Prévalence et abondance de Charletonia cameroonensis Haitlinger & Kekeunou 2014 (Acari : Erythraeidae) parasite de Zonocerus variegatus (Linnaeus 1758) (Orthoptera : Pyrgomorphidae) dans la zone côtière du Cameroun

Objectifs: La recherche d’une stratégie de protection des cultures vivrières contre le criquet ravageur Zonocerus variegatus (Linnaeus 1758) (Orthoptera : Pyrgomorphidae) a consisté à étudier chez cet hôte, la prévalence et l’abondance de Charletonia cameroonensis Haitlinger & Kekeunou 2014 (Acari : Erythraeidae) dans la zone côtière du Cameroun.Méthodologie et résultats: Les captures et observations ont été menées hebdomadairement d’avril 2013 à avril 2014 à Logbessou, un quartier de la banlieue Nord-est de la ville de Douala. Pendant une heure (8h30-9h30), les individus de Z. variegatus ont été capturés et C. cameroonensis a été énuméré sur tout le corps de chacun. Il apparait que C. cameroonensis est un ectoparasite permanent de Z. variegatus, puisqu’il a été rencontré durant toute la période d’étude et sur la quasi-totalité des stades postembryonnaires. Sa prévalence a atteint 21,40 %. Le pourcentage d’infestation a significativement augmenté du stade larvaire 1 (4,14%) au stade adulte (67,58%). Ce pourcentage d’infestation a été plus élevé en saison pluvieuse (31,02%) qu’en saison sèche (7,69%). L’abondance de C. cameroonensis a varié de 0 à 23 individus parasites par individu de Z. variegatus. Cette abondance s’est accrue du stade larvaire1 au stade adulte. C. cameroonensis a été présent sur les trois tagmes de Z. variegatus, avec une charge significativement plus élevée sur le thorax et principalement au niveau des ailes. Une corrélation significativement positive a été obtenue entre l’abondance du parasite et la taille des populations du ravageur.Conclusions et application des résultats: Ces résultats préliminaires apportent des connaissances qui pourraient être approfondies dans le cadre d’études ultérieures pour une exploitation de C. cameroonensis dans une optique de lutte biologique contre Z. variegatus.Mots clés: Abondance, prévalence, C. cameroonensis, Z. variegatus, Zone côtièreEnglish AbstractObjectives: The search for a strategy to protect food crops against Zonocerus variegatus (Linnaeus 1758) (Orthoptera : Pyrgomorphidae) was to investigate the prevalence and abundance of Charletonia cameroonensis Haitlinger & Kekeunou 2014 (Acari : Erythraeidae) in the coastal area of Cameroon.Methodology and results: Catches and observations were conducted weekly from April 2013 to April 2014 in Logbessou, a sub-urban North-East of Douala. For one hour (8:30 to 9:30), individuals of Z. variegatus (all stages combined) were captured and the distribution of C. cameroonensis on each insect was recorded. It appears that C. cameroonensis was a permanent parasite of Z. variegatus. Parasite prevalence reached 21.40 %; this prevalence increased significantly from the stage 1 larva population (4.14%) to adult stage (67.58%). Parasite prevalence was higher during the rainy season (31.02%) than during the dry season (7.69%). C. cameroonensis abundance varied from 0-23 (averagely 0.54±1.65 parasites per host). This abundance also increased significantly from stage 1 larva (0.05±0.24 parasites per host) to adult (2.36±3.4 parasites per individual host). C. cameroonensis was present on the three body regions of the host, with a significantly greater parasite load on the thorax and more precisely on the wings. A significantly and positive correlation has been established between the parasite abundance and the size of Z. variegatus population.Conclusion and application of results: These preliminaries results provides important information that could be explored in future studies in the context of biological control of Z. variegatus by C. cameroonensis.Keywords: Abundance, prevalence, C. cameroonensis, Z. variegatus, Coastal zon

Pelmatoiulus tectus Fiemapong & Enghoff 2018, new combination

<i>Pelmatoiulus tectus</i> (Cook, 1897), new combination <p>Figs 1–7</p> <p> <i>Pachybolus tectus</i> Cook, 1897. Type-locality: Zanzibar. Holotype (only specimen known until now) said by Cook (1899) to be in the museum at Hamburg, but missing from that collection (Weidner 1960).</p> <p> <b>Material studied.</b> 1♂ Cameroon, littoral evergreen forest, Sanaga Maritime Division, Yansoki, 04°20’N, 009°83’E, secondary forest, 17.x.2017, A.R. Nzoko Fiemapong & A. Yetchom Fondjo leg. (ZMUC); 1♀ Cameroon, littoral evergreen forest, NKAM Division, Djawara, 04°21’N, 009°76’E, 10.ix.2017, A.R. Nzoko Fiemapong leg. (ZMUC); 1♂ Cameroon, Littoral Evergreen Forest Region, Yabassi, 4°95′N, 010°24′E, secondary forest, under dead leaves, 27.I.2017, A.R. Nzoko Fiemapong leg. (ARNF).</p> <p> <b>Descriptive notes.</b> The following notes are based on the newly studied material.</p> <p>Male. Body length ca. 15 cm, diameter 1.5 cm, 53 podous body rings + telson (no apodous body rings in front of telson).</p> <p>Colour of live animals (Fig. 1). Head, collum and telson brown; body ringed in black, orange and yellow, each body ring divided into a bright yellow anterior zone, an orange-red intermediate zone and a strongly contrasting, deep black posterior zone; antennae, legs and venter yellow-brown.</p> <p>After one year in alcohol head, antennae, collum, legs and telson reddish brown; body rings with pro- and mesozona rust red, metazona black.</p> <p> Incisura lateralis closed. Antennae with ca. 30 apical sensilla (Fig. 2 A–D); tip of sensilla with a pore surrounded by finger-shaped processes (Fig. 2 C). Antennomeres 5 and 6 with dorso-apical fields of small sensilla (Fig. 2 D). Gnathochilarium: stipites (<i>st</i>) each with 4–6 apical setae; lamellae linguales (<i>ll</i>) each with two setae arranged in a transverse subapical row (Fig. 2 E, F). Legs from third to last pair with large tibial pads.</p> <p> Anterior gonopods (Figs 3 A–B, 4 A–B) exactly as illustrated by Cook (1899): sternum (<i>st</i>) with a large, tongue-shaped, broadly rounded median lobe; coxae (<i>cx</i>) ca. 25% longer than sternal lobe, apically broadly rounded; telopodites (<i>tlp</i>) longer than sternal lobe, but shorter than coxae, in posterior view strongly narrowed at ca. 2/3 of their length, apical part a rounded lobe (<i>lo</i>, tip of <i>lo</i> visible in anterior view), mesal margin of telopodite broadly bent posteriad, forming a sigmoid flange (s <i>f</i>) ending in apical lobe.</p> <p> Posterior gonopods (Figs 3 C–D, 4 C, 5 A–B) also exactly as illustrated by Cook (1899): a single, slender, Cshaped sclerite with an irregularly rounded process (<i>pr</i>) at base, close to articulation with tracheal apodeme; at ca. 2/3 from base with constriction (<i>cn</i>), tip folded mesad, forming a broadly rounded apical lobe (<i>al</i>). A poorly sclerotized, obliquely striate area (<i>sa</i>) covering middle 1/3 and ending at constriction on external side of the "C". Efferent groove (<i>eg</i>) (cf. Enghoff 2011) running along inner curvature of "C", ending near gonopod apex at bentover side of apical lobe.</p> <p> <i>Female</i>. Body length ca. 15 cm, diameter 1.5 cm, 54 podous body rings + telson (no apodous body rings in front of telson).</p> <p>Non-sexual characters as in male, except antennae with 20–25 apical sensilla and gnathochilarial stipites each with 3 or 4 apical setae.</p> <p> Vulvae (Fig. 6) kidney-shaped; valves in basal half meeting in almost straight line, mesal margins with numerous short setae from level of tip of small operculum (<i>op</i>) almost up to highest point of valves (Fig. 6 B, D), in apical half with poorly sclerotized margins, margin of lateral valve with large rounded lobe (<i>lb</i>).</p>Published as part of <i>Fiemapong, Armand Richard Nzoko & Enghoff, Henrik, 2018, A giant African millipede re-discovered, re-located and re-classified after 120 years (Diplopoda, Spirobolida, Pachybolidae), pp. 403-413 in Zootaxa 4527 (3)</i> on pages 404-407, DOI: 10.11646/zootaxa.4527.3.9, <a href="http://zenodo.org/record/2612371">http://zenodo.org/record/2612371</a&gt

Trichopolydesmidae from Cameroon, 2: A species-level reclassification of Afrotropical trichopolydesmids (Diplopoda, Polydesmida), with two new species and two new records from Cameroon, and two new species from the Nimba Mountains, Guinea

Volume: 891Start Page: 31-5

A giant African millipede re-discovered, re-located and re-classified after 120 years (Diplopoda, Spirobolida, Pachybolidae)

Fiemapong, Armand Richard Nzoko, Enghoff, Henrik (2018): A giant African millipede re-discovered, re-located and re-classified after 120 years (Diplopoda, Spirobolida, Pachybolidae). Zootaxa 4527 (3): 403-413, DOI: https://doi.org/10.11646/zootaxa.4527.3.

Pelmatojulus excisus

<i>Pelmatojulus excisus</i> (Cook, 1897) <p>Recorded from Cameroon (“ Kamerun ” and Kribi) by Cook (1899). We have seen the following specimens: 1♂ Cameroon, Center Region, Ongot, disturbed forest, 03°51’N, 011°25’E, alt. 810 m, 30.I.2015, A.R. Nzoko Fiemapong leg. (ZMUC); 2♂ Cameroon, Center Region, Zamakoe Forest, N 03°33', E 011°31', 815 m a.s.l., forest, 18.IX.2015, A.R. Nzoko Fiemapong & C. Oumarou Ngoute leg. (ARNF); 1♂ Cameroon, Littoral Region, Sanaga Maritime Division, Mouanko, forest, N 0 3 ° 38 ', E 0 0 9 ° 46', A.R. Nzoko Fiemapong et J.A. Yetchom Fonjo leg. (ARNF).</p>Published as part of <i>Fiemapong, Armand Richard Nzoko & Enghoff, Henrik, 2018, A giant African millipede re-discovered, re-located and re-classified after 120 years (Diplopoda, Spirobolida, Pachybolidae), pp. 403-413 in Zootaxa 4527 (3)</i> on page 407, DOI: 10.11646/zootaxa.4527.3.9, <a href="http://zenodo.org/record/2612371">http://zenodo.org/record/2612371</a&gt

Pelmatojulus brachysternus

<i>Pelmatojulus brachysternus</i> (Cook, 1897) <p>New to the fauna of Cameroon. We have seen the following specimens: 1♂ Cameroon, South Forest Region, Bipindi, Mt Bidjouka Canton Pygmée, N 3°15′, E 10°50′, near primary forest, under dead leaves, 14.I.2017, A.R. Nzoko Fiemapong & C. Oumarou Ngoute leg. (ZMUC); 1♂, 1♀ same data (ARNF); 1♂ Cameroon— 1949-50, 1/ 12-138. Lok. RF. Makak, J. Birket-Smith & J. Dahl leg. (ZMUC). RF Makak must refer to “Réserve Forestière de Makak”, situated at 03°32’N, 011°01’E, just S of the city of Makak.</p>Published as part of <i>Fiemapong, Armand Richard Nzoko & Enghoff, Henrik, 2018, A giant African millipede re-discovered, re-located and re-classified after 120 years (Diplopoda, Spirobolida, Pachybolidae), pp. 403-413 in Zootaxa 4527 (3)</i> on page 407, DOI: 10.11646/zootaxa.4527.3.9, <a href="http://zenodo.org/record/2612371">http://zenodo.org/record/2612371</a&gt

Trichopolydesmidae from Cameroon, 2: A species-level reclassification of Afrotropical trichopolydesmids (Diplopoda, Polydesmida), with two new species and two new records from Cameroon, and two new species from the Nimba Mountains, Guinea

A revised classification of Afrotropical Trichopolydesmidae is presented. The fauna presently contains as many as 52 species in six recognized genera, with numerous new transfers/combinations involved: Bactrodesmus Cook, 1896 (3 species, including B. grandis sp. nov. from the Nimba Mountains, Guinea), Eburodesmus Schubart, 1955 (2 species), Hemisphaeroparia Schubart, 1955 (26 species, including one old species, Polydesmus parvulus Porat, 1894, revised from type material and provisionally assigned to Hemisphaeroparia, as well as two new records and two new species from Cameroon: H. longibrachiata sp. nov. and H. avis sp. nov.), Mecistoparia Brolemann, 1926 (3 species), Physetoparia Brolemann, 1920 (12 species, including P. complexa sp. nov. from the Nimba Mountains, Guinea), and Sphaeroparia Attems, 1909 (6 species). The hitherto enigmatic genus Bactrodesmus is redefined, but the monotypic Trichozonus Carl, 1905 still remains dubious