Research Article |
Corresponding author: Hans-Joachim Jacobs ( jacobs.hym@gmx.de ) Academic editor: Stephan M. Blank
© 2023 Hans-Joachim Jacobs.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Jacobs H-J (2023) Astata Latreille, 1796 (Hymenoptera, Astatidae) from Africa, south of the Sahara. Contributions to Entomology 73(2): 251-267. https://doi.org/10.3897/contrib.entomol.73.e107780
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Astata namibiensis sp. nov., A. rufoatra sp. nov. and A. tropicana sp. nov. from Namibia are described. An overview and a key to Astata species inhabiting Africa, south of the Sahara, is provided.
Astata namibiensis sp. nov., A. rufoatra sp. nov. und A. tropicana sp. nov. aus Namibia werden beschrieben. Eine Übersicht und ein Schlüssel zu den Arten der Gattung Astata von Afrika südlich der Sahara werden präsentiert.
Africa, Astata, Astatidae, Digger wasps, Hymenoptera, key, new species
The genus Astata Latreille, 1796 includes 84 described species worldwide (
Specimens were examined with a Bresser stereomicroscope with maximal 80× magnification and a MK-S144T ring light. Photos were taken with an USB Microscope Camera MOC-510 or with an Olympus camera U-TV1XZ mounted on a stereomicroscope SZX10 and then processed with the stacking programme COMBINE ZM. Final adjustment of images and montage of plates was carried out with the software ULEAD PHOTOIMPACT X3 of COREL. In order to avoid confusion, the conventional terms scape (antennomere I), pedicel (antennomere II) and flagellum (remaining antennomeres) are not used. Antennomeres, terga and sterna are designated with Latin numbers. The classification of families follows
BMNH The Natural History Museum (London, United Kingdom)
RSA Republic of South Africa
♂ Sudan, Kordofan, Sennar (
Only holotype known, not examined.
(after
Female unknown.
Dimorpha. Holotype or syntypes ♂, Kenya, 30 mi. from Magadi Junction (BMNH).
Ethiopia • 1 ♂; Wachile env,; 1070 m alt.; 4°32'N, 39°03'E; 22.05.2015; J. Halada leg.;
Habitus. Dorsal Fig.
Female unknown.
Astata fuscistigma complex
Note. The following taxa are described in the A. fuscistigma complex:
Astata fuscistigma Cameron, 1905: Holotype or Syntypes ♂, South Africa, Eastern Cape Province, Dunbrody, 33°29'S, 25°33'E (BMNH).
Astata albopilosella Cameron, 1910. Holotype or syntypes ♂, South Africa, Transvaal, now Gauteng, Limpopo and Mpumalanga Provinces, no specific locality (TMP). ‒ Description ♀ (
Astata fuscistigma race nana Arnold, 1946. ♀, ♂, syntypes, South Africa, Western Cape Province, Mossel Bay (
Remarks. All specimens mentioned here are running to A. fuscistigma respective A. albopilosella in the keys provided by
The length of ventral setae of hindfemur is highly variable, as indicated in the descriptions of both sexes. Specimens with long ventral setae of hindfemur are characterised by distinctly longer setation of the mesosoma, as well as on tergum I and metasomal sterna. There are all transitions between specimens with short and long setation, but I cannot detect any other difference between these specimens. Males with long setae on tergum I were described as Astata albopilosella by
Species A
Material. Republic of South Africa. • 5 ♂♂, 5 ♀♀; West Cape, 5 km S Lambert’s Bay; 20.11.2002; Ma. Halada leg. • 1 ♀; West Cape, Klein Karoo, Langberg Grot riv.; 15.12.2002; Ma. Halada leg.
Species B
Material. Republic of South Africa. • 2 ♂♂; West Cape, Greyton, Riviersonderend r.; 07.11.1999; Ma. Halada leg. • 1 ♂; West Cape, 20 km N Citrusdal; 27.10.1999; Ma. Halada leg. • 1 ♂; Mpumalanga, 20 km SW Lydenbrug; 20‒21.11.2003; Ma. Halada leg. • 1 ♂, 2 ♀♀; North Cape, SW of Loriesfontein; 13.10.1999; Ma. Halada leg. • 1 ♂ North Cape; W of Calvinia; 12.10.1999; M. Halada leg. • 1 ♀; Pretoria, 5 km S Brits; 20.01.2000; J. Halada leg.
Species C
Material. Kenya. 2 ♂♂, 1 ♀; Tsavo, Voi; 23.03‒04.04.1997; Ma. Halada leg. • 1 ♂; Tsavo, Tai Hill, Wundanyi; 19‒21.11.1996; Ma. Halada leg. • 4 ♀♀; Tsavo, Tai Hill, Wundanyi; 18.03‒10.04.1997; Ma. Halada leg. • 1 ♀; Elmenteita Lake; 0°28'S, 36°16'E; 15.06.2006; E. Jendek leg.
Description male. Habitus. Dorsal Figs
Description female. Habitus. Dorsal Fig.
Ecology. Nesting in friable soils (
♀♂ syntypes, Zimbabwe, Sawmills (
No material examined.
(after
(after
♀ lectotype, India, Gujarat, Deesa; des.
Astata eremita Pulawski, 1959; ♂ holotype, Egypt, Gebel Elba (synonymised by
Ethiopia • 2 ♂♂; Oromia State, SOF Omar; 1200 m alt.; 06°54'20"N, 40°51'03"E; 20.4.2016; J. Halada leg.;
Habitus. Dorsal Fig.
Habitus. Body length 9‒10 mm. Head. Black, face with white setae. Mandible basally yellow-red, apically dark brown. Clypeal lamella tridentate. Frons and vertex dull, with large shallow punctures and dense microsculpture between them. Occiput with isolated shallow punctures, moderately shining, less developed, head behind the eyes strongly narrowed. Malar space very short, base of mandible almost touching eye margin. Antenna. Antennomere I inside with dark bristles, III about 4× as long as apically wide. Thorax. Black. Pronotal collar with transverse striae, dull. Anterior third of mesoscutum rugose punctured and with short pale setae, posterior surface with scattered strong punctures. Mesoscutellum shiny with isolated punctures, laterally and distally densely punctate. Mesopleuron inclusive epimeron and prepectus faveolate, dull; ventral part with stiff dark and backward-facing bristles. Wings. Forewings hyaline, distally darkened. Marginal cell about 3× as long as wide. Legs. Femora dark brown basally, tibiae and tarsi brown. Forebasitarsus with three long rake spines. Inner spine row of forebasitarsus continuously elongated towards apex, with fimbriae on complete length. Midbasitarsus ventrally with short spines, slightly elongated apically. Hindfemur ventrally with dark bristles, about as long as half femur diameter. Propodeum. Propodeal dorsum with white erected setae, irregularly reticulate. Stigmal area of propodeal dorsum straight. Lateral parts anterior smooth, posterior reticulate. Posterior vertical surface irregularly reticulate. Metasoma. Red. Pygidial plate brown, basally wide, apex strongly narrowed. Sterna with strong black bristles. Terga with fine reticulate microsculpture.
India, Iran (
♂ holotype or syntypes, South Africa, Eastern Cape Province, Dunbrody, 33°29'S, 25°33'E (BMNH).
Republic of South Africa: • 1 ♂; N. Cape, SW of Sprinbok; 04.11.1999; M. Halada leg.;
Habitus. Dorsal Fig.
Female unknown.
Namibia • ♀ N Inlet to Omaruru, Iver (W of Omaruru), OAD C 36; 11‒13.IV. 2000; Etr. Zabransky leg.;
Astata namibiensis sp. nov. is characterised by the red metasoma. It differs from all other known African females with red metasoma by completely black legs. From A. tropicalis, it differs by the tridentate middle clypeal lobe; from A. tropicana and A. stevensoni by the dorsal surface of propodeum with erected setae; from A. lubricata by black legs and distinctly scattered punctures on anterior surface of mesoscutum.
Habitus. Dorsal Fig.
Male unknown.
♀♂ syntypes, Zimbabwe, Sanyati Valley (
No material examined.
(after
1‒5. A. lubricata male: 1. Habitus dorsal; 2. Habitus lateral; 3. Head frontal; 4. Clypeus; 5. Antenna. 6‒9. A. flavipennis male: 6. Habitus dorsal; 7. Habitus lateral; 8. Mesoscutum; 9. Antenna. 10. A. gracilicornis female: Pygidial plate (after
(after
Dimorpha. ♀ holotype or syntypes, Malawi, Zomba (BMNH). Description ♂ (
Kenya • 3 ♂♂; Voi (Tsavo) env.; 08‒18.11.1996; Mi. Halada leg.;
Habitus. Dorsal Fig.
(after
♂ holotype or syntypes, South Africa, Cape Province, Cape of Good Hope (BMNH).
Republic of South Africa • 1 ♂; West Cape, Klein Karoo, Barrydale; 16.12.2002; Ma. Halada leg.;
Habitus. Dorsal Fig.
Female unknown.
Namibia • ♂; Khomas pr., 25 km NEE Vsakos [recte Usakos]; 21°52'S, 15°19'E; 1110 m alt.; 17.3.2014; J. Halada leg.;
Astata rufoatra sp. nov. is a member of the A. miegii group with setose dorsal surface of propodeum. From the other species of this group (A. gracilicornis, A. melanaria and A. lubricata), it is distinguished by the red and black metasoma, by limitation of dorsal surface of propodeum by a foveate carina and a granulate structure of the lateral surface of propodeum before and behind the propodeal spiracle.
Habitus. Dorsal Fig.
Female unknown.
(Astata). ♀ syntypes, Zambia, Abercorn, now Mbala (
No material examined.
(after
19‒24. A. namibiensis sp. nov. female holotype: 19. Habitus dorsal; 20. Habitus lateral; 21. Mesoscutum; 22. Head frontal; 23. Pygidial plate; 24. Mesopleuron. 25‒27. A. ruficaudata male: 25. Habitus dorsal; 26. Habitus lateral; 27. Antenna. 28‒31. A. rufitarsis male: 28. Habitus dorsal; 29. Habitus lateral; 30. Antenna; 31. Head frontal. 32‒33. A. rufoatra sp. nov. male holotype: 32. Habitus dorsal; 33. Habitus lateral.
Male unknown.
♂♀ syntypes, Zimbabwe, Bulawayo (
No material examined.
(after
(after
♀ Holotype, Zambia, Ndola (
No material examined.
(after
(after
Namibia • ♂; Gobabis, 40 km W Witvlei; 16.2.1990; Max. Schwarz leg.;
Namibia • 1 ♂; Rundu; 29.1.1993; Gusenleitner leg. • 1 ♀; 17 km W Okahandja; 19.2.1999; Max. Schwarz leg. • 1 ♀; Khomas pr., 25 km NNE Vsakos; 17.3.2014; J. Halada leg.;
Astata tropicana male is characterised by body length (11‒12 mm), glabrous propodeal dorsum, red metasoma, predominantly red legs and conspicuous darkened forewings, interior concave midcoxa, distinctive flat tyloids on antennomeres V‒XI and a short and dense metasomal hairbrush. It differs from the closest similar species A. stevensoni by a shiny mesoscutum without transverse rugae, by a mesopleuron with scattered punctures and a very dense reticulated propodeal dorsum. From A. tropicalis and A. flavipennis, it differs by predominantly red legs.
Habitus. Dorsal Figs
The female of A. tropicana is characterised by the body length (9‒13 mm), conspicuously darkened fore- and hindwings, glabrous dorsal surface of propodeum and red legs. It differs from the most closely similar A. tropicalis by its completely smooth and shiny scutum with scattered punctures on the anterior third, the nearly completely red fore- and midfemur and the pygidial plate without longitudinal keels.
Habitus. Dorsal Fig.
34‒36. A. rufoatra sp. nov. male holotype: 34. Head frontal; 35. Clypeus; 36. Antenna. 37. A. stevensoni female: Pygidial plate (after
47‒49. A. tropicana sp. nov. female paratype: 47. Habitus dorsal; 48. Habitus lateral; 49. Mesoscutum. 50‒55. A. fuscistigma complex male: 50. Habitus dorsal (RSA); 51. Habitus lateral (RSA); 52. Habitus dorsal (Ethiopia); 53. Habitus lateral (Ethiopia); 54. Antenna (Ethiopia); 55. Antenna (RSA). 56‒63. A. fuscistigma complex female: 56. Habitus species A dorsal; 57. Habitus species A lateral; 58. Forebasitarsus species A; 59. Midbasitarsus species A; 60. Forebasitarsus species B; 61. Midbasitarsus species B; 62. Forebasitarsus species C; 63. Midbasitarsus species C.
Unknown: Astata enslini Maidl, 1924; A. flavipennis (R. Turner, 1917b); A. melanaria Cameron, 1905; A. rufitarsis F. Smith, 1856; A. rufoatra sp. nov.
1(1) | Metasoma red, at most apical margin of tergum V and pygidial plate brownish. Wings completely brownish (Figs |
2 |
– | Metasoma bicoloured, red basally and with black apical segments or black with red apical segments. Wings differently coloured | 6 |
2(1) | Legs black. Mesoscutum shiny, with coarse and scattered punctures, interspaces mostly wider than puncture diameter (Fig. |
A. namibiensis sp. nov. |
– | At least apex of femora, tibiae and tarsi red or ochraceous. Other characters different. Mostly larger species, 9‒12 mm | 3 |
3(2) | Mesoscutum strongly shiny, with coarse scattered punctures, interspaces distinctly wider than puncture diameter (Fig. |
A. tropicana sp. nov. |
– | Mesoscutum at least anteriorly dull, densely punctate (interspaces distinctly narrower than puncture diameter), sometimes punctures merging into striae | 4 |
4(3) | Pygidial plate broad, almost equilateral, with at least three longitudinal carinae (Fig. |
A. tropicalis Arnold, 1924 |
– | Pygidial plate narrow, without longitudinal carinae (Fig. |
5 |
5(4) | Dorsal surface of propodeum glabrous. Zimbabwe | A. stevensoni Arnold, 1924 |
– | Dorsal surface of propodeum with whitish erected setae. Ethiopia, Kenya | A. lubricata Nurse, 1903 |
6(1) | At least metasomal segment I black, segments IV‒VI red | 7 |
– | Metasomal segments I‒III completely or predominantly red | 9 |
7(6) | Metasomal segment I black, II‒VI ferruginous. Face and frons dull, transversely rugose, between the rugae with punctures. Antennomeres I‒III red. Femora black, apically red. Pygidial plate with median longitudinal carina. Zambia | A. rugifrons Arnold, 1946 |
– | Metasomal segments I‒II (III) black, V‒VII completely ferruginous. Face dull, densely punctured; frons shiny, with scattered punctures. Antennomeres I‒III black. Pygidial plate without median longitudinal carina | 8 |
8(7) | Metasomal segments I‒III black, IV black and ferruginous, V‒VI ferruginous. Frons and anterior half of mesoscutum with stiff black bristles, on mesoscutum mixed with grey setae. Femora black. Malawi | A. ruficaudata (Turner, 1917) |
– | Metasomal segments I‒II black, anterior more or less pale reddish. Head and mesosoma with normal white setae. Femora red apically. Zimbabwe | A. obscura Arnold, 19324 |
9(6) | Dorsal surface of propodeum with white setae. Tegula yellow. Pygidial plate very narrow, lateral margins strongly concave (Fig. |
A. gracilicornis Arnold, 1924 |
– | Dorsal surface of propodeum glabrous. Tegula black. Pygidial plate normal, lateral margins slightly concave. Legs black. Frons shiny, with small and dense punctures. Mesoscutum with dense punctures in the anterior half, more scattered posterior | 10 |
10(9) | Forebasitarsus longer, inner surface with 15‒20 spines; 6‒7 basal spines long, distal ones distinctly shorter and almost equal length, basal third with white fimbriae (Fig. |
A. fuscistigma complex, A |
– | Forebasitarsus shorter, inner surface with 8‒12 spines, distal ones only slightly shorter than the basal spines; basal half with white fimbriae (Figs |
11 |
11(10) | Stigmal area of propodeal dorsum rounded. RSA | A. fuscistigma complex, B |
– | Stigmal area of propodeal dorsum obtuse-angled. Kenya | A. fuscistigma complex, C |
Unknown: Astata namibiensis sp. nov., A. rugifrons Arnold, 1946.
1 | Tegula and sometimes pronotal lobe yellowish. Propodeal dorsum with erect pale setae (miegii group) | 2 |
– | Tegula and pronotal lobe black. Propodeal dorsum glabrous (boops group) | 5 |
2(1) | Metasoma completely black, at most proximal segments with dark red shimmer | 3 |
– | Metasoma red and black or completely red | 4 |
3(2) | Middle clypeal lobe produced more or less into a point, narrower than distance between antennal sockets (Fig. |
A. melanaria Cameron, 1905 |
– | Middle clypeal lobe produced into a short rectangular lobe, as broad as distance between the antennal sockets. Legs dark red. Gena and occiput dull, finely rugose-punctate. Posterior margins of sterna with short black bristles. 8‒10 mm. Zimbabwe | A. gracilicornis Arnold, 1924 |
4(2) | Metasoma red, except dark spot on the declivity of tergum I. Pronotal lobe and tegula pale yellow. Legs red. Middle clypeal lobe short and rectangular, nearly as broad as distance between the antennal sockets (Fig. |
A. lubricata Nurse, 1903 |
– | Metasomal segments I‒III predominantly red, IV‒VII black. Pronotal lobe black. Legs black. Middle clypeal lobe more or less tapered, distinctly narrower than distance between the antennal sockets (Fig. |
A. rufoatra sp. nov. |
5(1) | Metasomal segments IV‒VI black | 6 |
– | Metasomal segments IV‒VI reddish | 7 |
6(5) | Metasoma completely black. Hindfemur flattened ventrally in basal half (Fig. |
A. enslini Maidl, 1924 |
– | Metasomal segments I‒III predominantly red, IV‒VI black. Hindfemur normal rounded ventrally. Midcoxa on inner surface rounded. Lateral setae of metasomal hairbrush about as long as setae on sternum II. 9 mm. RSA, Namibia, Ghana(?) | A. fuscistigma complex |
7(5) | Metasomal terga I‒II predominantly black. Minor species, 8‒9 mm | 8 |
– | Metasomal terga I‒II predominantly reddish. Major species, 10‒12 mm | 10 |
8(7) | Tergum I and sterna I‒II black, becoming slightly dark ferruginous distally; remaining segments ferruginous. Zimbabwe | A. obscura Arnold, 1932 |
– | Metasomal segments I‒III (IV) black, segments V‒VII and sometimes distal margin of IV ferruginous | 9 |
9(8) | Apex of femora, tibiae and tarsi ferruginous. Mandible broad ferruginous medially. Metasomal hairbrush with whitish setae, lateral setae 1‒1.5× as long as setae of sternum II. Median segments of antenna with bipartite tyloids, in profile widest part in the distal third (Fig. |
A. ruficaudata (Turner, 1917) |
– | Femora black, tibiae dark brown to black, tarsi brown. Mandible predominantly black, indistinctly ferruginous medially. Metasomal hairbrush with brownish setae, lateral setae about 1.5‒2× as long as setae of sternum II. Median segments of antenna with tripartite tyloids (two tubercles connected with median keel), in profile slightly convex, widest part medially (Fig. |
A. rufitarsis Smith, 1856 |
10(7) | Femora partly, tibiae and tarsi red | 11 |
– | Femora and tibiae black, tarsi sometimes ferruginous | 12 |
11(10) | Mesoscutum anterior shiny, densely punctate with distinct interspaces, never confluent into rugae (Fig. |
A. tropicana sp. nov. |
– | Mesoscutum anterior dull, punctures confluent into transverse rugae. Mesopleuron coarsely and closely reticulated-punctate. Dorsal surface of propodeum fairly shiny, evenly and widely reticulate-rugose. Zimbabwe | A. stevensoni Arnold, 1924 |
12(10) | Forewing brownish hyaline with conspicuous darker apical spot outside of veins. Antennomere III about 4.5× as long as apically wide. Mesoscutum dull, anterior densely punctate without transverse rugae (Fig. |
A. flavipennis (R. Turner, 1917) |
– | Forewing dark fuscous. Antennomere III about 3.5× as long as apically wide. Mesoscutum dull, anterior densely punctate with indistinct transverse rugae. Sternum III black. Zambia | A. tropicalis Arnold, 1924 |
The author thanks Esther Ockermüller (Linz, Austria) for the loan of material. Stephan Blank and Andrew Liston made it possible to work in the photo lab of the Senckenberg Deutsches Entomologisches Institut, Müncheberg (Germany). I thank Mandy Schäfer (Greifswald, Germany) for use of the photographic equipment of the Friedrich Löffler Institute. Andrew Liston kindly corrected the English. I am very grateful to the reviewers Michael Ohl, Christian Schmid-Egger (both Berlin, Germany), Wojciech Pulawski (San Francisco, USA) and Stephan Blank (Müncheberg, Germany) for critical reading of the manuscript and valuable corrections and hints.