Lanista annulicornis (Walker, 1869)

Naskrecki, Piotr & Guta, Ricardo, 2019, Katydids (Orthoptera: Tettigoniidae) of Gorongosa National Park and Central Mozambique, Zootaxa 4682 (1), pp. 1-119: 23-24

publication ID

https://doi.org/10.11646/zootaxa.4682.1.1

publication LSID

lsid:zoobank.org:pub:430B98EF-BFCB-4608-A562-DEFA9539C8B2

DOI

http://doi.org/10.5281/zenodo.5629465

persistent identifier

http://treatment.plazi.org/id/03D8878E-FC67-D92C-CCFE-52B0FE69321B

treatment provided by

Plazi

scientific name

Lanista annulicornis (Walker, 1869)
status

 

Lanista annulicornis (Walker, 1869)  

http://lsid.speciesfile.org/urn:lsid: Orthoptera   .speciesfile.org:TaxonName:16012

( Figs. 9 View FIGURE 9 A–C, 10A, B, 46J–L)

Conocephalus annulicornis Walker 1869: 312   .

Diagnostic remarks. Among Mozambican katydids L. annulicornis   is immediately recognizable by the combination of entirely black face and large fastigium of vertex that is about as long as half of the pronotum ( Fig. 9A View FIGURE 9 ). Only the genus Afroagraecia   has similarly dark markings on the face but lacks the strongly enlarged fastigium. Unlike species of the closely related genera Pseudorhynchus   and Ruspolia   that display extensive color polymorphism, only brown color morphs are known in this species in both nymphs and adults ( Figs. 9B, C View FIGURE 9 ).

Distribution and natural history. L. annulicornis   is known only from Limpopo and KwaZulu Natal provinces in South Africa, and Sofala Province in Mozambique ( Chopard 1935). It is likely, however, that the distribution of this species extends further north in Mozambique. These katydids are found in savanna and woodland habitats covered with tall, robust grass species, such as Pennisetum purpureum Schumach   and Setaria megaphylla (Steud.) T. Durand & Schinz. They   feed on grass seeds and flowers, in the process accumulating large amounts of fatty tissue in their abdomen, a characteristic shared with other species of Lanista   and Pseudorhynchus   , which allows them to survive for long periods without feeding (the holotype of L. africana   carries a note “Lived 18 months without food.) For this reason, L. annulicornis   is one of the few katydid species found frequently at the peak of the dry season when food availability is limited. Additionally, based on the fact that adults are found throughout the year, while nymphs are seen only during the rainy months (December to April), it is possible that adults survive multiple seasons. In Gorongosa   this species is found from the lowlands up to ~ 900 m a.s.l.

Bioacoustics. The call of L. annulicornis   consists a series of short, two-impulse echemes (echeme duration 0.089 – 0.154 s; n=9), with peak frequency at 7.8 kHz, thus easily perceived by the human ear. Males also produce loud defensive stridulation if captured, similar in its characteristics to the advertisement call ( Figs. 46 View FIGURE 46 J–L).

Measurements (3 males, 2 females). —body w/wings: male 54–56 (54.71.2), female 51–54 (52.52.1); body w/o wings: male 39–40 (39.7.6), female 33–39 (364.2); pronotum: male 11–12 (11.7.6), female 10–11 (10.5.7); tegmen: male 37–39 (37.71.2), female 35–37 (361.4); hind femur: male 15–18 (16.31.5), female 16–17 (16.5.7); ovipositor: 13–15 (141.4) mm.

Material examined (30 specimens). Republic of South Africa: Port Natal (= Durban ), (2951’S, 311’0’’E) -male (holotype) ( BMNH)   ; Mozambique: Manica, Sussundenga, Nhahomba Ranger Station, Mussapa , elev. 606 m (-19.585799, 33.084969), 26.xi.–2.xii.2018, coll. P. Naskrecki & M. Tomás— 1 female, 1 male GoogleMaps   ; Sofala, Gorongosa   , GNP, Chitengo , (-18.97786, 34.35123), 19–20.vi.2015, coll. Jen Guyton— 1 female GoogleMaps   ; GNP, Bela Vista ranger outpost, elev. 26 m (-18.69470, 34.20853), 5–12.v.2015, coll. P. Naskrecki— 1 male ( EOWL) GoogleMaps   ; GNP, Murombodzi Waterfall, nr. Mt. Gorongosa   , elev. 842 m (-18.483361, 34.042944), 19.v.2013, coll. P. Naskrecki—1 nymph female ( MCZ) GoogleMaps   ; same locality, 21.vii.2015, coll. P. Naskrecki & M. Prager— 1 male GoogleMaps   ; GNP, Picada 1, nr. big pan, elev. 20 m (- 18.95101, 34.37322), 20.xii.2016, coll. P. Naskrecki & R. Guta— 1 female GoogleMaps   ; Gorongosa   Dist., Bela Vista, machamba near Nharicenguere river , (-18.6963, 34.207467), 8–12.v.2015, coll. R. Guta— 2 males GoogleMaps   ; Between Bunga camp and Vunduzi river , elev. 86 m (-18.60709, 34.34178), 24.iv.–5.v.2015, coll. R. Guta— 1 female GoogleMaps   ; GNP, Chitengo , elev. 38 m (-18.978808, 34.352606), 5–9.v.2014, coll. R. Guta— 1 male ( EOWL) GoogleMaps   ; Claud’s Waterfall campsite ( Site 3), elev. 94 m (-19.03011, 34.67592), 1–6.v.2013, coll. P. Naskrecki— 1 male ( MCZ) GoogleMaps   ; Wilson Laboratory, GNP, Chitengo , (-18.97775, 34.351333), 1–31.viii.2014, coll. R. Guta— 1 male ( UEMM) GoogleMaps   ; same locality, 1–30.ix.2014, coll. R. Guta & T. Massad— 1 male ( EOWL) GoogleMaps   ; GNP, Community Education Center ( CEC)   , elev. 129 m (-18.953639, 34.177111), 18–22.vi.2014, coll. G. Daniel, I. Nganhane & R. Guta— 1 female ( EOWL) GoogleMaps   ; GNP, Chitengo , elev. 29 m (-18.98194, 34.35122), 9.v.–29.vi.2012, coll. P. Naskrecki— 1 male GoogleMaps   ; same locality, 6–31.v.2013, coll. P. Naskrecki— 1 female, 1 male GoogleMaps   ; GNP, on Rd. 11, elev. 22 m (-19.00469, 34.41064), 4.vi.–25.vii.2012, coll. P. Naskrecki (125)— 1 female, 1 male ( MCZ) GoogleMaps   ; Gorongosa   Distr., Chitengo , (-18.981944, 34.351222), 2–28.ii.2015, coll. R. Guta— 1 male GoogleMaps   ; Gorongosa   District, CEC to Civeta Post , elev. 96 m (-18.940333, 34.193472), 29–30.ix.2015, coll. I. Nganhane & R. Guta— 2 females ( EOWL) GoogleMaps   .

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Orthoptera

Family

Tettigoniidae

Genus

Lanista

Loc

Lanista annulicornis (Walker, 1869)

Naskrecki, Piotr & Guta, Ricardo 2019
2019
Loc

Afroagraecia

Ingrisch & Hemp 2013
2013
Loc

Ruspolia

Schultess 1898
1898
Loc

Conocephalus annulicornis

Walker 1869: 312
1869
Loc

L. annulicornis

Walker 1869
1869
Loc

Pseudorhynchus

Audinet-Serville 1838
1838