At least fifteen insect families are known: Protoxenidae in Strepsiptera (Pohl et al. 2005), Weitschatidae in Hemiptera (Koteja 2008), Ogmomyidae in Trichoptera (Wichard 2013), Elektraphididae in Homoptera, Catastylidae and Palpigeridae in Collembola (according to Zherikhin 1970), Babidae in Ephemeroptera (Kluge et al. 2006), Yantarocentridae in Trichoptera (Ivanov & Melnitsky 2016), Hoffeinsmyiidae in Diptera (Michelsen 2009), and Paleomelittidae (Engel 2001), Pelecinopteridae (Zherikhin 1970), and Electrotomidae (Rasnitsyn 1977) in Hymenoptera. Three new coleopteran families were described based on the material from Baltic amber: (1) Berendtimiridae, a family with the monotypic genus Berendtimirus Winkler, 1987; (2) Electrapatidae, at present considered to be of the tribe Electrapatini Iablokoff-Khnzorian, 1962, belonging to the family Schizopodidae LeConte, 1859; (3) Circaeidae Iablokoff-Khnzorian, 1961, currently within Aderidae Csiki, 1909 In the present paper the description of a new enigmatic taxon of beetles discovered in Baltic amber is provided. ...
An unknown peculiar beetle from Tertiary Baltic amber, Wabbel cerebricavus gen. et sp.
nov. designated to a new family, is described and illustrated. The new family, Wabbelidae
fam. nov., is diagnosed and assigned to the superfamily Cucujoidea. The new family can be
identified by the thick moniliform antennae, modified (deeply concave) frons and vertex,
longitudinally strigose pronotum with pair of basal grooves, wide gula with complete gular
sutures, pentamerous non-lobed tarsi, seriate punctuation of elytra, and dorsally nonflattened
body.
... (Originally described in Palaeoanthidae, McCafferty 1997 placed the genus in Australiphemeridae. While this attribution is not certain [see Kluge et al. 2006], it is followed in McCafferty and Santiago-Blay 2009 and here.) F. Babidae Kluge et al., 2006 Eoc.(Priabonian) ...
A new fossil species of mayfly of the genus Cloeon Leach, 1815 (Ephemeroptera, Baetidae) is described. The type material comprises female imagines from 24 amber inclusions, from Miocene strata of Chiapas in southern Mexico. The fossil species, Cloeon tzeltal sp. nov., closely resembles those in the genus Cloeon by the following diagnostic characters: absence of hind wings; two major crossveins between R1 and R2 not in line with the crossveins below them; single marginal intercalaries; and basal crossveins between veins R and Rs situated more basally than the following vein. The new species can be distinguished from extant species of Cloeon by the absence of colored costal and subcostal fields in the forewings and the absence of transversal veins in vitta broadly bordered with white. Extant species of the genus Cloeon in America have an exclusive distribution in the northern part of the continent; with the exception of one introduced taxon, no valid species have been recorded in the tropics. As such, the fossil record of Cloeon in the southernmost part of North America suggests a broader geographic distribution of this genus in the geological past, including the southernmost part of North America.
Wiesław Krzemiński was born on 26 October 1948, in Oświęcim, south of Poland. In his youth he was an addicted book reader and developed his love for nature. After few years of playing in a big beat band he eventually focused on biology. Currently, he is a full time Professor and works in the Institute of Systematics and Evolution Polish Academy of Sciences in Kraków (ISEA PAS) and the Pedagogical University in Kraków.
A new monotypic family, †Yantaromyiidae (Insecta, Diptera, Schizophora), is described from Baltic amber. Yantaromyia arcana gen. et sp. nov. is represented by a single well-preserved male. X-ray synchrotron microtomography is used to reveal details of its morphology. The new family is a schizophoran fly, placed here close to Heleomyzidae + Trixoscelididae + Rhinotoridae, and is erected on the basis of the following combination of (supposed) apomorphies with respect to Schizophora: lunule enlarged and bare, male eyes dichoptic, male abdominal segments 6–8 fused and secondarily almost symmetrical, legs strongly setose, tibiae with two preapical setae dorsally, subscutellum strongly convex, thoracic suture perpendicular to the longitudinal body axis and reaching row of dorsocentrals. Additional characters include: inclinate frontal setae absent, postocellars convergent, frontal vitta setulose, postsutural intraalar absent, anepisternum without strong setae, anepimeron bare, both proepisternal and proepimeral setae present. Microtomography revealed that some cuticular remains are present, displaced and, if occasionally occurring close to the body surface, visible as false pits.
http://zoobank.org/urn:lsid:zoobank.org:pub:6C6EF7FF-74CF-4775-A433-B2E850015B74
Introduction Günter Bechly Insects are by far the most diverse group of multicellular organisms on our planet. Of about 1,625,000 described species of prokaryotes, protoctists, fungi, plants and animals, more than 1 million is represented by arthropods, of which insects constitute the largest group with about 854,000 described species. The estimations of the number of still undescribed species, especially in the vanishing tropical rainforests, are ranging from 2 million to 80 million species! The most species-rich groups within insects are the holometabolous orders Coleoptera (beetles), Hymenoptera (ants, wasps and bees), Diptera (mosquitoes and flies) and Lepidoptera (moths and butterflies). Among the hemimetabolous orders, which lack a pupal stage in their ontogenetic development, the Hemiptera (aphids, scale insects, cicadas and bugs) are the largest group, while all other insect orders have much fewer species. Even though relatively small animals, the extremely large number of individuals makes insects a very significant part of the total terrestrial biomass in many biotopes. For example, in tropical rainforests, the ants and termites have a higher total biomass than all the vertebrates combined. Insects are not only diverse in terms of species number and number of individuals, but also in their astonishing anatomical and ecological variability. Insects populate nearly every available habitat on the planet, except for the open seas and the frozen polar regions.
The first and last occurrences of hexapod families in the fossil record are compiled from publications up to end-2009. The major features of these data are compared with those of previous datasets (1993 and 1994). About a third of families (>400) are new to the fossil record since 1994, over half of the earlier, existing families have experienced changes in their known stratigraphic range and only about ten percent have unchanged ranges. Despite these significant additions to knowledge, the broad pattern of described richness through time remains similar, with described richness increasing steadily through geological history and a shift in dominant taxa, from Palaeoptera and Polyneoptera to Paraneoptera and Holometabola, after the Palaeozoic. However, after detrending, described richness is not well correlated with the earlier datasets, indicating significant changes in shorter-term patterns. There is reduced Palaeozoic richness, peaking at a different time, and a less pronounced Permian decline. A pronounced Triassic peak and decline is shown, and the plateau from the mid Early Cretaceous to the end of the period remains, albeit at substantially higher richness compared to earlier datasets. Origination and extinction rates are broadly similar to before, with a broad decline in both through time but episodic peaks, including end-Permian turnover. Origination more consistently exceeds extinction compared to previous datasets and exceptions are mainly in the Palaeozoic. These changes suggest that some inferences about causal mechanisms in insect macroevolution are likely to differ as well.
Three larval instars of Nearctic Agathidium angulare Mannerheim, 1852, are described in detail and the first and third stage larvae are figured for the first time; morphology of the stages was analyzed and compared, with special emphasis on measurements, chaetotaxy and porotaxy of head, mouthparts, thorax, abdomen, leg and urogomphi. Preliminary discussion on larval characters of the genus Agathidium is provided.
