Paraxiphydria resinata J. Gao, Engel, & T. Gao, 2022

Gao, Jia, Engel, Michael S., Grímsson, Friðgeir, Gu, Lei, Ren, Dong & Gao, Tai-Ping, 2022, The first xiphydriid wood wasp in Cretaceous amber (Hymenoptera: Xiphydriidae) and a potential association with Cycadales, Fossil Record 24 (2), pp. 445-453 : 447-449

publication ID

https://doi.org/ 10.5194/fr-24-445-2022

persistent identifier

https://treatment.plazi.org/id/7D0F87FB-2542-E27F-E65D-FB2D10F6F9E1

treatment provided by

Felipe

scientific name

Paraxiphydria resinata J. Gao, Engel, & T. Gao
status

sp. nov.

Paraxiphydria resinata J. Gao, Engel, & T. Gao , sp. nov.

Diagnosis

As for the subfamily (vide supra).

Etymology

The new genus-group name is a combination of Ancient

Greek parAE (, meaning, “near”) and Xiphydria Latreille

(diminutive of xíphos []; ξιφδιoν, meaning, “dagger”, and feminine suffix – ia [–]), type genus of the family. The gender of the name is feminine.

Paraxiphydria resinata J. Gao, Engel, & T. Gao , sp. nov. urn:lsid:zoobank.org:act:4E50875E-AB9D-4423-A391-514F69AB3AF6

Diagnosis

As for the genus (vide supra).

Description

Total body length 4.9 mm in lateral view; antenna 1.8 mm long in ventral view; forewing about 4.0 mm in length, maximum width 1.3 mm; hind wing about 2.7 mm in length.

Antenna with 14 antennomeres, antennal length 2.2× head width; scape 2.1× as long as pedicel, scape length 2.9× its width; pedicel length 2.3× its width; flagellomere I 1.3× as long as flagellomere II; flagellomeres gradually and slightly tapering distally. In frontal view, face slightly roughened; genal carina absent; mandibles subquadrate, quinquidentate (five teeth) ( Fig. 2c View Figure 2 ); in lateral view, maxillary palpus pentamerous (five palpomeres) ( Fig. 2e View Figure 2 ); labial palpus trimerous (three palpomeres) ( Fig. 2d View Figure 2 ). Sculpturing and setation of head posterior to ocelli not clearly visible.

Thorax narrow, width across tegulae 0.8 mm. Pronotum short and pronotal collar nearly straight anteriorly. Mesoscutum with longitudinal sulcus and notauli strongly impressed, ratio of lengths of prescutum, longitudinal sulcus between notauli and mesoscuto-mesoscutellar sulcus, and mesoscutellum 6: 1: 13; meso- and metathorax slightly roughened, with parallel reticulations especially on mesoscutellum; transcutal sulcus absent; cenchri small and oval. Protibia with one apical spur ( Fig. 2h View Figure 2 ), mesotibial spur not visible, metatibia with two apical spurs ( Fig. 2i View Figure 2 ); tibiae without preapical spurs; metafemur 5.7× as long as broad; metabasitarsus length 0.4× metatarsus and longer than metatarsomere V; tarsi without pulvilli (plantulae); pretarsal claws strongly curved apically, without inner ramus ( Fig. 2f View Figure 2 ), metapretarsal claw similar to mesopretarsal claw.

Abdominal tergum I divided medially, forming subquadrate hemitergites; abdominal segments VIII and IX twice as long as individual lengths of preceding segments; ovipositor short, sheath in dorsal view extending about 0.2× length of metatibia beyond abdominal apex.

Forewing ( Fig. 1c View Figure 1 ) with abundant microtrichia, membrane hyaline and clear, except slightly infumate in costal space; C and R thick, costal space narrower than individual widths of C and R; pterostigma completely sclerotized throughout; 1r-rs and 2rs-m absent; 2r-rs issuing from middle of pterostigma; 1Rs short and proclival to R, about 0.6× as long as 1M, meeting 1M nearly orthogonally; 2M present but exceptionally short, 0.1× as long as Rs+M; 2r-rs slightly proclival; 3+4M as long as 5M; cell 1mcu pentagonal, about 1.9× as long as wide; cell 2mcu hexagonal, about 1.2× as long as wide; 2Cu 2.0× as long as 1Cu; 1cu-a strongly reclival, nearly 0.5× as long as 1Cu; 1m-cu, 3Cu and 4Cu subequal; 1m-cu only slightly distad of the origin of 2Rs; 2m-cu nearly 0.8× as long as 5M and 1.2× as long as 1m-cu.

Hind wing ( Fig. 1d View Figure 1 ) with Sc absent; cell r open; 1Rs about 0.2 mm in length, nearly as long as 1M; 1rs-m about 0.1 mm in length, reclival and shorter than 1Rs; 1M straight; 3rsm and 1m-cu absent, terminal abscissa ending of Cu and cu-a well-developed, about 0.3 mm in length, 1Cu and cu-a straight.

Material

Holotype. Female, no. CNU-HYM-MA2015104; earliest Cenomanian (Cretaceous), amber, Hukawng Valley , Kachin, northern Myanmar; College of Life Sciences and Academy for Multidisciplinary Studies , Capital Normal University , Beijing, China.

Etymology

The specific epithet is a noun combining the Latin noun rēsīna (meaning, “resin”) and the adjectival suffix ātus (forming adjectives from nouns indicates the possession of a quality).

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