Baeus

Stevens, Nicholas B. & Austin, Andrew D., 2007, Systematics, distribution and biology of the Australian ' micro-flea' wasps, Baeus spp. (Hymenoptera: Scelionidae): parasitoids of spider eggs, Zootaxa 1499, pp. 1-45: 13-15

publication ID

http://doi.org/ 10.5281/zenodo.177085

publication LSID

lsid:zoobank.org:pub:D72B854C-7A85-446F-9041-78B9EA38CFBA

persistent identifier

http://treatment.plazi.org/id/03F5879F-5263-D136-FF68-4AC8F6AFF901

treatment provided by

Plazi

scientific name

Baeus
status

 

Key to females of Australian Baeus   spp.

Please note, because of the small size of the specimens to be identified, the minimum magnification required to view the characters used in this key is 80 x's. In addition, an eyepiece graticule is required because measurements of various characters and their states are relied upon in this key.

1. Hind femoral spine large,> 15 µm in length, clearly visible under stereo-light microscope ( Fig. 6 View FIGURE 6 C) 2

- Hind femoral spine absent or reduced (<15 µm), not readily visible under stereo-light-microscope ( Fig. 6 View FIGURE 6 D)................................................................................................................................................. 3

2 (1). Propodeal spiracle opening large, ‗ 20 µm in diameter, forming a volcanic-like cone ( Figs 14 View FIGURE 14 E & F); frontal carina reaching <0.5 distance to medial ocellus (e.g. Fig. 13 View FIGURE 13 B) ................. B. vulcanus   sp. nov.

- Propodeal spiracle not as large as above, <15 µm in diameter, not forming a volcanic-like cone ( Figs 11 View FIGURE 11 A & B); frontal carina reaching ‗ 0.5 distance to medial ocellus (e.g. Fig. 13 View FIGURE 13 D) .............................. ................................................................................................................................ B. matthewi   sp. nov.

3 (1). Posterior margin of mesoscutellum extending to, or beyond anterior margin of T 2, so propodeum not visible medio-dorsally ( Figs 14 View FIGURE 14 A –D); mesoscutellum bearing three complete transverse rows of setae ............................................................................................................................................................... 4

- Posterior margin of mesoscutellum not extending over propodeum to anterior margin of T 2, so propodeum visible medio-dorsally (e.g. Figs 12 View FIGURE 12 A –D); mesoscutellum bearing either one or two complete transverse rows of setae ........................................................................................................................ 5

4 (3). Posterior eye margin contacting hyperoccipital carina ( Figs 14 View FIGURE 14 A & B); lateral ocelli <0.5 medial ocellus diameter from eye margin; pilosity of mesoscutum and mesoscutellum of medium length (‗ 10 µm, <30 µm); eye pilosity of medium length (‗ 5 µm, <10 µm) .......... B. tropaeumusbrevis   . sp. nov.

- Posterior eye margin ‗ 0.5 medial ocellus diameter from hyperoccipital carina ( Fig. 14 View FIGURE 14 C); lateral ocelli ‗ 0.5 medial ocellus diameter from eye margin; pilosity of mesoscutum and mesoscutellum long (‗ 30 µm); eye pilosity long (‗ 10 µm) ........................................ B. tropaeumusdensus   sp. nov.

5 (3) Entire dorso-lateral propodeum scrobiculate, except for thin glabrous band along posterior margin ( Figs 7 View FIGURE 7 E & 13 A) ................................................................................................. B. scrobiculus   sp. nov.

- Dorso-lateral propodeum sculptured otherwise (e.g. Figs 12 View FIGURE 12 A –E) ....................................................... 6

6 (5). Posterior eye margin ‗ 0.5 medial ocellus diameter from hyperoccipital carina (e.g. Fig. 8 View FIGURE 8 B) .......... 7

- Posterior eye margin touching, or <0.5 medial ocellus diameter from hyperoccipital carina (e.g. Fig. 8 View FIGURE 8 C) ......................................................................................................................................................... 9

7 (6). Dorso-lateral propodeum bearing semi-circular ridge that begins near posterior margin of propodeum and extends through ventral region of propodeal spiracle before curving back to end near posterior margin of lateral propodeum ( Figs 8 View FIGURE 8 A & B, arrowed); ..................................................... B. dux   Girault

- Dorso-lateral propodeum not bearing a semi-circular ridge (e.g. Figs 8 View FIGURE 8 C & E); .................................. 8

8 (7). Pilosity of T 2 long, ‗ 30 µm; antennal process and ventral frontal carina broadly projecting> 20 µm from ventral surface of frons ( Fig. 12 View FIGURE 12 D); frontal carina extending <0.3 distance to medial ocellus .... ....................................................................................................................... B. prolatusspissus   sp. nov.

- Pilosity of T 2 shorter, <30 µm in length; antennal process and ventral frontal carina less obvious, projecting <20 µm from ventral surface of frons ( Fig. 12 View FIGURE 12 C); frontal carina extending> 0.3 distance to medial ocellus .......................................................................................................... B. ocellatus   sp. nov.

9 (6). Dorso-lateral propodeum bearing distinct crescent-shaped ridge running from ventral margin of propodeal spiracle to posterior margin of lateral propodeum ( Figs 7 View FIGURE 7 D & 9 E, arrowed) ........ B. leai Dodd  

- Dorso-lateral propodeum not bearing crescent-shaped ridge ............................................................. 10

10 (9). Lateral ocelli, viewed dorso-laterally, touching eye margin or ‗ 0.5 medial ocellus diameter from eye margin .................................................................................................................................................. 11

- Lateral ocelli, viewed dorso-laterally, much greater than 0.5, often nearly 1.0 x’s medial ocellus diameter from eye margin............................................................................................................................ 18

11 (10). Posterior ocellar line> inter-ocular distance ( Fig. 9 View FIGURE 9 F)........................................................................ 12

- Posterior ocellar line ‗ inter-ocular distance ...................................................................................... 15

12 (11). Propodeal spiracle situated close to the edge of the latero-dorsal margin of propodeum ( Fig. 13 View FIGURE 13 C, arrowed) that is clearly defined by a broad laterally projecting carina that delineates the dorsal propodeum from the lateral propodeum ( Figs 12 View FIGURE 12 C & D); T 2 pilosity mostly long (‗ 30 µm) but can be of medium length (‗ 10 µm, <30 µm) in parts; T 3 glabrous except a few setae present laterally ............. ............................................................................................................................ B. spirolimbus   sp. nov.

- Propodeal spiracle not situated close to the edge of the latero-dorsal margin of the propodeum as described above either because latero-dorsal region of propodeum is rounded or, if dorsal propodeum is delineated from the lateral propodeum by a laterally projecting carina (e.g. Fig. 10 View FIGURE 10 C), then the propodeal spiracle is distant from the latero-dorsal margin of the propodeum ( Fig. 10 View FIGURE 10 D); T 2 pilosity never long, either medium or short (<30 µm); T 3 with transverse coriarious band medially, bearing one row of setae .......................................................................................................................................... 13

13 (12). Anterior and posterior genal margins convergent medially when viewed postero-laterally .................. ................................................................................................................................... B. maryae   sp. nov.

- Anterior and posterior genal margins mostly parallel or divergent medially when viewed postero-laterally ................................................................................................................................................... 14

14 (13). Mesoscutum bearing 5 rows of setae in medial region; body generally not appearing pilose; density of pilosity of T 2 being mostly sparse (‗ 20 µm between setae of same row), some areas of moderate density (<20 &> 10 µm) may be present; dorsal region of the propodeum delineated from the lateral propodeum by a longitudinal carinae ........................................................................... B. jenningsi   sp. nov.

- Mesoscutem bearing 6 or more rows of setae in medial region; body generally quite pilose in appearance; pilosity of T 2 dense (‗ 10 µm between setae of same row) about the anterior region, but generally rest of T 2 of moderate density (<20 &> 10 µm); latero-dorsal region of propodeum rounded, not delineated from the lateral propodeum by a longitudinal carinae (e.g. Fig. 13 View FIGURE 13 B) .... B. murphyi   sp. nov.

15 (11). Eye height <0.5 head height ( Fig. 12 View FIGURE 12 B) ................................................................. B. mymyae   sp. nov.

- Eye height ‗ 0.5 head height ( Fig. 10 View FIGURE 10 A) ............................................................................................. 16

16 (15). Body not pilose in appearance; pilosity of vertex, mesoscutum and scutellum mostly sparse (‗ 20 µm between setae of same row), small areas of moderate density (<20 &> 10 µm) can be present; length of setae on vertex, mesoscutum and scutellum a mixture of short (<10) and medium length, (medium length pilosity within 10–15 µm range, not exceeding 20 µm); T 2 pilosity of similar density but length mostly short, occasionally setae of medium length do occur, randomly dispersed amongst short setae .................................................................................................................................... B. moorei   sp. nov.

- Body pilose in appearance; pilosity of vertex, mescutum and scutellum mostly of moderate density (<20 &> 10 µm), with regions of dense pilosity (‗ 10 µm) occurring; setae of medium length overall, including T 2, commonly exceeding 20 µm in length, (range being 15–25 µm) ................................ 17

17 (16). Lateral margins of mesosoma, when viewed dorsally, diverging posteriorly from one another ( Fig. 9 View FIGURE 9 B); dorsal region of propodeum delineated from the lateral propodeum by a large longitudinal carina ( Figs 7 View FIGURE 7 C, 9 A & B) ........................................................................................................ B. iqbali   sp. nov.

- Lateral margins of mesosoma, when viewed dorsally, largely parallel, or converging marginally posteriorly ( Fig. 8 View FIGURE 8 F); latero-dorsal region of propodeum rounded, not delineated from lateral propodeum by a large longitudinal carina ( Figs 7 View FIGURE 7 B, 8 E & F) ...................................................... B. hallarakeri   sp. nov.

18 (10). Anterior and posterior genal margins strongly convergent medially when viewed postero-laterally ( Fig. 4 View FIGURE 4 A); anterior genal margin in contact with ‗ 0.3 of ventral eye margin length ( Fig. 4 View FIGURE 4 A).............. .................................................................................................................................... B. arthuri   sp. nov.

- Anterior and posterior genal margins parallel or divergent when viewed postero-laterally, (e.g. 14 A); anterior genal margin in contact with> 0.4 of ventral eye margin length (e.g. 12 B) ......................... 19

19 (18). Pilosity of vertex, mesoscutum and scutellum mostly dense (‗ 10 µm), small patches of moderate density (<20 &> 10 µm) can occur; pilosity of T 2 dense in anterior region, gradating to moderate density posteriorly; T 3 bearing two complete transverse rows of setae ................ B. saliens   (Hickman)

- Pilosity of vertex, mesoscutum and scutellum mostly of moderate density (<20 &> 10 µm), small dense (‗ 10 µm) patches can occur; pilosity of T 2 mostly sparse (> 20 µm) apart from moderate density in anterior region; T 3 glabrous except for several setae laterally .................... B. glenysae   sp. nov.