Nanoraphidia electroburmica Engel, 2002, Engel, 2002

Liu, Xingyue, Lu, Xiumei & Zhang, Weiwei, 2016, New genera and species of the minute snakeflies (Raphidioptera: Mesoraphidiidae: Nanoraphidiini) from the mid Cretaceous of Myanmar, Zootaxa 4103 (4), pp. 301-324: 318-321

publication ID

http://doi.org/10.11646/zootaxa.4103.4.1

publication LSID

lsid:zoobank.org:pub:B6428194-1C7A-4A9F-9038-EE4A78222A06

persistent identifier

http://treatment.plazi.org/id/03FBD81A-AF3E-FFB6-FF58-F95CAA84A212

treatment provided by

Plazi

scientific name

Nanoraphidia electroburmica Engel, 2002
status

 

Nanoraphidia electroburmica Engel, 2002  

( Figs. 12–13 View FIGURE 12 View FIGURE 13 )

Nanoraphidia electroburmica Engel, 2002: 3   .

Diagnosis. As for the genus.

Description. EMTG BA-001202. Female. Body length 3.9 mm (measured without ovipositor) and 5.9 mm (measured with ovipositor). Head length 0.4 mm; antenna length 1.0 mm; prothorax length 0.3 mm; meso- plus metathorax length 0.4 mm; forewing length 4.1 mm, maximum width 1.2 mm; hindwing length 3.9 mm, maximum width 1.1 mm; abdomen length 1.5 mm (measured without ovipositor) and 3.5 mm (measured with ovipositor); ovipositor 2.0 mm long and 0.05 mm wide. Morphology in general almost identical to holotype of N. electroburmica   based on original description in Engel (2002). Cephalic and thoracic characters incongruent with that in Engel (2002) refer to: Mandible with only one subdistal inner tooth; pretarsus with arolium reduced. Abdomen with segments 1–2 narrow, but with remaining pregenital segments distinctly swollen. Detail morphology of genital segments hardly visible; sternum 7 about 1.5 × length of tergum 8, with posterior margin not produced; segment 8 with a ventrally extending tergum 8, and probably membranous ventrally; tergum 9 rather narrow dorsad but broadened ventrad; ectoproct broadly ovoid; ovipositor distally narrowed and widely apart, with a pair of small digitiform gonostyli.

EMTG BA-002164. A male and a conspecific female preserved in same amber piece. Male. Body length 5.8 mm. Head length 0.9 mm; prothorax length 0.7 mm; meso- plus metathorax length 1.1 mm; forewing length 5.3 mm; hindwing length 4.8 mm; abdomen length 3.0 mm. Female. Body length ~ 8.2 mm (measured without ovipositor) and ~ 10.4 mm (measured with ovipositor). Forewing length 7.6 mm, maximum width 1.6 mm; hindwing length 6.3 mm, maximum width 1.5 mm. General morphology and wing venation almost same to that in holotype of N. electroburmica   .

PCXJ BA-0004. A just emerged male with wings incompletely stretching on distal parts. Body length 3.8 mm. Head with clypeus and mouthparts not preserved; portion posterior to compound eyes nearly as long as eye diameter; ocelli invisible. Prothorax length 0.3 mm; meso- plus metathorax length 0.6 mm; forewing length ~ 2.9 mm; hindwing length ~ 2.3 mm; abdomen length ~ 1.7 mm. Genitalia visible in dorsal and ventral view; tergum 9 in dorsal view nearly pentagonal, with concaved anterior margin and convex posterior margin; a pair of long digitiform sclerites (putative gonocoxites 9 or gonocoxites + gonostyli 9) present beneath tergum 9, posterolaterally directing in natural condition (the right one with distal half incurved due to preservation condition), proximally broad, distally with a spinous projection; ectoproct nearly as long as but much narrower than tergum 9, posteriorly slightly convex, bearing some long setae.

Materials examined. EMTG BA-001202: amber piece preserving a complete adult female of N. electroburmica   ; it is polished in the form of a suboblong cabochon, transparent, with length×width about 21.3 × 8.1 mm, height about 8.0 mm. EMTG BA-002164: amber piece preserving a couple (a male and a female) of N. electroburmica   , with bodies mostly preserved except for distal parts of heads, distal parts of male and female genitalia; it is polished in the form of an elliptical cabochon, transparent with numerous particles and bubbles, with length×width about 27.0× 17.2 mm, height about 10.5 mm. PCXJ BA-0004: amber piece preserving a complete, just emerged, adult male of N. electroburmica   , and two psocopterans; it is polished in the form of an ovoid cabochon, transparent, with length×width about 21.8 × 16.7 mm, height about 5.3 mm.

Remarks. It is notable that the two females of N. electroburmica   herein examined greatly differ from each other in body size. The forewing length of female specimen EMTG BA-001202 is 4.1 mm, while in the female specimen EMTG BA-002164 the forewing is 7.6 mm long. However, we could not find any other morphological differences between them. Thus, we tentatively identify them to be a same species. If this identification is verified, the size (i.e. forewing length ≤ 6.0 mm) could not be a constant diagnostic feature to distinguish all nanoraphidiine species from other mesoraphidiids.

We also tentatively identify a just emerged male to be N. electroburmica   because of the head with portion posterior to compound eyes nearly equal in length to the length of eye, the short antennae, and the presence of only one forewing discoidal cell, although the ocelli and the diagnostic trifurcate MA are invisible in this specimen.

Key to species of Nanoraphidiini based on non-wing characters (modified from Pérez-de la Fuente et al. 2012)

1. Compound eye shorter, equal, or not much longer than head posterior to eyes; antenna with a low number of flagellomeres (≤ 30)................................................................................................. 2

- Compound eye longer than head posterior to eyes; antenna elongate, with a high number of flagellomeres (≥ 38)..................... 6

2. Head ovoid; compound eye shorter or equal than head posterior to eyes; antenna with less than 26 flagellomeres; metatibia without process at its midpoint........................................................................... 3

- Head quadrangular; compound eye slightly longer than head posterior to eyes; antenna with 26 flagellomeres; metatibia with a process at its midpoint (Pérez-de la Fuente et al. 2010: fig. 4)...................................................................................... .. Cantabroraphidia marcanoi   Pérez-de la Fuente, Nel, Peñalver & Delclòs, 2010

3. Compound eye not distinctly shorter than head posterior to eyes; ocelli positioned between posterior half of compound eyes ( Fig. 12 View FIGURE 12 A).......................................................................................... 5

- Compound eye distinctly shorter than head posterior to eyes; ocelli, if present, positioned between anterior half of compound eyes (Pérez-de la Fuente et al. 2012: fig. 8)................................................................ 4

4. Pronotum slightly shorter than head and much shorter than meso- plus metathorax ( Martynov 1925: fig. 7)............................................................................... Grimaldiraphidia parvula ( Martynov, 1925)

- Pronotum slightly longer than head but slightly shorter than meso- plus metathorax (Pérez-de la Fuente et al. 2012: fig. 8).................................... Amarantoraphidia ventolina Pérez-de la Fuente, Peñalver, Delclòs & Engel, 2012

5. Compound eye nearly as long as head posterior to eyes; antenna longer than head length; posterior border of head without a collar-like lip ( Fig. 12 View FIGURE 12 A).............................................. Nanoraphidia electroburmica Engel, 2002  

- Compound eye apparently slightly longer than head posterior to eyes; antennae shorter than head length; posterior border of head with a collar-like lip (Grimaldi 2000: fig. 1).......................... Grimaldiraphidia luzzii (Grimaldi, 2000)

6. Clypeus slightly shorter or equal than length of compound eye; all tibiae swollen ( Fig. 1 View FIGURE 1 C).......................... 7

- Clypeus slightly shorter than half length of compound eye; pro- and mesotibiae swollen, but metatibiae slender ( Fig. 7 View FIGURE 7 A).. 10

7. Clypeus prolonged, rostrum-like, as long as compound eye; antenna moderately elongate, with ~ 40 flagellomeres ( Fig. 5 View FIGURE 5 D; Pérez-de la Fuente et al. 2012: fig. 11).................................................................... 8

- Clypeus not distinctly prolonged, slightly shorter than compound eye; antenna extremely elongate, with 100 or more flagellomeres ( Figs. 1 View FIGURE 1 , 3 View FIGURE 3 )............................................................................... 9

8. Ocelli present; bilobed extensions of third tarsomere with distal digitiform processes (Pérez-de la Fuente et al. 2012: fig. 11).................................... Alavaraphidia imperterrita Pérez-de la Fuente, Peñalver, Delclòs & Engel, 2012

- Ocelli absent; bilobed extensions of third tarsomere without distal digitiform processes ( Fig. 5 View FIGURE 5 )................................................................................................. Rhynchoraphidia burmana   sp. nov.

9. Head length 0.6–0.8 mm; antenna nearly twice as long as body, with ~ 100 flagellomeres ( Fig. 1 View FIGURE 1 A)............................................................................................... Dolichoraphidia aspoecki   sp. nov.

- Head length 0.3–0.4 mm; antenna ~ 2.5 times as long as body, with more than 100 flagellomeres ( Fig. 3 View FIGURE 3 A).......................................................................................... Dolichoraphidia engeli   sp. nov.

10. Compound eye ~2.0× length of head posterior to eyes ( Bechly & Wolf-Schwenninger, 2011: fig. 5)......................................................................... Lebanoraphidia nana Bechly & Wolf-Schwenninger, 2011

- Compound eye ~4.0× length of head posterior to eyes ( Fig. 7 View FIGURE 7 A).......................... Burmoraphidia reni   sp. nov.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Raphidioptera

Family

Mesoraphidiidae

Genus

Nanoraphidia

Loc

Nanoraphidia electroburmica Engel, 2002

Liu, Xingyue, Lu, Xiumei & Zhang, Weiwei 2016
2016
Loc

Nanoraphidia electroburmica

Engel 2002: 3
2002