Cretaceous Hitchhikers:a Possible Phoretic Association between a Pseudoscorpion and Bird in Burmese Amber

Objective Phoresy represents a non-parasitic association between animals of different taxa related to transportation. Members of several pseudoscorpion families are phoretic. In pseudoscorpions, phoresy may or may not be associated with their predatory behavior, enabling dispersal over larger distances than they could manage with their own short legs. This provides a wide distribution, and a potential food supply.

First Eggs of Fossil Bristletails (Meinertellidae： Microcoryphia) from Burmese Amber

Fossil microcoryphids are scarce. Silverstri （1912） described two genera and eight species of Machilidae or Machiloidae incertae sedis from Baltic amber （35-40 Myr）. In Cretaceous Myanmar amber （burmite： -99 Myr） one preserved Machilidae plus five undetermined specimens were reported but with no details by Grimaldi et al. （2002）. In Dominican amber （20-25 Myr） only Neomachilellus （Praeneomachilellus） dominicanus （Sturm ＆ Poinar 1997： Meinertellidae） has been found. Mendes （2013） considered that one undetermined Microcoryphia specimen preserved in burmite belonged to the genus Macropsontus, but did not provide enough argumentation.

Flat-footed Females and Missing Males:A New Genus and Species of Pleciofungivoridae(Diptera:Bibionomorpha)Represents the First Record of the Family from Mid-Cretaceous Kachin Amber

A new genus and species,Cretopleciofungivora simpsoni gen.et sp.nov.,from the extinct family Pleciofungivoridae(Diptera:Bibionomorpha),is discovered in mid-Cretaceous Kachin amber.Previously,this family was known only from imprints in sedimentary rocks of the Jurassic and the Lower Cretaceous.Discovery of a representative of Pleciofungivoridae in Kachin amber confirms the presence of the family in the Upper Cretaceous.The new species has a unique structure of fore tarsus,with lobed and extended tarsal segments Ⅱ to Ⅳ,a feature hitherto known only in a few species of extant Sciaroidea.Although not particularly rare,the new species is currently known only from female specimens.Possible reasons for this phenomenon,very unusual in Sciaroidea,are briefly discussed,including parthenogenesis as a potentially plausible hypothesis.

A new species of ice crawlers from Burmese amber(Insecta:Grylloblattodea)

Modem grylloblattids are one of the least diverse insect orders. The single extant family is contrasted with 46 families described from the fossil records, which extend to the Late Carboniferous. The most ancient grylloblattid nymphs are known from the Lower Permian. Till now, there is no report on grylloblattid from Burmese amber, which is a very old amber locality. Herein, we describe Sylvalitoralis cheni Zhang, Bai ＆ Yang, sp. nov. from Grylloblattina based on a nymph specimen from the mid-Cretaceous Myanmar （Burmese） amber.

Halteriomantispa grimaldii gen.et sp.nov.:A new genus and species of the family Dipteromantispidae(Insecta:Neuroptera)from the mid-Cretaceous amber of Myanmar

The family Dipteromantispidae, previously with only two genera and three species, is one of the enigmatic groups of the Cretaceous Neuroptera by the mantispid-like appearance combined with strongly reduced hind wings specialized into a haltere-like structure. A new genus and species of Dipteromantispidae, namely Halteriomantispa grimaldii gen. et sp. nov., is herein described based on an exquisitely preserved specimen from the mid-Cretaceous amber of northern Myanmar. It represents the first record of Dipteromantispidae from the amber deposit of mid-Cretaceous （Albian-Cenomanian） of Myanmar. A brief discussion on the homology of forewing venations and female genital sclerites of Dipteromantispidae is given.

Nomenclatural validation of new genera and species of the superfamily Psychopsoidea(Insecta:Neuroptera) from the mid-Cretaceous amber of Myanmar

Two new genus-group names and two new species-group names of the lacewing superfamily Psychopsoidea from the mid-Cretaceous amber of Myanmar are herein validated, namely Fiaponeurapenghiani gen. ＆ sp. nov. and Burmopsychops limoae gen. ＆ sp. nov.

A remarkable new genus of Cretaceous dustywings(Neuroptera: Coniopterygidae) in amber from northern Myanmar

A new dustywing genus and species, namely Cretaconiopteryx grandis gen. ＆ sp. nov., from the mid-Cretaceous amber of Myanmar is herein described in the lacewing family Coniopterygidae. The new genus is distinguished from all other dustywing species by the combination of following morphological features： relatively large body-size, comparatively rich crossvenation, origin of RP＋MA near wing base in both fore-and hindwing, forewing RA and RP terminally fused into a loop, and proximally zig-zagged forewing Cu P. A new subfamily, Cretaconiopteryginae subfam. nov., is erected based on this spectacular new genus. The new subfamily might represent the basalmost lineage of known coniopterygids.

Minute clubbed beetles with cephalic horns in mid-Cretaceous amber from northern Myanmar(Coleoptera:Monotomidae)

A new fossil species of Monotomidae,Cretakarenni shaoi Li&Cai,sp.nov.,is reported from the mid-Cretaceous Burmese amber.The new species is attributed to the extinct genus Cretakarenni Peris&Delclòs,2015 primarily based on the paired setose projections on head,apparently 1-segmented antennal club,and transverse procoxal cavities with exposed trochantins.It differs from the previously reported C.birmanicus Peris&Delclòs from the same deposit in the more narrowly separated projections(cephalic horns)on vertex and the absence of elytral absutural lines.Our discovery of a new monotomid species from the mid-Cretaceous amber highlights the palaeodiversity and morphological disparity of the family in the late Mesozoic.

A catalogue of Burmite inclusions

Burmite（Burmese amber） from the Hukawng Valley in northern Myanmar is a remarkable valuable and obviously the most important amber for studying terrestrial diversity in the mid-Cretaceous. The diversity of Burmite inclusions is very high and many new taxa were found, including new order, new family/subfamily, and new genus. Till the end of 2016, 14 phyla, 21 classes, 65 orders, 279 families, 515 genera and 643 species of organisms are recorded, which are summized and complied in this catalogue. Among them, 587 species are arthropods. In addtion, the specimens which can not be identified into species are also listed in the paper. The information on type specimens, other materials, host and deposition of types are provided.