Polemistus gutianus Ma et Li,

Ma, Li & Li, Qiang, 2020, The genus Polemistus de Saussure in China with descriptions of four new species (Hymenoptera: Crabronidae), Zootaxa 4852 (4), pp. 475-484: 480-482

publication ID

https://doi.org/10.11646/zootaxa.4852.4.5

publication LSID

lsid:zoobank.org:pub:486DDE4C-8301-41C7-85EA-57AC12ABB617

DOI

http://doi.org/10.5281/zenodo.4410115

persistent identifier

http://treatment.plazi.org/id/1D9D7C28-CA90-4D2A-B467-9B74A2AD1C28

taxon LSID

lsid:zoobank.org:act:1D9D7C28-CA90-4D2A-B467-9B74A2AD1C28

treatment provided by

Plazi

scientific name

Polemistus gutianus Ma et Li
status

sp. nov.

3. Polemistus gutianus Ma et Li  , sp. nov.

( Figure 3View FIGURE 3)

urn:lsid:zoobank.org:act:1D9D7C28-CA90-4D2A-B467-9B74A2AD1C28

Material examined. Holotype: ♀, China: Zhejiang: Gutian Mountain: Gutian Temple , 29°15'N 118°09'E, 2005. VII.2, NO. 200707724, coll. Qiong WuGoogleMaps  ; Paratype: 1♂, China: same as the holotype, 2005.VII.2, NO. 200707758, coll. Qiong Wu  ; 1♀, same as the holotype, 2003.VIII.19, NO. 20044123 coll. Qiong Wu. All specimens are deposited in the Parasitic Hymenoptera  Collection of Zhejiang University, Hangzhou, Zhejiang Province, P. R. China  .

Diagnosis. Unlike the other Chinese Polemistus  , this species and P. abnormis  lack the median frontal carina and the hypersternaulus. P. gutianus  differs from P. abnormis (Kohl, 1888)  by the following combination of characters: labrum semicircular ( Fig. 3aView FIGURE 3); median and lower frons shallowly concave, lower frons with sparse, transverse striation medially; gena and head underside with large, dense punctures; inner eye orbits moderately convergent toward clypeus ( Fig. 3aView FIGURE 3); pronotal collar incomplete, just a corner present on each side; mesoscutum without rugae posteriorly; dorsal surface of petiole with longitudinal groove medially ( Fig. 3eView FIGURE 3); gastral segment I half mat, with fine, dense punctures and slightly coriaceous; in female, free margin of clypeus with small tooth on each side ( Fig. 3aView FIGURE 3); male flagellomeres I–VI beneath with tyloids ( Fig. 3gView FIGURE 3).

P. abnormis (Kohl, 1888)  has the following characters: labrum broadly rectangular; median and lower frons deeply concave, lower frons with dense, transverse striation medially; gena and head underside with fine to midsize, dense punctures; inner eye orbits markedly convergent toward clypeus; pronotal collar much narrowed, without anterior ridge; mesoscutum with short, longitudinal rugae posteriorly; dorsal surface of petiole without groove; in female, free margin of clypeus with large prominence on each side; gastral segment I shiny, impunctate; male flagellomeres I–VIII or IX beneath with tyloids.

Description. Female and male. Black. labrum ivory to yellowish; palpi, scape, pedicel beneath, pronotal lobe ivory; pedicel above, forewing veins brown; tegula yellowish to fulvous; gastral sterna V–VI dark brown.

Mandible bidentate apically, outer tooth small, inner tooth much broadened or broad ( Fig. 3aView FIGURE 3). Labrum semicircular ( Fig. 3aView FIGURE 3). Interantennal tubercle narrow, short. Median and lower frons shallowly concave, frontal median carina lacking ( Fig. 3aView FIGURE 3); lower frons with sparse, slender and transverse striation medially, with irregular rugae laterally; median frons with large, dense punctures and several inconspicuous, curving rugae (rugae sometimes lacking). Upper frons with midsize to large, dense punctures. Ocellar triangle moderately convex, with fine to midsize, dense punctures. Vertex behind ocelli with dense, slender, transverse striation. Gena and head underside coarsely coriaceous, with large, dense punctures. Occipital furrow much narrowed, coarsely crenate. Inner orbital furrow narrow, slightly crenate, marginal carina sturdy, inner eye orbits moderately convergent toward clypeus ( Fig. 3aView FIGURE 3). Outer orbital furrow much narrowed, with sturdy marginal carina, coarsely crenate.

Pronotal collar incomplete, with just lateral corner. Mesoscutum coarsely coriaceous, with contiguous, midsize punctures, anterior slope nearly vertical and very high ( Fig. 3cView FIGURE 3); admedian line impressed, extending to one third of mesoscutum length, coriaceous, with midsize, dense punctures. Metanotum coarsely coriaceous, with fine, dense punctures. Mesopleuron coarsely coriaceous, with large, sparse punctures, episternal sulcus and omaulus conspicuously crenate, scrobal sulcus just forming carina, not crenate, hypersternaulus incomplete or lacking ( Fig. 3cView FIGURE 3). Propodeal enclosure not delimited by carina, with sturdy reticulation medially, and sparse, slender, oblique longitudinal rugae laterally ( Fig. 3dView FIGURE 3); posterior surface with much narrowed groove medially, shiny, sides of groove large, nearly smooth, with fine, sparse punctures and some inconspicuous striation or finely coriaceous, laterally and posteriorly irregularly reticulate ( Fig. 3dView FIGURE 3). Lateral surface of propodeum with dense, sturdy, longitudinal rugae except irregularly rugose ventrally and reticulate posteriorly.

Petiole short, width equal to length, its dorsal surface shiny, smooth, with median longitudinal groove. Gastral segments half mat, with fine, dense punctures and slightly coriaceous. Gaster somewhat constricted between segments I and II.

Female. Body length 5.0– 5.3 mm; mandible brown; flagellomere I and II–IX beneath fulvous to reddish brown; fore and mid legs: coxae apically, trochanters, apical half of femora, tibiae and tarsi ivory; hind leg: coxa apically, trochanter, tibia and tarsus ivory to fulvous, femur largely reddish brown; Setae on clypeus sparse, short and silvery mixed with several long ones apically; inner tooth of mandible much broadened, nearly truncate ( Fig. 3aView FIGURE 3); clypeus flat, with midsize, sparse punctures, free margin broadly truncate medially, lateral area with one small tooth on each side; ratio of HW: HLD: HLF = 75: 38: 71; HW: EWd: IOW: EW: OOW: TW: OCW: EL = 75: 19: 3: 25: 2: 19: 1: 63; AOD: WAS: IAD = 3: 7: 8; POD: OOD: OCD = 10: 10: 14. Length of scape: of pedicel: of flagellomere I: width of flagellomere I: length of flagellomere II: width of flagellomere II = 26: 6: 6: 5: 6: 6; pygidial area lacking.

Male. Body length 4.3 mm. Mandible apically reddish brown; flagellomeres III–XI with narrow, dark brown bands basally, apical flagellomere dark brown apically, remainder fulvous to reddish brown; fore and mid legs: basal one fifth or one fourth of femora dark brown, remainder ivory; hind trochanter, outer margin and basal half of tibia, and tarsus ivory, coxa beneath, femur largely, remainder of tibia reddish brown. Setae on clypeus dense, silvery and short. Inner tooth of mandible broad and truncate. Clypeus with midsize, dense punctures, lateral tooth larger than in female ( Fig. 3fView FIGURE 3). Ratio of HW: HLD: HLF = 64: 31: 58; HW: EWd: IOW: EW: OOW: TW: OCW: EL = 64: 17: 3: 23: 1: 15: 1: 50; AOD: WAS: IAD = 3: 6: 6; POD: OOD: OCD = 10: 9: 12. Length of scape: of pedicel: of flagellomere I: width of flagellomere I: length of flagellomere II: width of flagellomere II = 23: 4.5: 5: 5: 4.5: 5. Flagellomeres I–VI beneath with long, broad, linear tyloids ( Fig. 3gView FIGURE 3). Genitalia ( Figs. 3View FIGURE 3 h–j).

Distribution. China (Zhejiang).

Etymology. The new species is named after the Gutian Mountain where the type specimens were collected.

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Departamento de Geologia, Universidad de Chile