Research Article |
Corresponding author: Bruno Massa ( bruno.massa@unipa.it ) Academic editor: Edward Baker
© 2015 Bruno Massa.
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:
Massa B (2015) Taxonomy and distribution of some katydids (Orthoptera Tettigoniidae) from tropical Africa. ZooKeys 524: 17-44. https://doi.org/10.3897/zookeys.524.5990
|
Results of the study of specimens collected in tropical Africa and preserved in different European collections and museums are reported and extensively illustrated. The following three new species are described: Horatosphaga aethiopica sp. n., Dapanera occulta sp. n. and Cestromoecha laeglae sp. n. In addition, new diagnostic characters or distributional data for Ruspolia differens (Serville, 1838), Thyridorhoptrum senegalense Krauss, 1877, Horatosphaga leggei (Kirby, 1909), Horatosphaga linearis (Rehn, 1910), Preussia lobatipes Karsch, 1890 and Dapanera eidmanni Ebner, 1943 are reported. Finally, Symmetropleura plana (Walker, 1869) is proposed to be transferred to the genus Symmetrokarschia Massa, 2015, Conocephalus carbonarius (Redtenbacher, 1891) to the genus Thyridorhoptrum Rehn & Hebard, 1915; the genus Gonatoxia Karsch, 1889 is proposed to be synonymized with Dapanera Karsch, 1889.
Distribution, taxonomy, tropical Africa, new species, synonymies
The present paper is the result of the study carried out on material collected in tropical Africa by different collectors and preserved in various museums; it follows other three papers on the same subject (
Series of tropical African specimens kindly obtained from Philippe Moretto were studied and identified; further specimens were examined in the below cited museums or loaned from them.
BMCP Bruno Massa Collection, University of Palermo;
ISAM Iziko South African Museum, Cape Town;
MfN Museum für Naturkunde, Berlin;
MNCN Museo Nacional de Ciencias Naturales, Madrid;
MRT Museo Regionale di Storia Naturale, Terrasini (Palermo);
MSNG Museo Civico di Storia Naturale ‘G.Doria’, Genoa;
MZR Museo di Zoologia Università La Sapienza, Rome.
Some specimens were photographed with a Nikon Coolpix 4500 digital camera, mounted on a Wild M5 Stereomicroscope or Leika MZ75, and photos were integrated using the freeware CombineZP (
Seychelles, Silhouette Is. 27.VI-3.VII.1988, F.A. Repetti (1♂) (
Angola, Ghana, Ivory Coast, Central African Republic, Zaire, Rwanda, Kenya, Uganda, Tanzania, Rhodesia, Zanzibar, Mauritius, Madagascar (
Ruspolia differens is a very widespread species throughout tropical Africa, including also some islands of the Indian Ocean. Its presence in the Seychelles archipelago is possibly explained as a passive importation.
Ivory Coast, Tuba, Biémasso 7-11.VII.2014 (UV), P. Moretto (1♀); Ivory Coast, Tuba, Biémasso forest 7-11.VII.2014, P. Moretto (1♀); Ivory Coast, Man, Mt. Tonkoui (1200 m) 24-27.XI.2014 (UV), P. Moretto (1♀); Burkina Faso, Borolo, Ft. Sorobouli 1-4.VII.2013 (UV), P. Moretto (1♀) (BMCP).
The specimens above listed have 1 spine on outer genicular lobe of fore femora and on inner and outer genicular lobes of hind femora.
Ivory Coast, Man, Mt. Tonkoui (1200 m) 7°26'58.46"N, 7°39'01.14"W 1–2.VII.2014 (UV), P. Moretto (1♂, 1♀); Ivory Coast, Man, Mt. Tonkoui (1200 m) 28.VI-1.VII.2014 (UV), P. Moretto (5♂, 4♀); Ivory Coast, Man, Mt. Tonkoui (1200 m) 24–27.XI.2014 (UV), P. Moretto (2♂, 3♀); Ivory Coast, Korhogo Village (347 m) 9°25'07.02"N, 5°36'59.41"W 13–15.VII.2014 (UV), P. Moretto (1♂) (BMCP).
When
Brown with green parts, with a clear darkish stripe on head and pronotum, continuing on fore wings. Frons green, hind legs with darkish markings in the distal parts of femora and basal parts of tibiae, in some specimens darkish outer face of hind femora (Figs
See Table
Measurements of Thyridorhoptrum carbonarium comb. n. compared with the two forms (large- and small-mirror) of T. senegalense and T. baileyi (after
Species | Total length | Pronotum length | Length of hind femora | Length of tegmina | Length of ovipositor |
---|---|---|---|---|---|
T. senegalense large mirror |
27.6–40.0 (♂) 34.0–45.9 (♀) |
4.2–5.8 (♂) 4.0–5.6 (♀) |
14.5–19.5 (♂) 15.6–22.3 (♀) |
21.0–31.0 (♂) 25.1–35.9 (♀) |
9.9–12.1 |
T. senegalense small mirror |
28.0–31.9 (♂) 34.1–41.8 (♀) |
4.7–5.5 (♂) 4.6–5.7 (♀) |
15.8–17.9 (♂) 18.1–22.1 (♀) |
19.4–25.2 (♂) 25.6–33.0 (♀) |
11.2–14.1 |
T. baileyi large mirror |
29.2–43.2 (♂) 33.6–41.9 (♀) |
4.1–6.0 (♂) 4.0–5.0 (♀) |
13.7–19.4 (♂) 16.1–19.9 (♀) |
24.1–34.6 (♂) 26.6–33.6 (♀) |
8.8–10.7 |
T. baileyi small mirror |
20.4–34.9 (♂) 30.5–37.3 (♀) |
4.2–5.4 (♂) 4.8–5.6 (♀) |
13.6–19.6 (♂) 18.1–21.6 (♀) |
14.1–27.0 (♂) 21.1–27.4 (♀) |
12.0–13.9 |
T. carbonarium comb. n. | 13.5–15.0 (14.0) (♂) 16.0–18.5 (17.3) (♀) |
3.7–4.4 (4.1) (♂) 4.1–4.5 (4.3) (♀) |
14.0–15.8 (15.2) (♂) 16.2–18.2 (17.5) (♀) |
7.4–8.5 (8.0) (♂) 3.2–3.6 (3.4) (♀) |
8.7–9.7 (9.2) |
No brachypterous species of Thyridorhoptrum are known. Both T. senegalense and T. baileyi are long-winged. The mirror of male right tegmen of T. carbonarium is similar to that of the small mirror form of T. senegalense, while in T. baileyi is more triangular. The stridulatory files are differently shaped in the other two species (see
According to
According to
Twenty-nine species are currently listed within the genus Horatosphaga, of which three have been described by
Characters of Altihoratosphaga are round tegmina with reduced venation and scattered black spots (except for A. nomima), vestigial alae, shape of pronotum verrucose in most species, and emarginate tenth abdominal tergite (only found similarly in the fully winged Horatosphaga concava Ragge, 1960). Females may be recognized by their slender, long, and slightly upcurved ovipositor. Both sexes in species of Altihoratosphaga are rather plump and dark green in colour, with rounded broad wings lacking web-like venation, whereas typical Horatosphaga are more slender, especially the males, and are mostly light green in colour, with more elongated wings, and with web-like venation in the male forewings. Horatosphaga is a very heterogeneous genus, with variable characters among species (e.g.: length of wings, sexual dimorphism, ovipositor shape, etc.), and following
Democratic Republic of Congo, Goma 3.I.1967, T. De Stefani (1♂); same data 11–12.XII.1967 (2♂); same data 21.XII.1967 (2♂); same data 25.XII.1967 (1♂); same data 29.XII.1967 (1♂); same data 31.XII.1967 (1♂); Democratic Republic of Congo, Bukavu 7.VIII.1967, T. De Stefani (1♂); same data 6.III.1969 (1♂); Democratic Republic of Congo, Mt. Kanzi (2000 m) 22.III.1970, T. De Stefani (1♂) (MRT).
The right tegmina of specimens listed (both males and females) (Fig.
According to
Democratic Republic of Congo, Bukavu 28.III.1969, T. De Stefani (1♀); 10 Km N-NW Bukavu 3.VIII.1970, T. De Stefani (1♀) (MRT).
The female of this species is well characterized by the venation of the right tegmen (Fig.
Ethiopia, Omo river, El Dire 5°06'21.45"N, 36°51'08.77"E (950 m) 21.V.1939 (Expedition E. Zavattari) (♂ holotype, ♀ allotype, ♂ paratype); Ethiopia, Omo river, El Dire (950 m) 19.V.1939 (Expedition E. Zavattari) (♀ paratype); Ethiopia, Omo river, Calam 4°41'20.08"N, 35°39'58.46"E (370 m) 14.VIII.1939 (Expedition E. Zavattari) (♀ paratype)) (MZR).
Yellowish (alive specimens may show different colour) (Figs
Male. Head and antennae: fastigium of vertex very narrow, furrowed above, separated from the tuberculated fastigium of frons. Eyes rounded, well projecting. Legs long. Fore coxae unarmed. Fore tibiae furrowed on upper margin, distinctly widening above tympanum, which is closed on inner and on outer sides, tympanic auricles inflated. Fore femora unarmed, fore tibiae with 11 spines plus 1 spur on inner and outer ventral margins, 1 spur on inner and outer dorsal margins, mid femora unarmed, mid tibiae with 14 spines on inner and outer ventral margins, plus 1 spur on each side and 1 spur on both sides of dorsal margins, hind femora unarmed, hind tibiae with many spines on ventral and dorsal margins and 3 spurs on each side. Thorax: pronotum little narrowing anteriorly, little raised posteriorly, anterior margin straight, posterior margin rounded, humeral sinus absent, lobes of pronotum rounded and low. Tegmina shorter than abdomen, with pointed apices, their web-like venation very simple, cross-veins of area MA are arranged in a parallel fashion, a bit arcuate in inner part (Fig.
Female. As the male, but tegmina reduced to two small overlapping scales, not exceeding first abdominal tergite, but showing a residual web-like venation (Fig.
See Table
Measurements of Horatosphaga aethiopica sp. n. and the related three species H. ruspolii, H. vicina and H. diminuta (after
Species | Total length | Pronotum length | Length of hind femora | Length of tegmina | Length of ovipositor |
---|---|---|---|---|---|
H. ruspolii | 37.7–44.7 (♂) 25.0–26.6 (♀) |
4.7–5.7 (♂) 5.9 (♀) |
24.7–28.4 (♂) 29.3 (♀) |
29.4–35.2 (♂) 17.9–19.0 (♀) |
9.8–10.3 |
H. vicina | 32.0–35.2 (♂) 23.5–27.0 (♀) |
6.9–7.1 (♂) 7.2–7.4 (♀) |
29.2–31.4 (♂) 25.4 (♀) |
25.0–26.9 (♂) 14.8–17.0 (♀) |
13.3 |
H. diminuta | 26.3–32.0 (♂) 20.5–26.1 (♀) |
4.7–6.1 (♂) 5.6–6.6 (♀) |
22.7–28.2 (♂) 23.4–27.8 (♀) |
18.9–25.7 (♂) 13.3–17.8 (♀) |
9.8–10.8 |
H. aethiopica | 20.8–22.1 (♂) 20.5–22.0 (♀) |
4.7–4.8 (♂) 5.0–5.5 (♀) |
19.5–20.0 (♂) 21.3–21.5 (♀) |
11.6–12.0 (♂) 3.1–3.2 (♀) |
8.2–9.1 |
Concerning the affinities between this and related species, there are only three Horatosphaga with the male having the tenth abdominal tergite greatly enlarged and completely concealing the supra-anal plate, namely H. ruspolii (Shulthess, 1898), H. diminuta (Chopard, 1954) and H. vicina (Chopard, 1954), all described from Kenya. H. ruspolii has fully developed wings, while the other two have reduced fore wings and rudimentary hind wings. According to
The Latin name aethiopica is a female adjective meaning “living in Ethiopia”.
In 1939, between March and September,
South Africa, Kwa Zulu-Natal, Nhandla Forest, I.1937 (2♂) (ISAM).
Characters of the genus Symmetropleura are: fastigium of vertex triangular and sulcate; pronotum disc flat, with lateral excisions; tegmina wide with rounded hind margin or narrow with straight hind margin; fore and mid femora with ventral inner spines, hind femora with double row of ventral spines. Fore and mid tibiae dorsally unarmed or with some spinules; cerci long, in-curved and pointed; male sub-genital plate short with rounded posterior margin or (in S. africana) long with triangular apex; styli absent; ovipositor longer than pronotum, not much curved, sharp, with upper and lower apices serrate; female sub-genital plate triangular, just concave. In the description
Characters of S. plana are testaceous-green, smooth, rather stout; head nearly as broad as the pronotum, with a short keel between eyes; front erect. Fastigium of vertex compressed, narrower than first antennal segment, sulcate above (Fig.
Differences from S. africana are the absence of evident lateral carinae on metazona of pronotum, narrow tegmina, and fore and mid tibiae with 3 spurs. Considering the high variability of some characters found in other genera of African Phaneropterinae, it seems reasonable to consider also S. plana as belonging to the genus Symmetrokarschia, and to exclude the genus Symmetropleura definitively from the African fauna.
Cameroon, Barombi Station (holotype ♀) (
Preussia lobatipes was described from one female from Barombi Station (Cameroon) and considered by the author as being related to Symmetropleura africana (see above); the male was described one year later from the same locality (
Karsch, 1889. Berlin Ent. Z. 32: 423, 441
The genus Dapanera was erected by
Somalia (1♀) (
Dapanera maculata has very stout styli, stout cerci (Fig.
Ivory Coast, Man, Mt. Tonkoui (1200 m) 1-4.VII.2014 (UV trap), P. Moretto (1♂) (BMCP).
Described from Bioko, Fernando Poo (Equatorial Guinea) (
Central African Republic, Dzanga-Ndoki National Park, Ndoki, Lake 1, UV trap 1, 02°28'40.5N, 016°13'02.6E, 31.I.-2.II.2012, P. Moretto (♂ holotype) (
Yellow-green. Femora yellow with or without longitudinal brown stripe on outer side.
Male. Medium sized. Head and antennae: fastigium of vertex narrow, furrowed above, separated from fastigium of frons that is tuberculated. Eyes rounded, well projecting (Fig.
Males. Body length: 21.6–24.1; pronotum length: 5.5–5.6; pronotum height: 4.6–4.8; hind femur: 18.7–20.8; tegmina: 32.9–34.9.
Dapanera occulta sp. n. is mainly characterized by its cerci that in the other species of the genus Dapanera are stout and never sinuous; in addition, the styli are stout and short, while in D. genuteres and D. eidmanni they are slender and longer (Figs
Female. Unknown.
From Latin (occulta = hidden), female adjective; the series of specimens remained unidentified and hidden in a box containing long series of D. irregularis and D. genuteres collected in the same localities during the same expedition (see
Ivory Coast, Tuba, Biémasso (441 m), 8°04'00.09"N, 7°32'59.96"W (UV trap) 9.VII.2014, P. Moretto (♂ holotype) (
The genus Cestromoecha Karsch, 1893 is related to Poreuomena Brunner von Wattenwyl, 1878, which also lives in central-western Africa and differs from it chiefly in the shape of the male tenth tergite, being slightly bilobate or rounded, in the male sub-genital plate, being deeply bilobate, and in the shape of the cerci. Styli are absent. Five species are known, C. crassipes (Karsch, 1890), C. tenuipes (Karsch, 1890), C. mundamensis Karsch, 1896, C. longicerca Massa, 2013 and C. magnicerca Massa, 2013. Here a sixth species is described.
Brown or green, stridulatory area of left tegmen and area below it black. Small black spots are present on posterior margins of tegmina. Two longitudinal parallel dark lines are present on outer surface of hind femora.
Male. Diagnostic characters of the genus. Eyes round (Fig.
Female. As male, but without blackish markings and with only brown spots (Fig.
Males. Body length: 18.5–19.4; pronotum length: 4.0–4.2; pronotum height: 3.4–3.6; hind femur: 18.2–20.7; tegmina: 26.4–27.5. Female. Body length: 21.7; pronotum length: 4.0; pronotum height: 3.4; hind femur: 20.8; tegmina: 29.4; ovipositor: 6.1.
C. laeglae sp. n. is related to C. magnicerca. The cerci of the male are stout, long and in-curved, with the basal part rounded and the apical part flattened and pointed; a wide flattened inner spine arises from its middle; in C. magnicerca the cerci have trifid apices. The sub-genital plate is concave, but not long, with parallel processes, very similar to those of C. magnicerca. The stridulatory file of C. laeglae sp. n. is also similar to that of C. magnicerca with distal part with less and more widely spaced teeth than the proximal part (see
Laegla is the nickname of Giovanna Varrica, to whom this species is dedicated.
This research received support from the Synthesys Project, which is financed by European Community Research Infrastructure Action under the FP7 “Capacities” Programme at the Museo Nacional de Ciencias Naturales of Madrid (CSIC) (2013) and at the Naturkundemuseum of Berlin (2014). I am especially indebted to Mercedes Paris and Josefina Cabarga (Museo Nacional de Ciencias Naturales of Madrid), Michael Ohl (Museum für Naturkunde of Berlin), Roberto Poggi, Maria Luisa Tavano and Giuliano Doria (Museo Civico di Storia Naturale ‘G. Doria’ of Genoa), Aisha Mayekiso (Iziko Museums of South Africa), Emanuele Piattella (Museo di Zoologia Università La Sapienza, Rome) and Emanuela Palmisano (Museo Regionale di Palazzo D’Aumale, Terrasini, Palermo) who facilitated the study of specimens preserved in their museums. I also thank very much Philippe Moretto, who kindly let me to study the material collected during 2012, 2013 and 2014 in central and western African countries, and Sigfrid Ingrisch, for the advices and suggestions on a first version of the text.
Recently
Differing from what has been reported by