Stenosigma imitans ( Ducke, 1911 )

Ferreira, Wellington D., De Oliveira, Letícia A. & Hermes, Marcel G., 2018, A revision of the Neotropical eumenine wasp genus Stenosigma Giordani Soika, 1978 (Hymenoptera, Vespidae), Zootaxa 4455 (3), pp. 499-512 : 502-503

Stenosigma imitans ( Ducke, 1911)

( Figs. 3 , 10 )

Pachymenes imitans DUcke, 1911: 188 , 192.

Pachymenes imitans ; NascimentO & OVeral, 1979: 8. Van der Vecht, 1981: 122.

Stenosigma imitans ; GiOrdani SOika, 1990: 148, 152. Hermes & Ferreira, 2016: 123.

Type data: Holotype female (MPEG).

Type locality: Oyapoc , Brazil.

Comments and Diagnosis. This species is easily recognized by the shorter clypeus, with length and width subequal ( Fig. 10 ). The clypeus is slightly emarginate, without carinae in the apical portion. This diagnostic feature is unique among the species of Stenosigma —in all other species the clypeus is longer than wide (compare Fig. 10 with Figs. 8, 9, 11–14 ). We have observed this condition in specimens of both sexes, unlike Giordani Soika (1990) who presented this character as unique to males in his identification key (Giordani Soika, 1990, p. 148). Unfortunately, the holotype is damaged, but the head has been preserved and can be seen in frontal view, allowing observation of the diagnostic character for this species, namely the shorter clypeus.

Type Material. Brazil, Para, Poste brasilien de l’Oyapoc: holotype ♀ ( MPEG).

Additional material examined. Costa Rica, Alhajuelo: 1 ♀ (AMNH), ‘Alhajuelo\ PanApr 10.11\ AugustBusck’ ‘ Stenosigma \ testaceum \ (Fox)\ Det. J. M. Carpenter’ (partially handwritten label). Brasil, Manacapurú: 1 ♀ (AMNH), ‘Manacapurú\ Brazil\ S. M. Klages’ ‘ Stenosigma ♀\ imitans (Ducke) \ Y. C. Grandinete det. 2015’ (partially handwritten label). Brazil, Roraima: 1 ♂ (INPA), ‘BRASIL-Roraima\ Rio Uraricoera\ Ilha de Maraca\ 02–13.v.1987 ’ ‘Eq. J. A. Rafael\ Arm. de Malaise’ ‘ Stenosigma \ imitans (Ducke) \ M. G. Hermes det. 2008’.

Collecting Records. Panama, Colombia, Costa Rica (Alhajuelo [new record]), Brazil (Manacapuru, Belém).

Figures

FIGURES 1–6. HabitUs: 1. Stenosigma allegrum (Zavattari), holotype ♀; 2. S. humerale Giordani Soika, holotype ♀; 3. S. imitans (Ducke), ♀; 4. S. mariae Ferreira & Hermes new species, holotype ♀; 5. S. panamensis Ferreira & Hermes neW species, holotype ♀; 6. S. quechua Hermes & Ferreira, hOlOtype ♀. Scale bar fOr all figUres = 0.5 cm.

FIGURES 7–12. 7. HabitUs: Stenosigma testaceum (FOX), lectOtype ♂. 8–12. Head, frOntal: 8. S. allegrum (ZaVattari), holotype ♀; 9. S. humerale GiOrdani SOika, hOlOtype ♀. 10. S. imitans, ♀. 11. S. mariae, hOlOtype ♀. 12. S. panamensis, holotype ♀. Scale bars for Figs. 7, 8, 11 = 0.5 cm; Figs. 9,10, 12 = 1 mm.