Arantia (Arantia) orthocnemis Karsch, 1890

Hemp, Claudia & Massa, Bruno, 2017, Review of the African genera Arantia Stål and Goetia Karsch (Orthoptera: Tettigoniidae: Phaneropterinae), Zootaxa 4362 (4), pp. 451-498 : 461

publication ID

https://doi.org/ 10.11646/zootaxa.4362.4.1

publication LSID

lsid:zoobank.org:pub:350690F1-97E4-4FF5-B51A-E32118F95FFF

DOI

https://doi.org/10.5281/zenodo.6001432

persistent identifier

https://treatment.plazi.org/id/C9352751-FF9B-FF86-FF4A-FC52FF02F839

treatment provided by

Plazi

scientific name

Arantia (Arantia) orthocnemis Karsch, 1890
status

 

Arantia (Arantia) orthocnemis Karsch, 1890 View in CoL ( Figs. 8 View FIGURES 8–11 , 77 View FIGURES72–84 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:464832

Karsch (1890). Entom. Nachricht., 16 (23): 357.

Type locality: CAMEROON. Barombi Station . Depository: MfN, Berlin. Kind of type: syntypes male and female.

Material examined. CAMEROON. Barombi Station, Preuss (1♂, 1♀ syntypes) . (1♂, 1♀). Mundame, L. Conradt; Cameroon, Victoria (1♀). Isanga Lobaje Eays, Jainide , X.1894, G. Tessmann (1♀) ( MfN). (1♂, 1♀) ( MNCN). Mukonje Farm, R. Rohde (1♂, 1♀) ( MSNG). Mundame (2♂). Mukonje Farm, R. Rohde (4♂, 3♀) ( RBINS). DEMOCRATIC REPUBLIC CONGO . Congo, Urw.-Mawambi 1910, Grauer (2♂) ( NMW).

Tegmina width: 9.8–11; tegmina length/width: 4.6; tegmina width/pronotum length: 1.5 ( Heller et al. 2014).

Characters. A. orthocnemis is a species of medium size (body length ♂ 31 mm, ♀ 34 mm) ( Fig. 8 View FIGURES 8–11 ). Karsch (1890) described both sexes from Barombi Station ( Cameroon). Sjöstedt (1902) recorded it from Itoki ( Cameroon), Bolívar (1906) from Fernando Póo ( Equatorial Guinea), Griffini (1908) from Mukonje Farm ( Cameroon) and Bruner (1920) from Lolodorf ( Cameroon). It has narrow tegmina with reddish or ivory to white coloured spots, and with basal black markings. Tarsi in most specimens are black. Fore femora with 5–8 inner ventral spines (1 specimen from Mundame has 5 spines on the left femur, while the right is unarmed), mid femora are unarmed, hind femora with 6 outer and 8 inner ventral spines. Male specimens are easily distinguished from other Arantia species comparing the male cerci. The bases are swollen and a sclerotized ridge stretches from the base to the apex at the inner side. Basally at the inner side of the cerci a process is present, armed with an almost circular sclerotized ridge ( Fig. 77 View FIGURES72–84 ). Styli well developed. The ovipositor has two lateral protuberances. The subgenital plate of the female is short and slightly pointed.

Affinities. Karsch (1889) and Griffini (1908) pointed out its affinity with A. hydatinoptera . A. orthocnemis has morphologically completely different male cerci while in A. hydatinoptera the male cerci are apically compressed and the tips incurved and a basal process is lacking as well as the inner sclerotized ridge. A. hydatinoptera is probably more closely related to A. leptocnemis . A. orthocnemis has almost identical male cerci as A. dentata (see above).

Distribution. Widespread in Central and Western Africa ( Cameroon, Democratic Republic Congo, Equatorial Guinea).

MfN

Museum f�r Naturkunde

MNCN

Museo Nacional de Ciencias Naturales

MSNG

Museo Civico di Storia Naturale di Genova 'Giacomo Doria'

RBINS

Royal Belgian Institute of Natural Sciences

NMW

Naturhistorisches Museum, Wien

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Orthoptera

Family

Tettigoniidae

Genus

Arantia

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