Diverse Texas beetles (Coleoptera: Elateroidea: Brachypsectridae) in mid-Cretaceous Burmese amber: sexual dimorphism and palaeoecology

2019 ◽  
Vol 2 (5) ◽  
pp. 523-531 ◽  
Author(s):  
ERIK TIHELKA ◽  
DIYING HUANG ◽  
CHENYANG CAI
Keyword(s):  
Sexual Dimorphism ◽  
Posterior Margin ◽  
New Genus ◽  
Distribution Range ◽  
Disjunct Distribution ◽  
Sexually Dimorphic ◽  
Fossil Species ◽  
Burmese Amber ◽  
The Family

Brachypsectridae is a species-poor elateroid family containing two extant genera with a disjunct distribution range spanning the Nearctic, Palaearctic, Oriental, and Australian regions. Here we describe a second Texas beetle from mid-Cretaceous Burmese amber, Hongipsectra electrella gen. et sp. nov. The new genus can be distinguished from all hitherto known brachypsectrids by the 11-segmented sexually dimorphic antennae with antennomeres 6–10 bilamellate in males and serrate in females, pronotum with a pair of posterolateral carinae and an M-shaped notch in the posterior margin for the reception of a cordiform scutellum. The present discovery adds a fourth genus and eleventh species to Brachypsectridae. Given that two of the known Texas beetle genera are from the Cretaceous Burmese amber, the family probably have been much more widespread and diverse in the Mesozoic than it is today. A key to the extant and fossil genera of Brachypsectridae is provided, along with a list of fossil species.

scholarly journals <i>†</i><i>Cretolixon</i> – a remarkable new genus of rhopalosomatid wasps (Hymenoptera: Vespoidea: Rhopalosomatidae) from chemically tested, mid-Cretaceous Burmese (Kachin) amber supports the monophyly of Rhopalosomatinae

Fossil Record ◽  
2020 ◽  
Vol 23 (2) ◽  
pp. 215-236
Author(s):  
Volker Lohrmann ◽  
Qi Zhang ◽  
Peter Michalik ◽  
Jeremy Blaschke ◽  
Patrick Müller ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Early Cretaceous ◽  
Late Jurassic ◽  
New Genus ◽  
Sister Group ◽  
Fossil Species ◽  
Burmese Amber ◽  
The Family ◽  
The World ◽  
Key Characters

Abstract. Rhopalosomatidae, currently considered the sister group of the Vespidae, are an enigmatic family of aculeate wasps that originated in the Late Jurassic or Early Cretaceous. Despite their considerable age, very few fossils of the family have been reported – all of them in amber (Miocene Dominican, Miocene Mexican, and mid-Cretaceous Burmese ambers). Here we report a new mid-Cretaceous rhopalosomatid wasp, Cretolixon alatum Lohrmann, gen. et sp. nov., from Burmese (Kachin) amber. This new genus has a unique mixture of characters, some of which are only known from the recent brachypterous genus Olixon and others of which are known only from the recent macropterous genera. Thus, Cretolixon Lohrmann, gen. nov. not only provides further evidence for the monophyly of the family but also contributes evidence for the monophyly of the Rhopalosomatinae. Key characters of the family are discussed, and an updated checklist of the world genera and fossil species and occurrences of Rhopalosomatidae is provided. Additionally, a chemical analysis was performed for three of the newly reported fossils as well as for the amber piece containing the rhopalosomatid larva described by Lohrmann and Engel (2017) to ascertain their amber vs. copal nature and their affinities with each other and previously described Burmese amber.

scholarly journals Trihelota, a new and unusual helotid beetle genus from mid-Cretaceous Burmese amber (Coleoptera: Helotidae)

2020 ◽  
pp. 509-516
Author(s):  
Erok Tihelka ◽  
Diying Huang ◽  
Chenyang Cai
Keyword(s):  
Fluorescence Microscopy ◽  
New Genus ◽  
Single Species ◽  
Fossil Species ◽  
Burmese Amber ◽  
Morphological Disparity ◽  
X Ray ◽  
The Family

A new genus belonging to the cucujoid family Helotidae, Trihelota gen. nov., is described from mid-Cretaceous (ca.99 million years old) amber from Kachin State, northern Myanmar, containing a single species T. fulvata sp. nov. The minute fossil was documented using fluorescence microscopy and X-ray microtomography to reveal fine morphological details. Trihelota is characterised by its transverse head, antennal club about 1.5 times longer than wide, pronotum almost parallel-sided, and elytra not costate. Notably, each elytron possesses three coloured spots, a character unique within Helotidae. The new genus considerably expands the known morphological disparity of Cretaceous helotids. A keyto extinct and extant genera of the family Helotidae is provided along with a checklist of fossil species.

A new genus and species of Micromalthidae from Burmese amber (Coleoptera: Archostemata)

2019 ◽  
Vol 111 (1) ◽  
pp. 39-46
Author(s):  
Erik TIHELKA ◽  
Diying HUANG ◽  
Chenyang CAI
Keyword(s):  
Reproductive System ◽  
New Genus ◽  
New Genus And Species ◽  
Fossil Species ◽  
Burmese Amber ◽  
The Family

ABSTRACTMicromalthidae is a small relictual family of archostematan beetles that is well known for its unusual asexual reproductive system characterised by parthenogenetic, viviparous, larviform females and sterile adults. Here we describe the first micromalthid beetle from mid-Cretaceous Burmese amber (ca.100Ma). Protomalthus burmaticus gen. et sp. nov. differs from all presently known micromalthid beetles by the presence of distinct frontoclypeal, labroclypeal, and medicranial sutures. The finding represents the first Mesozoic record of an adult micromalthid beetle and confirms a Gondwanan distribution of the family during the Cretaceous. A list of micromalthid beetles is provided, together with a key to extant and fossil species.

On Candinia (Sacoglossa: Juliidae), a new fossil genus of bivalved gastropods

1996 ◽  
Vol 70 (2) ◽  
pp. 230-235 ◽  
Author(s):  
Jacques Le Renard ◽  
Bruno Sabelli ◽  
Marco Taviani
Keyword(s):  
New Genus ◽  
First Record ◽  
Fossil Species ◽  
Shallow Marine ◽  
Marine Deposits ◽  
The Family ◽  
Life Habits ◽  
The Mediterranean ◽  
Fossil Genus ◽  
The Mediterranean Basin

The record of the fossil representatives of the family Juliidae is updated. The new genus Candinia is proposed, in the subfamily Juliinae, for two fossil species somewhat intermediate between Julia and Berthelinia. The new species Candinia pliocaenica is recorded from the lower Pliocene shallow marine deposits near Siena (Tuscany, Italy). This is the first record of Sacoglossa in the Mediterranean Basin. Based on the very specialized life habits of the Juliidae, it is suggested that subtropical Caulerpa algal prairies inhabited the Mediterranean during the early Pliocene, likely becoming extinct in this basin because of the mid-Pliocene climatic deterioration.

A new scale insect of the extinct family Weitschatidae (Insecta: Hemiptera: Coccomorpha) from mid-Cretaceous Burmese amber

Zootaxa ◽  
2018 ◽  
Vol 4407 (3) ◽  
pp. 427
Author(s):  
SHAN LIN ◽  
YUNZHI YAO ◽  
DONG REN
Keyword(s):  
New Species ◽  
New Genus ◽  
Scale Insect ◽  
Identification Key ◽  
New Genus And Species ◽  
Key To Species ◽  
Burmese Amber ◽  
Fossil Specimen ◽  
The Family

A new genus and species of the extinct family Weitschatidae, Criniverticillus longicumulus gen. et sp. nov. (Hemiptera: Coccomorpha), is described and illustrated from mid-Cretaceous Burmese amber. The new species is based on a fossil specimen with complete body, wings and antennae. The family diagnosis is updated to include similarities between Criniverticillus, Pseudoweitschatus and Weitschatus. An identification key to species of Weitschatidae is provided. 

Pinguisoperla, a new fossil genus of Perlidae (Insecta: Plecoptera) from mid-Cretaceous Burmese amber

Zootaxa ◽  
2018 ◽  
Vol 4425 (3) ◽  
pp. 596 ◽  
Author(s):  
ZHI-TENG CHEN
Keyword(s):  
New Genus ◽  
Morphological Characters ◽  
New Genus And Species ◽  
Burmese Amber ◽  
The Family ◽  
Fossil Genus ◽  
Dark Coloration

A new fossil stonefly genus and species of the family Perlidae, Pinguisoperla yangzhouensis gen. et sp. nov., is proposed as the second known genus from mid-Cretaceous Burmese amber. The new genus is characterized by its dark coloration and the basally enlarged and curved cerci. Morphological characters of the new genus and species are described, illustrated, and compared with related taxa. 

Some new and known species of Bomolochidae (Copepoda, Cyclopoida) parasitic on Japanese actinopterygian fishes, 1 — with discussion on sexually dimorphic features in the family

Crustaceana ◽  
2020 ◽  
Vol 93 (8) ◽  
pp. 891-929
Author(s):  
Kunihiko Izawa
Keyword(s):  
Sexual Dimorphism ◽  
Sexually Dimorphic ◽  
The Family ◽  
Actinopterygian Fishes ◽  
Copepoda Cyclopoida

Abstract Three new and five known species of Bomolochidae Claus, 1875, parasitic on Japanese actinopterygian fishes, are (re)described. They are Bomolochus bellones Burmeister, 1835, B. decapteri Yamaguti, 1936, B. hoi sp. nov., Naricolax sphyraenae sp. nov., Nothobomolochus cypseluri (Yamaguti, 1953), Orbitacolax brevispinus Moon, Choi & Venmathi Maran, 2018, O. scombropsi sp. nov., and O. unguifer Kim & Moon, 2013. The copepodid IV female of B. bellones, the male and copepodid IV female of Na. sphyraenae, the male and copepodid IV and V female of No. cypseluri and O. unguifer are herein described. Sexual dimorphism is found in the antennule, maxilliped, and legs in the family.

A revision of the Heatherellidae (Parasitiformes: Mesostigmata) with a new genus and two new species from Australasia

Zootaxa ◽  
2018 ◽  
Vol 4434 (3) ◽  
pp. 441
Author(s):  
OWEN D. SEEMAN ◽  
MARIA MINOR ◽  
MICHELLE R. BAKER ◽  
DAVID EVANS WALTER
Keyword(s):  
New Species ◽  
New Zealand ◽  
Sexual Dimorphism ◽  
New Genus ◽  
New South ◽  
New South Wales ◽  
The North ◽  
South Wales ◽  
The Family ◽  
Two New Species

The discovery of a new genus of Heatherellidae in New Zealand has led us to revise this enigmatic family and its constituent genera. Aheatherella n. gen., based on A. mira n. sp. from the North Island of New Zealand, lacks some of the derived character states that link the Australian Heatherella, most notably the lack of sexual dimorphism in the dorsal shields and in the presence of peritremes in adult Aheatherella. Heatherella osleri n. sp. is described from New South Wales, extending the distribution of this genus beyond Queensland. New collection records of H. callimaulos and a key to the genera and species of the family are provided. We propose that the Heatherellidae—previously placed in its own cohort outside the Gamasina—are best considered a superfamily of gamasine mites within the subcohort Epicriiae. 

An interesting sexually dimorphic species, Neoribates isabelaensis sp. nov. (Acari, Oribatida, Parakalummidae) with remarks on sexual dimorphism in Oripodoidea 

Zootaxa ◽  
2017 ◽  
Vol 4347 (1) ◽  
pp. 94
Author(s):  
BADAMDORJ BAYARTOGTOKH ◽  
SERGEY G. ERMILOV ◽  
LEONILA CORPUZ-RAROS
Keyword(s):  
Sexual Dimorphism ◽  
Posterior Part ◽  
The Philippines ◽  
Similar Species ◽  
Sexually Dimorphic ◽  
The Family ◽  
Pheromonal Communication ◽  
Large Round ◽  
Dimorphic Species ◽  
A New Species

A new species Neoribates isabelaensis sp. nov. showing an interesting sexual dimorphism is described from bamboo litter on Luzon Island in the Philippines. This species is unique among other species of Neoribates in the structure of the posterior part of notogaster in males, which has a large round concavity bearing a pair of large sacculi S3. The specific function of this structure is not yet known, but the found sexual dimorphism is presumably involved in pheromonal communication allowing rapid sperm transfer. This is the fourth Neoribates species displaying sexually dimorphic characters. Additionally, Neoribates isabelaensis sp. nov. differs from the morphologically most similar species, Neoribates barbatus Hammer, 1968, by its smaller body size, pointed rostrum, long and setiform bothridial setae and the localization of notogastral setae h1 and h2, which insert close to each other. Further, we discussed all cases of sexual dimorphism in the family Parakalummidae as well as other related groups of Oripodoidea, and the possible function of these modifications. 

First male of Corethrella andersoni Poinar & Szadziewski, 2007 (Diptera: Corethrellidae) from mid-Cretaceous Burmese amber

2018 ◽  
Vol 1 (1) ◽  
pp. 47 ◽  
Author(s):  
RYSZARD SZADZIEWSKI ◽  
ELŻBIETA SONTAG
Keyword(s):  
North Africa ◽  
Lower Cretaceous ◽  
Biting Midges ◽  
Northern Asia ◽  
Fossil Species ◽  
Burmese Amber ◽  
Annotated List ◽  
Extant Species ◽  
The Family ◽  
Single Genus

The family Corethrellidae, called frog-biting midges, with the single genus Corethrella Coquillett, 1902, is a small group of dipterans including 107 extant species (Borkent, 2017). Females of most species are haematophagous and feed on males of frogs and toads locating them by their calls (Borkent, 2008). Extant frog-biting midges have a pantropical distribution, absent in Europe, north Africa, middle and northern Asia (Giłka & Szadziewski, 2009). The genus during its phylogenetic history dated back to Lower Cretaceous (125–129 Ma) had a broader geographical distribution, and during Eocene was present in Europe. Till now nine fossil species have been described from Lower Cretaceous Lebanese amber (1), mid-Cretaceous Burmese amber (1), Eocene Baltic amber (5) and Miocene Dominican amber (2) (a complete annotated list is provided below). 

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