Labena Cresson, 1864

Marinho, Luana S. & Fernandes, Daniell R. R., 2025, Taxonomy of Labena Cresson, 1864 (Hymenoptera: Ichneumonidae: Labeninae) from Brazil, with description of two new species, Zootaxa 5660 (1), pp. 1-52 : 6-14

Key to the species of Labena Cresson, 1864 from Brazil *

*Except for Labena sericea

1 Propodeum, dorsal view, with area superomedia delineated anteriorly ( Fig. 4A ), without prominence; apophysis absent ( Fig. 5B )................................................................................................ 2

1’ Propodeum, dorsal view, with area superomedia not delineated anteriorly ( Fig. 4B ), with very large prominence; apophysis present ( Fig. 5A ).................................. Labena iquitosica Sääksjärvi, Bordera & González-Moreno, 2010

2 Metapleuron centrally with longitudinal striae ( Fig. 6A ); mesoscutum with notaulus impressed ( Fig. 7A ); propodeum with an area superomedia longer than wide ( Fig. 8A ).............................................. Labena larae sp. nov.

2’ Metapleuron centrally without longitudinal striae ( Fig. 6B ); mesoscutum without notaulus impressed ( Fig. 7B ); propodeum with area superomedia wider than long ( Fig. 8B )............................................................ 3

3 Propodeum with area superomedia quadrate ( Fig. 9A )........................................................ 4

3’ Propodeum with area superomedia hexagonal ( Fig. 9B )....................................................... 6 4 Area superomedia twice as long as area basalis ( Fig. 10A ); hind coxa with a brown spot on inner part ( Fig. 11A )........................................................................................ Labena morda Gauld, 2000

4’ Area superomedia four times as long as area basalis ( Fig. 10B ); hind coxa without a brown spot on inner part ( Fig.11B ).... 5

5 Mandibular teeth robust and truncated ( Fig. 12A ); area dentipara separated from area postero-externa ( Fig. 13A ); mesopleuron with conspicuous anterosuperior longitudinal spot ( Fig.14A )............................. Labena humida Gauld, 2000

5’ Mandibular teeth elongated and tapered ( Fig. 12B ); area dentipara confluent with area postero-externa ( Fig. 13B ); mesopleuron without conspicuous anterosuperior longitudinal spot ( Fig.14B )......................... Labena lachryma Gauld, 2000

6 Lateromedian longitudinal carina not obliterated posteriorly ( Fig. 15A ).......................................... 7

6’ Lateromedian longitudinal carina obliterated posteriorly ( Fig. 15B )............................................. 14 7 Clypeus with a crest on distal margin ( Fig.16A )..................................... Labena gloriosa Cresson, 1874

7’ Clypeus without a crest on distal margin ( Fig. 16B ).......................................................... 8

8 Anterior transverse carina, lateromedian longitudinal carina, and lateral longitudinal carina with black marks ( Fig. 17A ).............................................................. Labena littoralis González-Moreno & Bordera, 2015

8’ Anterior transverse carina, lateromedian longitudinal carina, and lateral longitudinal carina without black marks ( Fig. 17B )..................................................................................................... 8

9 Propodeum with area lateralis elongated ( Fig. 18A ).......................................................... 9

9’ Propodeum with area lateralis not elongated ( Fig. 18B )...................................................... 11 10 Area basalis wider than long ( Fig. 19A ); posterior area of propodeum with delimited areas ( Fig. 19B )................. 10

10’ Area basalis of equal proportions ( Fig. 19C ); posterior areas of the propodeum forming a single area ( Fig. 19C )......................................................................................... Labena pluvia Gauld, 2000

11 Sternite I centrally with swelling ( Fig. 20A ); ovipositor apex tapered with seven teeth ( Fig. 21A )............................................................................................... Labena guanacasteca Gauld, 2000

11’ Sternite I centrally without swelling ( Fig. 20B ); ovipositor apex tapered with four teeth ( Fig. 21B )..................................................................................................... Labena zerita Gauld, 2000

12 Propodeum with area petiolaris with distal longitudinal rugae (22A); hind coxa with a centrally depressed inner surface, arched at sides ( Fig. 23A )....................................................... Labena fiorii Graf & Marzagão, 1999

12’ Propodeum with area petiolaris without distal longitudinal rugae (22B); hind coxa with the inner surface not depressed centrally, not arched at sides ( Fig. 23B )........................................................................... 14

13 Posterior transverse carina of propodeum centrally complete ( Fig. 24A ); tergites I with elongate basal mark and pale yellow heart-shaped apical mark ( Fig. 25A )................................................ Labena espinita Gauld, 2000

13’ Posterior transverse carina of propodeum almost incomplete centrally ( Fig. 24B ); tergite I without elongated basal spot and light yellow cordiform apical spot ( Fig. 25B )........................................ Labena polemica Gauld, 2000

14 Epicnemial carina straight on the anterior part of the sternaulus ( Fig. 26A )....................... Labena fusca sp. nov.

14’ Epicnemial carina oblique on anterior part of sternaulus ( Fig. 26B )................................................................................. Labena marginata Szépligeti, 1914 (Adapted from González-Moreno et al. 2015).

Figures

FIGURE 4. A–B. A. Propodeum of Labena iquitosica, dorsal view; B. Propodeum of Labena lachryma, dorsal view.

FIGURE 5. A–B. A. Metapleuron of Labena iquitosica, lateral view. B. Metapleuron of Labena lachrymal, lateral view.

FIGURE 6. A–B. A. Metapleuron of Labena larae sp. nov., lateral view; B. Metapleuron of Labena lachryma, lateral view.

FIGURE 7. A–B. A. Mesoscutum of Labena larae sp. nov., dorsal view; B. Mesoscutum of Labena morda, dorsal view.

FIGURE 8. A–B. A. Propodeum of Labena larae sp. nov., dorsal view; B. Propodeum of Labena espinita, dorsal view.

FIGURE 9. A–B. A. Propodeum of Labena morda, dorsal view. B. Propodeum of Labena zerita, dorsal view.

FIGURE 10. A–B. A. Propodeum of Labena morda, dorsal view; B. Propodeum of Labena humida, dorsal view.

FIGURE 11. A–B. A. Hind coxa of Labena morda, ventral view; B. Hind coxa of Labena espinita, ventral view.

FIGURE 12. A–B. A. Head of Labena humida, front view; B. Head of Labena lachryma, front view.

FIGURE 13. A–B. A. Propodeum of Labena humida, dorsal view; B. Propodeum of Labena lachryma, dorsal view.

FIGURE 14. A–B. A. Mesopleuron of Labena humida, lateral view; B. Mesopleuron of Labena lachryma, lateral view.

FIGURE 15. A–B. A. Propodeum of Labena littoralis, dorsal view; B. Propodeum of Labena fusca sp. nov., dorsal view.

FIGURE 16. A–B. A. Head of Labena gloriosa, front view; B. Head of Labena littoralis, front view.

FIGURE 17. A–B. A. Propodeum of Labena littoralis, front view; B. Propodeum of Labena espinita, front view.

FIGURE 18. A–B. A. Propodeum of Labena guanacasteca, lateral view; B. Propodeum of Labena polemica, lateral view.

FIGURE 19. A–C. A. Propodeum of Labena guanacasteca, dorsal view; B. Propodeum of Labena zerita, dorsal view; C. Propodeum of Labena pluvia, dorsal view.

FIGURE 20. A–B. A. Sternite I of Labena guanacasteca, lateral view; B. Sternite I of Labena lachryma, lateral view.

FIGURE 21. A–B. A. Ovipositor of Labena guanacasteca, lateral view. B. Ovipositor of Labena zerita, lateral view.

FIGURE 23. A–B. A. Schematic drawing of hind coxa of Labena fiorii, ventral view (Adapted from Graf & Marzagão 1999); B. Schematic drawing of hind coxa of Labena fusca sp. nov., ventral view.

FIGURE 24. A–B. A. Propodeum of Labena espinita, dorsal view; B. Propodeum of Labena polemica, dorsal view.

FIGURE 25. A–B. A. Tergite I of Labena espinita, dorsal view; B. Tergite I of Labena polemica, dorsal view.

FIGURE 26. A. Illustrative drawing of mesosoma of Labena fusca sp. nov., lateral view; B. Illustrative drawing of mesosoma of Labena marginata, lateral view (Adapted from González-Moreno et al. 2015).