Cassida inaequalis Thomson, 1858

Borowiec, Lech & Świętojańska, Jolanta, 2022, A monograph of the Afrotropical Cassidinae (Coleoptera: Chrysomelidae). Part 6. Revision of the tribe Cassidini 3, the genus Cassida L., Zootaxa 5171 (1), pp. 1-250 : 86-88

publication ID

https://doi.org/ 10.11646/zootaxa.5171.1.1

publication LSID

lsid:zoobank.org:pub:5B00C374-33B0-4433-95A0-DC9B5FFC5B0C

DOI

https://doi.org/10.5281/zenodo.6966370

persistent identifier

https://treatment.plazi.org/id/E417E526-B10A-A973-FF6C-F8190D6695A3

treatment provided by

Plazi

scientific name

Cassida inaequalis Thomson, 1858
status

 

Cassida inaequalis Thomson, 1858 View in CoL

( figs. 21 View FIGURE 21 , 63–66 View FIGURES 63–66 )

Cassida inaequalis Thomson, 1858: 231 View in CoL ; Boheman, 1862: 362; Gemminger & Harold, 1876: 3654; Spaeth, 1902: 458; 1903: 178, 1916: 41; Borowiec, 1985: 240, 1999: 257; Nummelin & Borowiec, 1991: 14.

Cassida (Cassida) inaequalis: Spaeth, 1914 b: 117 View in CoL .

Cassida marginata var. inaequalis: Spaeth, 1903: 178 View in CoL .

Cassida marginata Weise, 1898: 220 ; Spaeth, 1902: 458, 1903: 178, new synonymy.

Cassida (Cassida) inaequalis var. marginata: Spaeth, 1914 b: 117 .

Description. L: 7.05–8.50 mm, W: 5.55–6.60 mm, Lp: 2.50–2.80 mm, Wp: 4.30–5.05 mm, L/W: 1.21–1.36, Wp/ Lp: 1.65–1.90. Body oval ( fig. 46 View FIGURE 46 ).

Variable species. In typically coloured specimens dorsum reddish–brown, head, thorax and abdomen yellowish to ochraceous, antennal segments 1–7 yellow, segments 8–11 infuscate to black ( figs. 63, 64 View FIGURES 63–66 ). In some specimens thorax more or less brown to almost black, abdomen dark brown centrally surrounded by ochraceous to pale brown, legs mostly brown to almost black with paler apex of femora. In quite common aberration pronotum, elytral disc and ventrites as in typical form but explanate margin of elytra black except pale extreme margin (= ab. marginata Weise , fig. 66 View FIGURES 63–66 ), often the form with black explanate margin has black thorax and legs but abdomen pale or only slightly infuscate centrally. In all forms pronotum always unicolour, from reddish brown to brown, without pale „windows” on explanate margin and antennae always with infuscate to black distal segments. Occasionally, entire dorsum dark brown to black.

Pronotum broadly elliptical, with maximum width in the middle, anterior margin regularly convex, sides very broadly rounded, no basal corners. Disc distinctly convex thus distinctly bordered from explanate margin but without lateral lobes with small shallowly impressed area above head, sides of disc bordered from explanate margin by distinct impression. Surface of disc shiny, impunctate, sides of disc often with shallow impression. Explanate margin broad, impunctate, shiny, only in pale forms semitransparent with well visible honeycomb structure.

Base of elytra much wider than base of pronotum, humeral angles moderately protruding anterad, subangulate, lateral margin of elytra behind the humeral angle often very shallowly emarginate. Disc very convex, with deep postscutellar and principal impressions, postscutellar hump very low and obtuse but distinctly marked with broad and low H–shaped elevation and several folds behind the postscutellar elevation, always are distinct short longitudinal folds on slope on second and third interval and oblique and transverse folds behind and laterally to H–shaped elevation, sides of disc behind humeri not impressed. Interspaces more or less elevated thus entire surface of disc appears more or less irregular. Punctation moderately coarse, tends to form regular rows, but they are interrupted and disturbed by elytral sculpture, only two submarginal rows mostly complete then distance between punctures smaller than puncture diameter. Marginal row distinct, its punctures usually coarser than punctures in central rows, interspaces mostly elevated. Intervals mostly disturbed by elytral relief only submarginal interval complete. Marginal interval distinct, in humeral area broad, as wide as submarginal interval and two submarginal rows combined, behind the middle usually as wide as or slightly narrower than submarginal interval, humeral and lateral folds distinct. Explanate margin moderately broad, moderately to strongly declivous, in the widest part five times narrower than disc, surface shiny, in pale form often almost impunctate and almost regular but usually with more or less distinct punctation, smaller in pale and coarser in dark forms then surface more or less irregular, only in pale forms semitransparent with more or less visible honeycomb structure.

Eyes very large, gena as long as last palpomere. Clypeus very broad, approximately 1.8 times as wide as long. Clypeal grooves very fine but well marked, converging in triangle, clypeal plate strongly convex, its surface shiny with several very small, hairy punctures. Labrum minutely emarginate. Antennae moderately stout, segments 9–10 slightly longer than wide. Length ratio of antennal segments: 100:50:70:73:64:57:59:57:57:59:114. Segment 3 approximately 1.4 times as long as segment 2 and slightly shorter than segment 4.

Prosternum narrow in the middle, moderately expanded apically, area between coxa flat to slightly convex, shiny, without special sculpture but along sides and partly centrally with small, hairy punctures, expanded apex with globular elevation in the middle, slightly impressed laterally, surface shiny, on sides often with short impressed stripes or grooves, lateral alae along posterior margin with row of punctures, central part of expanded apex with small, hairy punctures.

Claws simple.

Distribution. Western and Central Africa from Guinea to Uganda ( fig. 22 View FIGURE 22 ).

Remarks. A member of the Cassida tosta species–group, the only species of the group which never forms mostly black aberrations, at most the explanate margin of elytra can be completely black ( fig. 66 View FIGURES 63–66 ). Cassida altiuscula differs in completely black elytra, very high elytral hump ( fig. 53 View FIGURES 51–53 ), elytral sides distinctly converging posterad, and base of elytra is the most widest in relatio to base of pronotum within the group ( figs. 51, 52 View FIGURES 51–53 ). Brown forms of C. overlaeti are similar to dark forms of C. inaequalis but differ in pronotum mostly brown with reddish anterior spots while in all forms of C. inaequalis the pronotum is uniformly reddish to reddish brown ( figs. 63. 64, 66 View FIGURES 63–66 ). Pale forms of C. tosta ( fig. 60 View FIGURES 57–62 ) are similar to C. inaequalis but differ in a higher postscutellar elevation ( fig. 59 View FIGURES 57–62 vs. 65), elytral disc behind humeral callus distinctly impressed and sculpture on slope of elytral disc higher ( figs. 69 View FIGURES 69–71 vs. 63).

Types examined. Type location of Cassida inaequalis Thomson, 1858 unknown; lectotype and paralectotype of Cassida marginata Weise, 1898 (designated by Borowiec, 1999: 257): [ CAMEROON]: Kamerun, Kraatz (ZMHU).

Other specimens examined. ANGOLA: Kwanza Norte Prov., near N’Dalatando , 22 XI 2013, 1, T. Lackner leg. ( BMNH) .

CAMEROON: Barombi St. , 1, Zeuner ( ZMHU) ; Batanga , III 1914, 2, IV 1914, 5, F.H. Hope ( CMNH) ; Bipindi , 1898, 1, G. Zenker ( ZMHU) ; Camerun , 1, Sjoestedt ( NRS) ; Dengdeng , Godje, 20 III 1914, Hildbreaed ( ZMHU) ; Edea , 6 VI 1922, 1, J.A. Reis ( CMNH) ; Efulen , XI 1912, 3, J.A. Reis ( CMNH) ; Jaunde , IV–V 1897, 1, v. Carnap ( ZMHU) ; Joh.–Albrechthöhe , 28 V–12 VI 1898, 2, 11 VII–2 VIII 1898, 2, 3–28 VIII 1898, 1, L. Conradt ( ZMHU) ; Joko , 1 ( HNHM) ; Katho–Barombi See , I 1958, 5, W. Hartwig ( MKB) ; Kribi , 1 ( MRAC) ; Lolodorf , 19 II–7 VI 1895, 5, L. Conradt ( ZMHU) ; 15 III 1919, 1, J.A. Reis ( CMNH) , III 1925, 1, A.I. Good ( CMNH) ; Mt. Kamerun , 600 m, II 1958, 1, Hartwig ( MKB) ; 5 km S Muëli , 6 II 1958, 1, H. Knorr ( SMNS) ; Mundame , 2 ( IRSN) , 1, R. Rohde ( ZMHU) ; Nkolbisson , Dept. Nyong–Sanaga, X 1963, 1, L.G. Segers ( MRAC) ; Yaunde St. , 1, v. Carnap ( ZMHU) .

DEMOCRATIC REPUBLIC OF CONGO (ZAIRE): Albert Nat. Park , Massif Ruwenzori , riv. Lume (moyenne), affl. Semliki, 1830 m, 30 VIII 1956, 1, P. Vanschuytbroeck ( MRAC) ; Albert Nat. Park , Mutsora , 1939, 4, Hackars (3 MRAC, 1 MNHW); Albert Nat. Park , Secteur Nord , riv. May ya moto, affl. g. Talya, 1280 m, 3 IX 1957, 1, P. Vanschuytbroeck ( MRAC) ; Albert Nat. Park , Secteur Nord , Molidi, affl. dr. Byangolo, 1140 m, 29 I 1957, 1, P. Vanschuytbroeck ( MRAC) ; Albert Nat. Park , r. Tungula , piste Mwenda, Kafuka, 1000 m, 27 III 1947, 1, J. de Wilde ( MRAC) ; Bambesa , III 1937, 1, 24 IV 1937, 1, J. Vrydagh ( MRAC) ; Beni, 1, Lt. Bonnevie ( MRAC) ; Bas Uele, Buta, 1926, 1, F. Joseph ( MRAC) ; Bas Uele , Djamba, 17–25 XII 1924, 1, H. Schouteden ( MRAC) ; Bas Uele , Koteli, 1–21 I 1925, 1, H. Schouteden ( MRAC) ; Bokoro , 20 III 1915, 1, R. Mayné ( MRAC) ; Bomboma , 20 VII 1935, 1, A. Bal ( MRAC) ; Djombo , 25 X 1912, 1, R. Mayné ( MRAC) ; Elisabethville, 1935, 1, Richard ( MRAC) ; Equateur, Bokote, 1922, 1, Hulstaert ( MRAC) ; Kasai, Kondue, 6, E. Luja ( MRAC) ; Kindu , XI 1913, 1, L. Burgeon ( MRAC) ; Kivu , vall. de la Ruzizi, Kanambo, III 1959, 3, P.L.G. Benoit (2 MRAC, 1 MNHW); Kwango–Ngowa, 15 X 1937, 1, J. Martens ( IRSN) ; Libenge Mawuya , 14 IX 1947, 1, R. Cremer & M. Neuman ( IRSN) ; Mandungu , 25 XI 1912, 1, R. Mayné ( MRAC) ; Maniema , Kindu, 26 III 1918, 1, R. Mayné ( MRAC) ; Mondombe , X 1912, 1, R. Mayné ( MRAC) ; Mongbwalu , VII 1938, 1, Mme Scheitz ( MRAC) , IX 1939, 1, Mme Lepersonne ( MRAC) ; Sankuru , Komi, I 1930, 1, 2 I 1930, 1, 8 III 1930, 1, J. Ghesquière ( MRAC) ; Stanleyville, n. Kilo, 1, L. Burgeon ( MRAC) ; Stanleyville , Ongoka, riv. Lowa, IV–IX 1952, 1, J. Pantos ( MRAC) ; Uele , Amadi, 31 VII 1914, 1, Rodhain ( MRAC) ; Ubangi , Binga, 5–12 III 1932, 2, 8 III 1932, 1, 12 III 1932, 4, H.J. Brédo ( MRAC, MNHW) ; Wamba, 1936, 1, Degotte ( MRAC) .

EQUATORIAL GUINEA: Mongo , 1946–1948, 1, J. Palau ( MRAC); Nkolentangan, XI 1907 – V 1908, 3, G. Tesmann ( ZMHU) .

GABON: Gabon, 1 (IRSN); Ivinde, 1 (IRSN); Iviroo Haut, Cape Cottes, 1906, 1, J. Gravot (MNHN); between Lambarene and sea coast, 1901, E. Havg (MNHN).

GUINEA: Guinea, 1 (ZMHU).

REPUBLIC OF CENTRAL AFRICA: Fort Sibut, Oubanghi–Chari, 1 (IRSN); Nola, 1 (IRSN); Lobaye River, Congo Francaise, 1 (NMP).

RWANDA: Cyamudongo F., 2°32’S / 28°58E, 1750 m, 20 III 2007, 1, T. Wagner ( TW) GoogleMaps .

TANZANIA: Victoria Lake, Ukerewe Is., 3, Conrads (ZMHU).

TOGO: Amedzowe, 1 (ZMHU).

UGANDA: Durro Forest, Toro , 4.400 –4.500 ft., 25–29 X 1911, 4, S. A. Neave ( BMNH) GoogleMaps ; Fort Portal , 15 km E Sebitoli, 1400 m, 23 XI–5 XII 1994, 1, M. Snižek ( MS) ; south of Lake George , 3.200 –3.400 ft., 17–19 X 1911, 1, S. A. Neave ( BMNH) GoogleMaps ; Kalinzu Forest, Mpungu , 1200–1350 m, VI 1972, 1, H. Gřnget ( ZMC) ; Kisubi , 17 X 1971, 1, H. Gřnget ( ZMC) ; Mabira Forest, Chagwe , 3500–3800 ft., 16–25 VI 1911, 1, S.A. Neave ( BMNH) ; Toro Distr., Ft. Portal, Kibale Forest , V–IX 1992, 1 ( JM) ; Western Ankole , 4.500 –5.000 ft., 10–14 X 1911, 2, S. A. Neave ( BMNH) GoogleMaps .

ZMHU

Zoologisches Museum der Humboldt Universitaet

CMNH

The Cleveland Museum of Natural History

NRS

Naturhistoriska Riksmuseet

HNHM

Hungarian Natural History Museum (Termeszettudomanyi Muzeum)

MRAC

Musée Royal de l’Afrique Centrale

SMNS

Staatliches Museum fuer Naturkund Stuttgart

IRSN

Institut Royal des Sciences Naturelles de Belgique

MS

Herbarium Messanaensis, Università di Messina

ZMC

Deptment of Biology, Zunyi Medical College

JM

Jura Museum, Eichstatt

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Chrysomelidae

Genus

Cassida

Loc

Cassida inaequalis Thomson, 1858

Borowiec, Lech & Świętojańska, Jolanta 2022
2022
Loc

Cassida (Cassida) inaequalis: Spaeth, 1914 b: 117

Spaeth, F. 1914: 117
1914
Loc

Cassida (Cassida) inaequalis var. marginata:

Spaeth, F. 1914: 117
1914
Loc

Cassida marginata var. inaequalis:

Spaeth, F. 1903: 178
1903
Loc

Cassida marginata

Spaeth, F. 1903: 178
Spaeth, F. 1902: 458
Weise, J. 1898: 220
1898
Loc

Cassida inaequalis

Borowiec, L. 1999: 257
Nummelin, M. & Borowiec, L. 1991: 14
Borowiec, L. 1985: 240
Spaeth, F. 1916: 41
Spaeth, F. 1903: 178
Spaeth, F. 1902: 458
Gemminger, M. & Harold, E. B. von 1876: 3654
Boheman, C. H. 1862: 362
Thomson, J. 1858: 231
1858
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