Stuttgarter Beiträge zur Naturkunde Serie A (Biologie)

Herausgeber:

Staatliches Museum für Naturkunde, Rosenstein 1, D-70191 Stuttgart

Stuttgarter Beitr. Naturk. 9S., 22 Abb. Stuttgart, 30. XI. 2005

The species of the African genus Mimocellus Wasmann (Coleoptera: Tenebrionidae), with descriptions of three new species!

WOLFGANG SCHAWALLER

Abstract

The species of the African genus Mimocellus Wasmann, 1904 (Coleoptera: Tenebrionidae, Lupropini) are revised. Mimocellus bremeri n.sp. (Kenya), Mimocellus girardi n.sp. (Ivory Coast) and Mimocellus wasmanni n.sp. (Congo) are added to the as yet known four species. The diagnostic characters of all species are listed and figured, a species key is provided and all faunistic data are summarized in a map. The species live in the nests of termites. The external morphology suggests that at least the adult beetles do not have a close association with the ter- mites themselves, but are probably associated only with the cultivated fungi or accumulated debris in the nests of the termites.

Keywords: Coleoptera, Tenebrionidae, Lupropini, Mimocellus, Africa, new species, termi- tes.

Zusammenfassung

Die Arten der afrikanischen Gattung Mimocellus Wasmann, 1904 (Coleoptera: Tenebrio- nidae, Lupropini) werden revidiert. Mimocellus bremeri n.sp. (Kenya), Mimocellus girardi n.sp. (Elfenbeinküste) und Mimocellus wasmanni n.sp. (Congo) werden zu den bislang vier bekannten Arten hinzugefügt. Die diagnostischen Merkmale aller Arten werden aufgelistet und abgebildet, ein Bestimmungsschlüssel für die Arten wird erstellt, und alle faunistischen Daten werden in einer Karte zusammengefasst. Die Arten leben in den Nestern von Termiten. Auf Grund der äußeren Morphologie haben zumindest die erwachsenen Käfer keine nähere Assoziation mit den Termiten selbst, sondern leben wahrscheinlich nur von den gezüchteten Pilzen oder angehäuften Abfällen innerhalb der Termitennester.

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! Contributions to Tenebrionidae, no. 50. For no. 49 see Fauna of Arabia 21 (2005).

2 STUTTGARTER BEITRÄGE ZUR NATURKUNDE Ser. A, Nr. 687

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1 Introduction

The genus Mimocellus Wasmann, 1904 (type species Mimocellus trechoides Was- mann, 1904) within the tenebrionid tribe Lupropini contains as yet four species, dis- tributed exclusively in Africa south of the Sahara (WASMANN 1904, ARDOIN 1969). The species are relatively rare in the collections, and besides the original genus diag- nosis and the descriptions of the species as yet no further data are published. Initiat- ed by new findings of this genus in Kenya and South Africa, three new species are described in this paper, the diagnostic characters of all species are listed and figured, a species key is provided and all faunistic data are summarized in a map.

The species of Mimocellus are said to be termitophilous and have been found in the nests of termites (WASMANN 1904). However, from the external morphology the beetles do not have a close association with the termites themselves (no cuticular ar- mament, no excavations for appendages, no trichomes), but are associated probably only with the cultivated fungi or accumulated debris in the nests of the termites. Ter- mites are species-rich and have a high ecological plasticity in Africa (see for example VOHLAND & Deckert 2005). The striking termite mounds in the African savannahs are built by species of Macrotermes Holmgren, 1890. At least Mimocellus decellei and Mimocellus girardi n.sp. have been collected in association with the termite Macrotermes bellicosus, according to the labels. However, it is unknown if this asso- ciation holds true for all species of Mimocellus and/or to which other taxa of termites the adult beetles or (?only) their larvae have a closer association. All species of Mi- mocellus have fully developed wings and are generally collected at light, thus they leave the termite nests during night by flight, probably for dispersal.

Acronyms of depositories

HNHM Hungarian Natural History Museum, Budapest

MNHUB Museum fiir Naturkunde der Humboldt-Universitat, Berlin MRAC Musée Royal de l’Afrique Centrale, Tervuren

SMNS Staatliches Museum für Naturkunde, Stuttgart

TMSA Transvaal Museum, Pretoria

ZSM Zoologische Staatssammlung (coll. BREMER), München

Acknowledgements

Cordial thanks are due to the collection manager RurH MULLER (Pretoria) for her hospi- tality during my stays in the Transvaal Museum and for various supports during joint field work in South Africa and Namibia. Dr. Martin BAEHR (München), BERND JÄGER (Berlin), Dr. Orrö Merkr. (Budapest) and Dr. Marc DE MEYER (Tervuren) kindly loaned specimens from the collections under their care.

SCHAWALLER, SPECIES OF AFRICAN GENUS MIMOCELLUS 3

Fig. 1. Collecting plots of Mimocellus species in Africa; a few localities could not exactly be lo- calızed and are included only roughly ın the map.

2 The species

2.1 Mimocellus braunsi Wasmann, 1904 (Figs. 1-4)

Studied type-material: South Africa, Orange Free State, Bothaville, 15.11.1898, leg. Brauns, 3 holotype TMSA.

New material: None.

Diagnostic characters: Body length 4.9 mm. Dorsal side of head, pronotum and elytra shining and glabrous. Shape of antennomeres subquadrate, see Fig. 3. Shape of pronotum and elytra see Fig. 2. Propleures glabrous. Punctures of head and

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6 STUTTGARTER BEITRÄGE ZUR NATURKUNDE Ser. A, Nr. 687

pronotum of similar size, punctation on head distinctly denser than on pronotum.

Elytral stripes with visible punctures, elytral intervals slightly convex and with

somewhat smaller punctures than on pronotum. Aedeagus see Fig. 4. Distribution: South Africa.

2.2 Mimocellus bremeri n.sp. (Figs. 1, 5-7)

Holotype (8): S Kenya, Tsawo West National Park, near Kitani Lodge, 17.IV.1988, leg. A. Voynits (Hung. Sci. Africa Exp. “Teleki”), HNHM.

Paratypes: S Kenya, Tsawo [labelled Tsavo] East National Park, Buchuma, 28.X1.1997, leg. M. Snizer, 12 ZSM. Tanzania [labelled as Tanganyika], Usa River, 3900ft., 15.1X.-25.X1.1965, leg. J. SzuNyoGHy, 1 ex. HNHM (pubescens det. Kaszas). Ethiopia, Sudere (125 km SE Addis Abeba), 16.X1.1980, leg. DEMETER, 1 ex. SMNS. - Kenya [labelled as Brit. Ost-Afrika], Taru, Mombasa, without date, 1 ex. HNHM (pubescens det. Kaszap). - Kenya [labelled as Africa or.], Ikutha, without date, 1 ex. HNHM (pubescens det. Kaszas).

Etymology: Named in honour of Prof. Dr. Hans J. BREMER (Melle), who recognized this species from his collection as new.

Description: Body length 3.0-3.6 mm, unicoloured ferrugineous. Dorsal side of head, pronotum and elytra shining and with long and dense setation. Shape of an- tennomeres subquadrate, see Fig.6. Pronotum (Fig.5) cordiform with the lateral margin distinctly excavated before the hind angles, propleures glabrous. Punctures of head and anterior part of pronotum of similar size, punctures of posterior part of pronotum distinctly bigger, punctation on head slightly denser than on pronotum. Elytra with irregular punctural rows without stripes, punctures of elytral intervals only slightly smaller. Ventral side and legs without specific peculiarities. Aedeagus see Pier 7.

Diagnosis: Mimocellus bremeri n.sp. shares with M. pubescens the similar body size, the subquadrate shape of the antennomeres and the dorsal setation on head, pronotum and elytra, but can be separated by the cordiform pronotum with the lat- eral margin distinctly excavated before the hind angles (Figs.5, 14), by the elytral punctation (see species key), and by a completely different aedeagus (Figs. 7, 16). See also Mimocellus wasmanni n. sp.

2.3 Mimocellus decellei Ardoin, 1969 (Figs. 1, 8-10)

Studied type-material: Ivory Coast, Abengourou, 16.VIII.1961, leg. J. DECELLE, ? holotype MRAC.

New material: Ghana, Ashanti Region, Kwadaso, 320 m, 27.11.-12.111.1969, leg. S. EN- DRODY- YOUNGA, 30 ex. HNHM, 3 ex. TMSA. - Ivory Coast, Ayérémou II, 27.X1.1986, leg. C. GIRARD, 1 ex. ZSM, 1 ex. SMNS. - Guinea, Mt. Nimba, Gbakoré, XT1.1983, leg. C. GIRARD & M. Lamotte, 3 ex. ZSM.

Diagnostic characters: Body length 5.1-5.5 mm. Dorsal side of head, prono- tum and elytra dull shagreened and glabrous. Shape of antennomeres elongate, see Fig.9. Shape of pronotum and elytra see Fig.8. Propleures with distinct setation. Punctures of head bigger than punctures of pronotum, punctation on head distinct- ly denser than on pronotum. Elytra with stripes, punctures small and not surpassing the stripes, elytral intervals slightly convex and with indistinct fine punctation. Aedeagus see Fig. 10.

Distribution: Ivory Coast (type locality); Guinea, Ghana (new records).

SCHAWALLER, SPECIES OF AFRICAN GENUS MIMOCELLUS 7

2.4 Mimocellus girardi n.sp. (Figs.1, 11-13)

Holotype (d): Ivory Coast, Ayérémou II, 27.X1.1986, leg. C. Grrarp, ZSM.

Etymology: Named in honour of Dr. CLAUDE GIRARD (Paris), collector of the holotype and specialist of termitophilous tenebrionids in Africa.

Description: Body length 5.8 mm, unicoloured ferrugineous. Dorsal side of head, pronotum and elytra shining and with long and dense setation. Shape of an- tennomeres elongate, see Fig. 12. Pronotum (Fig. 11) cordiform with the lateral mar- gin distinctly excavated before the hind angles, propleures with setation. Punctures of head bigger than punctures of pronotum, punctation on head distinctly denser than on pronotum. Elytral stripes with visible punctures, elytral intervals slightly convex and with similar punctation as on head. Ventral side and legs without specif- ic peculiarities. Aedeagus see Fig. 13.

Diagnosis: Mimocellus girardi n. sp. shares with M. decellei the similar body size and the elongate shape of the antennomeres, but can be recognized by the setation on head, pronotum and elytra, by a different elytral structure, and by a different shape of the aedeagus (Figs. 10, 13).

2.5 Mimocellus pubescens Ardoin, 1969 (Figs. 1, 14-16)

Studied type-material: Ivory Coast, Bingerville, XII.1961, leg. J. DECELLE, 3 holotype MRAC.

New material: Ivory Coast, Ayérémou II, 27.X1.1986, leg. C. Grrarp, 1 ex. ZSM. South Africa, Northern Province, Thabaphaswa Farm near Potgietersrus, 13.-14.X11.2003, leg. W. SCHAWALLER, 1 2 SMNS.

Diagnostic characters: Body length 2.5-3.8 mm. Dorsal side of head, prono- tum and elytra shining and with long and dense setation. Shape of antennomeres subquadrate, see Fig. 15. Shape of pronotum and elytra see Fig. 14. Propleures with long setation. Punctures of head and pronotum of similar size, punctation on head not denser than on pronotum. Elytra with rows of big punctures without stripes, elytral intervals slightly convex and with smaller punctures than on pronotum. Aedeagus see Fig. 16.

Remarks: The newly collected specimen from South Africa, unfortunately a fe- male, shows no distinct differences in comparison with the d holotype from the Ivory Coast apart from a somewhat bigger body size (4 2.5-3.2 mm, 2 3.8 mm). Thus I hope not to fail in assigning this finding to M. pubescens in spite of the wide- ly disjunct localities.

Distribution: Ivory Coast (type locality); northern South Africa (new record).

2.6 Mimocellus trechoides Wasmann, 1904 (Figs. 1, 17-19)

Studied type-material: None, depository unknown.

New material: Ivory Coast, 10km S N’Douci, 11.XII.1989, leg. C. Grrarp, 1 ex. ZSM. Ghana, Ashanti Region, Kwadaso, 320 m, 3.-4.11I.1969, leg. S. ENDRODY-YOUNGA, 9 ex. HNHM, 2 ex. TMSA, 1 ex. SMNS. —- SW Ethiopia, Gamu-Gofa, Konso, 1610m, 17.-23.11.1960, leg. W. RiCHTER, 1 ex. SMNS. Congo [labelled as Congo Belge], P.N.G., Mission H. de SAEGER, 29.V.1952, leg. J. VERSCHUREN, 2 ex. ZSM. NE Namibia, Bushman- land, Klein Dobe, 19.-21.11.1992, leg. M. UHLIG, 1 ex. MNHUB (trechoides det. BREMER). Kenya [labelled as Brit. Ost-Afrika], Kibwezi, 1907-1908, leg. G. SCHEFFLER, 3 ex. MNHUB. Kenya [labelled as Afr. or.], Ikutha, without date, 3 ex. MNHUB, 2 ex. HNHM. - Tanzania [labelled as Dt. Ost-Afrika], Gulwe, 18.-26.V.1926, leg. S. G. BRANDEs, 1 ex. MNHUB. - Tanzania [labelled as Tanganyika], Usa River, 3900 ft., 15.X1.-31.XII.1969, leg. J. SzuNyOGHy,

8 STUTTGARTER BEITRÄGE ZUR NATURKUNDE Ser. A, Nr. 687

2 ex. HNHM. - Tanzania [labelled as Tanganyika], 5 miles to Lake Sereri Eshore, 3150ft., 11.-27.VIIL.1965, leg. J. SzunvocHv, 1 ex. HNHM. - Sudan, W Darfur Prov., Disa, without date, leg. ALLISON, 2 ex. HNHM.

Diagnostic characters: Body length 2.8-3.8 mm. Dorsal side of head, prono- tum and elytra shining and glabrous. Shape of antennomeres subquadrate, see Fig. 18. Shape of pronotum and elytra see Fig. 17. Propleures glabrous. Punctures of head and pronotum of similar size, punctation on head slightly denser than on pronotum. Elytral stripes with visible punctures, elytral intervals slightly convex and with smaller punctures than on pronotum. Aedeagus see Fig. 19.

Remarks: The record from Namibia was already mentioned and figured by FER- RER (2004: 209) without definite species-identification, however in contrary to the listed 2 specimens only 1 specimen is housed in the Berlin Museum (JÄGER in litt.).

Distribution: Sudan (type locality); Ivory Coast, Ghana, Ethiopia, Kenya, Tan- zania, Congo, Namibia (new records).

2.7 Mimocellus wasmanni n.sp. (Figs. 1, 20-22)

Holotype (d): Congo [labelled as Congo Belge], P.N.G., Mission H. de SAEGER, 29.V.1952, leg. J. VERSCHUREN, HNHM (Mimocellus n.sp. det. BREMER).

Etymology: Named in honour of ERICH WasMANN (1859-1931), outstanding specialist of myrmecophilous and termitophilous Coleoptera and author of the genus Mimocellus.

Description: Body length 4.0 mm, unicoloured ferrugineous. Dorsal side of head, pronotum and elytra shining and with long and dense setation. Shape of an- tennomeres subquadrate, see Fig.21. Pronotum (Fig. 20) cordiform with the lateral margin slightly excavated before the hind angles, propleures with similar setation than on disc. Punctures of head and anterior part of pronotum of similar size, punc- tures of posterior part of pronotum distinctly bigger, punctation on head slightly denser than on pronotum. Elytra with nearly invisible punctural rows and without stripes, punctures of elytral intervals of similar size. Ventral side and legs without specific peculiarities. Aedeagus see Fig. 22.

Diagnosis: Mimocellus wasmanni n. sp. shares with M. bremeri n. sp. and M. pu- bescens the dense dorsal setation and the subquadrate antennomeres, but can be rec- ognized by the different shape of the pronotum (compare Figs. 5, 14, 20) and by the different shape of the aedeagus (compare Figs. 7, 16, 22). Additionally, in M. pubes- cens and M. bremeri n.sp. the elytral punctural rows are distinctly separated from the intervals, whereas in M. wasmanni n. sp. the punctation of the elytral rows and the elytral intervals is similar; in other words: the elytral punctation is not distinctly separated in rows and intervals.

3 Key to the species

Dorsal surface of head, pronotum and elytra with long and dense setation ........... 2 Dorsalsürtdcesglabreus: anna ua. Pr De ern ee OU BAP be Boteky 5 Shape of the antennomeres elongate (Fig. 12), body length 5.8 mm ..... M. girardi n.sp. Shape of the antennomeres subquadrate (Figs. 6, 15, 21), body length 2.5-4.0 mm ..... 3 Pronotum subquadrate (Fig. 14), elytra with distinct and regular rows of punctures with- out stripes, punctures of elytral intervals distinctly smaller than punctures of rows ......

pee th De I nl Bayan et ae Raed Bot MLE Be. er SE Lee wet mm M. pubescens Pronotum cordiform, lateral margin distinctly (Fig.5) or at least slightly (Fig. 20) excavat- ed before the hind angles, elytra with irregular rows of punctures without stripes, punc- tures of elytral intervals only slightly smaller or even of similar size than punctures of ROWS BAC Ms earch wi Te Ae a cock lke Deu A N DAN EAS ee TOES gd ESE AE hot heehee 2 TER 4

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SCHAWALLER, SPECIES OF AFRICAN GENUS MIMOCELLUS I

4 Lateral margin of pronotum distinctly excavated before the hind angles (Fig.5), body

length 3,0-3.6-mm, aedeagus see Fig. 7 2. cee ne woe nenn bee ee M. bremeri n. sp. Lateral margin of pronotum slightly excavated before the hind angles (Fig. 20), body length A Oradea eae us Seek 1a 20 aie ean nina Re ee eher bo M. wasmanni n. sp. 5 Shape of the antennomeres elongate (Fig. 9), elytral stripes with small punctures not sur- passing the stripes, body leneth 5.1-5.5 mm, Na rec an nn ae let M. decellei Shape of the antennomeres subquadrate (Figs. 3, 18), elytral stripes with wider punctures surpassing the stripes, bodyleneth 2:8-4.9 mm 45.02 4a neti aa ae ainde erence ates 6 6 Body length 2.8-3.8 mm, pronotum cordiform (Fig.17) ..............4. M. trechoides Body length 4.9 mm, pronotum trapezoid (Fig.2) ....... 0... eee eee eee M. braunsi

4 References

Arpotn, P. (1969): Contributions a la connaissance de la faune entomologique de la Cöte d’Ivoire (J. DECELLE, 1961-1964). XX XVII. Coleoptera Tenebrionidae. Annales du Musée Royal d’Afrique Centrale (Sciences zoologiques) 175: 139-285.

FERRER, J. (2004): Tenebrionidae (Coleoptera) de Namibia, avec descriptions de 12 espéces nouvelles. Mitteilungen aus dem Museum fiir Naturkunde Berlin (Zoologische Rei- he) 80: 181-250.

VOHLAND, K. & DECKERT, J. (2005): Termites (Isoptera) along a north-south transect in Na- mibia and South Africa. - Entomologische Zeitschrift 115: 109-115.

WasMANN, E. (1904): Termitophilen aus dem Sudan. Unter Mitwirkung von Prof. Auc. Fo- REL, K. EscHERICH und G. BREDDIN. In: JAGERSKIOLD, L. A. (ed.): Results of the Swedish Zoological Expedition to Egypt and the White Nile, 1901 under the direction of L. A. JAGERSKIOLD, no. 13, 21 pp., 1 pl.; Uppsala.

Author’s address:

Dr. WOLFGANG SCHAWALLER, Staatliches Museum fiir Naturkunde, Rosenstein 1, 70191 Stuttgart, Germany; e-mail: schawaller.smns@naturkundemuseum-bw.de

Manuscript received: 1.[X.2005, accepted: 28.1X.2005.

ISSN 0341-0145

Autoren-Richtlinien: http://www.naturkundemuseum-bw.de/stuttgart/schriften Schriftleitung: Dr. Hans-Peter Tschorsnig, Rosenstein 1, 70191 Stuttgart Gesamtherstellung: Gulde-Druck, 72072 Tübingen