identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
A0632F05551B51B9829B94B48E534797.text	A0632F05551B51B9829B94B48E534797.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Burmeumastax Husemann & Schall & Uchida & Kotthoff 2025	<div><p>Genus Burmeumastax gen. nov.</p><p>Figs 3, 4</p><p>Type species. —</p><p>Burmeumastax lexiae sp. nov., by monotypy.</p><p>Etymology. —</p><p>The genus name derives from a combination of the words “ Burma ” and “ Eumastacidae ” in reference to its geographical and phylogenetic affiliations, respectively.</p><p>Diagnosis. —</p><p>Pronotum with two distinct grooves. Anterior groove smooth, posterior groove sharp. Brachypterous. Last abdominal tergite consisting of 5–7 plates. Supraanal plate elongate, triangular. Sub-genital plate bulbous with apical central fold and lateral cercus-like lobes. Cercus slender, same length as supra-anal plate. Cercus and sub-genital plate setulose. Only dorsal (= middle) plate of last abdominal tergite setulose.</p><p>Remarks. —</p><p>Systematic placement of Burmeumastax inside Eumastacoidea is difficult. As Burmeumastax is a brachypterous genus, a comparison with most other fossil genera of the superfamily is impossible. The only two fossil genera that can be compared with Burmeumastax are Eoerianthus Gorochov, 2012 and Paleomastacris Perez-Gelabert et al., 1997 . The type and only species of the first genus, E. eocaenicus Gorochov, 2012, is from the Eocene (56–33.9 Mya) of North America (Wyoming, Green River Formation) (Gorochov and Labandeira 2012), thus separated from Burmeumastax by at least 40 My. Morphologically, Eoerianthus differs from Burmeumastax in having a body three times longer, featuring fully developed wings, a very different pronotum morphology with no dorsal grooves, and no small spines on the metafemur (Gorochov and Labandeira 2012). The abdominal apex and external genitalia were not preserved in the specimen of Eoerianthus . Paleomastacris ambarinus Perez-Gelabert et al., 1997, type and only species of the second genus, differs from Burmeumastax by being completely apterous, a pronotum without dorsal grooves, and external genitalia of alternate shape. The supraanal plate of P. ambarinus is diamond-shaped, while it is triangular in B. lexiae . The sub-genital plate consists of two ventrally separated triangle-shaped parts in P. ambarinus but is bulbous with a ventral fold in B. lexiae .</p><p>Without knowledge of the internal genitalia and specifically the phallic complex, attribution of Burmeumastax to one of the seven extant families of Eumastacoidea is problematic, as other morphological characters that could be used for diagnosis are lacking in this understudied group. Burmeumastax differs from modern-day Eumastacoidea by its last abdominal tergite consisting of several (5–7) separate parts. In extant species, this structure is made up of one joint or two lateral plates with just a small space dorsally (Dirsh 1966, Descamps 1979, Rowell and Bentos-Perreira 2001).</p></div>	https://treatment.plazi.org/id/A0632F05551B51B9829B94B48E534797	Public Domain	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.		Pensoft via Plazi	Husemann, Martin;Schall, Ole-Kristian Odin;Uchida, Kei;Kotthoff, Ulrich	Husemann, Martin, Schall, Ole-Kristian Odin, Uchida, Kei, Kotthoff, Ulrich (2025): The first Cretaceous Eumastacoidea (Orthoptera, Caelifera) from Burmese amber. Journal of Orthoptera Research 34 (1): 151-157, DOI: 10.3897/jor.34.134361
19A194A15E67579E9D7A2C23368C5336.text	19A194A15E67579E9D7A2C23368C5336.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Burmeumastax lexiae Husemann & Schall & Uchida & Kotthoff 2025	<div><p>Burmeumastax lexiae sp. nov.</p><p>Figs 3, 4</p><p>Holotype. —</p><p>Male; possibly nymph. Deposited in the amber collection of the LIB (GPIH 07011), Leibniz Institute for the Analysis of Biodiversity Change, Hamburg, Germany.</p><p>Etymology. —</p><p>The species is named after Lexi Husemann, the daughter of the first author of the study.</p><p>Locality and horizon. —</p><p>The specimen was included in amber found in Hkamti, Sagaing Division, Myanmar or Tanai, Kachin State Burma, Myanmar, two nearby amber mining locations. The amber from Hkamti is ca. 110 My old, and the amber from Tanai is ca. 99 My old.</p><p>Diagnosis. —</p><p>Same as for genus, since this is the only species.</p><p>Description. —</p><p>Body long and slender, about seven times as long as high. Body length (tip of head to tip of abdomen) 7.53 mm; 1.03 mm high (measured right in front of metathoracic leg).</p><p>Head. — Twice as high as wide and twice as high as body height. Top of head capsule to bottom tip of mouth parts, 2.05 mm; 1.03 mm width at widest point (eye level). Fastigium not elongated. Eyes large, ellipsoid, and laterally protruding from head. Eyes take up almost half the head height and are about twice as high as wide. Eye top to bottom 0.87 mm long, 0.45 mm wide. Distance from bottom of the eye to bottom of the head, 1.2 mm. Interocular distance (measured at top of head), 0.32 mm. Antennae missing except antennal bud, which is 0.32 mm long and reminiscent of a pinecone with scales closed. Antennal bud located right in front of the bottom of the eyes. Lower face slightly oblique in profile with mouthparts forming a cone or almost triangular shape. Right maxillary palpus 7 - segmented, 0.87 mm long in total.</p><p>Thorax. — Thoracic height 1.06 mm, of which 0.58 mm is covered by the pronotum. Pronotum 1.31 mm long dorso-laterally, slightly shorter at 1.12 mm ventro-laterally. Pronotum saddle-like, covering the thorax with distinct elevation. Pronotum marked by two distinct grooves on its dorsal surface, one smooth anteriorly, second sharp posteriorly.</p><p>Wings. — Brachypterous. Short wing buds can be seen sticking out from under the posterior margin of the pronotum. Wing buds ca. 0.42 mm long.</p><p>Legs. — Prothoracic leg: only preserved up to femur. Long and slender. Preserved part 1.64 mm long. Mesothoracic leg: only preserved up to femur. Long and slender. Preserved part 2.36 mm long. Metathoracic leg: femur very long, length / width ratio 4.2 mm / 0.77 mm = 5.5; thinning distally. Tibia thinning further along its length of more than 4 mm (metatibia not fully preserved) until it shares a width similar to pro- and mesofemur. Dorsal margin of metafemur on proximal half with spaced short fine hairs, which are replaced by small spines on distal half. Spines continuing along the dorsal margin of metatibia and getting larger distally (0.03 mm – 0.12 mm). Dislocated object in bottom left area probably left metatibia: 4.04 mm long (including three spines at distal end; these spines may be the apical spines of the metatibia).</p><p>Abdomen. — Abdomen with a distinct hump at the position of metathoracic legs. Last abdominal tergite made up of five to seven individual plates that cover the dorsal part of the genitalia like a ring. Dorsal (= middle) plate setulose. Supra-anal plate elongate, triangular. Sub-genital plate bulbous with central fold apically and lateral cercus-like lobes. Real cercus slender, ca. 0.47 mm long. Sub-genital plate and cercus setulose.</p><p>Remarks. —</p><p>Based on the short wing buds and the small body size, Burmeumastax lexiae may be a nymph. This is further supported by the abdomen not being curved upwards, as is the case in several male Eumastacoidea, for example Paralethus insolitus Rowell and Perez-Gelabert, 2006 or Episactus tristani Rehn &amp; Rehn, 1934 . However, in other species, such as Teicophrys robertsi (Rehn &amp; Rehn, 1939), the male abdomen is straight.</p></div>	https://treatment.plazi.org/id/19A194A15E67579E9D7A2C23368C5336	Public Domain	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.		Pensoft via Plazi	Husemann, Martin;Schall, Ole-Kristian Odin;Uchida, Kei;Kotthoff, Ulrich	Husemann, Martin, Schall, Ole-Kristian Odin, Uchida, Kei, Kotthoff, Ulrich (2025): The first Cretaceous Eumastacoidea (Orthoptera, Caelifera) from Burmese amber. Journal of Orthoptera Research 34 (1): 151-157, DOI: 10.3897/jor.34.134361
