Insects - Southern Africa (identified for the 1st time on iNat or difficult to identify)'s Journal

March 04, 2024

Plagiostenopterina submetallica (Loew 1852)

Plagiostenopterina is a large genus with 10 Afrotropical species described. Plagiostenopterina is distinct in having microtrichia on the face, setulae on the scutellum, widely distributed over the surface and not restricted to the lateral margin.

Plagiostenopterina submetallica is blackish-aeneous metallic with ahort whitish pubescence on thorax and abdomen. Frons entirely shining brownish-red. Antennae blackish with long thin arista, with apical palette in the male. Wing cell br is brown in colour and the costal margin is dark, and there is a dark infuscation along the crossvein dm-m. Knobs of halters pale yellow.

Original description:
https://www.biodiversitylibrary.org/item/41528#page/672/mode/1up
https://www.biodiversitylibrary.org/item/103636#page/59/mode/1up
Translated from Latin:
Greenish-black grayish, opaque; the costa of the hyaline wings is narrowly black-margined from the stigma to the apex of the fourth longitudinal vein; a black stripe runs from the base of the wing to the anterior crossvein (then thinner, finally fading) to the posterior crossvein which is black-margined.

Wing illustrated in:
Lamb, C.G. 1914. No. XV.—Diptera: Heteroneuridae, Ortalidae, Trypetidae, Sepsiae, Micropezidae, Drosophilidae, Geomyzidae, Milichidae. Transactions of the Linnean Society of London. Second Series–Zoology 16
https://ia601407.us.archive.org/12/items/biostor-127774/biostor-127774.pdf

Key and redescription in:
Hendel, F. 1914. Die Arten der Platystominen. Abh. Zool.-Bot. Ges. Wien 8(1)
https://www.biodiversitylibrary.org/item/28240#page/68/mode/1up

Type locality: Inhambane, Mozambique

iNat observation: https://www.inaturalist.org/observations/164647036

Posted on March 04, 2024 12:21 PM by traianbertau traianbertau | 0 comments | Leave a comment

March 02, 2024

Comythovalgus fasciculatus (Gyllenhal, 1817)

Comythovalgus species are short, thick and very small and have many tufts of squamose hair on thorax and elytra. Elytra truncate at apex, much broader than throrax. Head retractile. Sexual differences can be found in the teeth of the front tibiae (5-dentate in males; 3-dentate in females). This sexual dimorphism was previously mistakenly interpreted as a species difference.
Only two species have been described from Southern Africa: Comythovalgus plumatus (Fåhraeus, 1857) and Comythovalgus fasciculatus (Gyllenhal, 1817). The species described by Fåhraeus (https://www.biodiversitylibrary.org/item/48646#page/67/mode/1up) could be conspecific with Comythovalgus fasciculatus, since sexual dimorphism in the tibia was not yet known at that time and the descriptions do not mention any other substantial differences other than colour of setae.


Description and illustration in:
Péringuey, L. Descriptive catalogue of the coleoptera of South Africa (Lucanidae and Scarabaeidae)
https://www.biodiversitylibrary.org/item/37675#page/31/mode/1up

Fuscous, entirely covered with extremely dense scale-like, appressed, light fulvous hairs, and having in well-preserved examples a very plain, lighter-coloured patch of scales on each side of the scutellum; clypeus acuminate, slightly emarginate at tip; head bearing two small fascicles of hairs; prothorax with ten fascicles of squamose hairs disposed as follows: two in the middle of the anterior margin, two in the centre of the disk, two in the centre of the base, and two on each side of the discoidal parts; the two anterior tufts are sometimes greatly reduced; elytra almost twice as broad as the prothorax, plane, narrower at apex than at base, plane, vertical laterally, leaving the sides of the dorsal part of the abdominal segments uncovered as well as the propygidium, they have on each side four fascicles of squamiform hairs, viz., one somewhat bi-fasciculate at the shoulder, two along the outer margin, and one at the apex; the broad propygidium has two long ones at the apical margin, and the pygidium two in the centre, and two smaller ones at the apex; anterior tibiae with five outer teeth in the male, three of these are strong and the two intermediate ones very small, only tri-dentate in the female, the pygidium of which is shaped as in the male, intermediate and hind tibiae sub-fasciculate.
Length 5-5.25 mm.; width 3.5 mm.

Distribution: South Africa (Eastern Cape: Uitenhage, Port St. John and KZN: Durban, Maritzburg) and Zimbabwe.

Original description:
https://www.biodiversitylibrary.org/item/133009#page/45/mode/1up

iNat observation: https://www.inaturalist.org/observations/11045384

Posted on March 02, 2024 10:06 AM by traianbertau traianbertau | 1 comment | Leave a comment

February 29, 2024

Macrocoma aureovillosa (Marshall 1865)

A metallic green hairy leaf beetle.

Original description in:
Marshall, T. A. 1865. Eumolpidarum Species novae. The Journal of Entomology. 2
https://www.biodiversitylibrary.org/page/13387949#page/360/mode/1up
Translated from Latin:
Cylindrical, elongated, bright green, metallic. Elytra posteriorly densly golden hairy, 2nd-6th antennal articles rufous-pitch, sometimes rufous. Legs green, hairy.

The whole body strongly punctate, especially in front; the interstices of the puncture rows are finely needle-like streaked. Labrum smooth, bright; red eyes. The first article of the antennae is green, metallic, the 2nd-6th rufous-pitch, above in part metallic, sometimes the whole red; black club.
The thorax is cylindrical, not longer than it is broad, narrowed anteriorly, the angles suddenly bent, inconspicuous above, the sides slightly rounded in the middle, at the elytral base narrower.
Elytra more than twice as long as thorax, parallel, apex scarcely narrowed, rounded on the back and behind everywhere, cylindrical. Legs and the whole body both above and below with long, pale golden hairs. The apical pilosity of the elytra is much denser, apically arranged as if striate. On the thorax and the disc of the elytra some of the hairs are longer than the others, and are blackened. Femora slightly thickened.

Type locality: 'Natal'

iNat observation:
https://www.inaturalist.org/observations/200713057

Posted on February 29, 2024 05:20 PM by traianbertau traianbertau | 0 comments | Leave a comment

February 28, 2024

Homoneura rhodesi Curran 1938

Rusty reddish yellow; frons longer than wide; abdomen with incomplete median brown vitta; wings with six brown spots. Length, 4.5 mm.

Description & illustration of wing in:
Curran, C.H. 1938. The African Lauxaniidae (Diptera). American Museum Novitates 979.
https://digitallibrary.amnh.org/items/dc9a8091-1936-408e-be7b-f7f5a0141185

Female:
Face and front yellowish white, the frontal vitta yellow; occiputreddish yellow. Front distinctly longer than wide, with tiny blackish hairs on the anterior two-thirds; ocellars long and strong. Palpi yellow. Antennae reddish, the arista brown and short plumose.
Thorax yellow, the dorsum rusty reddish and with grayish-yellow pollen that does not obscure the ground color. The mesonotum bears a pair of broad obscure reddish-brown vittae lying just inside the dorsocentrals and the scutellum is of the same color except on the border and a slender median line. Three pairs of dorsocentrals.
Legs yellowish; anterior femora with a very weak comb on the apical third.
Wings cinereous hyaline, tinged with luteous in front, and bearing six brown spots, one over each of the crossveins, one on the end of the second vein and one slightly before it on the third vein, and spots before the apices of the third and fourth veins. Squamae rusty reddish, with tawny fringe. Halteres yellow.
Abdomen rusty reddish yellow, very thinly pollinose, the third, fourth and fifth segments each with median apical brown triangles that extend forward to form an interrupted, incomplete median vitta. Marginals on the second segment weak and not conspicuous.

Type locality: Harare, Zimbabwe

iNat observation: https://www.inaturalist.org/observations/192233947

Posted on February 28, 2024 12:23 PM by traianbertau traianbertau | 0 comments | Leave a comment

Sanazarius biseriatus Drake 1953

Genus Sanazarius: Body subovate, pubescent; head short, clypeus not surpassing apical half of first antennal segment; length of antennae subequal or shorter than that of pronotum; cephalic spines present; bucculae open anteriorly; pronotum tricarinate, height of median carina equal to or slightly shorter than that of lateral carinae; pronotal hood slightly bulbous, extending beyond the apex of head in dorsal view; paranotum expanded, produced near the middle, oriented subvertically; hemelytra with claval area weakly developed, almost entirely covered by posterior margin of pronotum; costal area narrow, with one or two rows of areolae; discoidal area level, extending beyond the middle of hemelytra; hypocostal laminae extending to the apex of abdomen


Sanazarius biseriatus
Diagnosis: Costal area of hemelytra with two rows of areolae ('biseriatus'). Paranota with rounded outer margins.

Distribution: Cape, South Africa.

Original description in:
Drake, C. J. 1953. A new genus and new species of Tingidae (Hemiptera). Proceedings of the Biological Society of Washington 66.
https://www.biodiversitylibrary.org/item/111599#page/255/mode/1up

iNat observations:
https://www.inaturalist.org/taxa/1147672-Sanazarius-biseriatus/browse_photos

Posted on February 28, 2024 11:34 AM by traianbertau traianbertau | 0 comments | Leave a comment

February 27, 2024

Compseuta capensis (Walker 1873)

Pronotum without lateral keels with rounded lateral angles, with fine punctuation, light brown in colour, narrowly dark on the sides, lateral edge of the pronotum narrowly yellowish with a row of indistinct tiny areolae, costal edge of the hemelytra initially with very small areolae, slightly larger in the last third. Length 2.9-3.0 mm.

Original description in:
Walker, F. 1873. Catalogue of the specimens of Heteropterous Hemiptera in the Collection of the British Museum. Part VII
https://www.biodiversitylibrary.org/item/206325#page/16/mode/1up

Key, redescription & illustration (figure 3) in:
Göllner-Scheiding, U. 2009. Revision der afrotropischen Arten der Gattung Compseuta Stål 1873. Beiträge zur Entomologie, vol. 59, no. 1
https://www.contributions-to-entomology.org/article/view/1745/1744

Distribution: South Africa (Kwazulu-Natal, Maputaland).

Host plant: Dalbergia armata

iNat observation: https://www.inaturalist.org/observations/175083436

Posted on February 27, 2024 07:02 PM by traianbertau traianbertau | 0 comments | Leave a comment

Compseuta holana Drake 1948

Lateral edge of the pronotum narrowly yellow with fine punctuation, pronotum unicolor dark shiny with light tip and three yellow longitudinal carinae, hemelytra yellowish, coarsely punctuated, costal edge with a single row of initially small, then larger areolae from about the middle. Length 3.2 mm.

Original description in:
Drake, C. J. 1948. The genus Compseuta STÅL (Hemiptera, Tingidae). Proceedings of the Entomological Society of Washington 50, no 8
https://www.biodiversitylibrary.org/item/81132#page/509/mode/1up

Key, redescription & illustration (figure 6) in:
Göllner-Scheiding, U. 2009. Revision der afrotropischen Arten der Gattung Compseuta Stål 1873. Beiträge zur Entomologie, vol. 59, no. 1
https://www.contributions-to-entomology.org/article/view/1745/1744

Distribution Ethiopia, Botswana, DR Congo, Namibia, South Africa, Tanzania, Uganda and Zambia.

iNat observation:
https://www.inaturalist.org/observations/150037377

Posted on February 27, 2024 10:00 AM by traianbertau traianbertau | 0 comments | Leave a comment

Chrysolina (Naluhia) acervata Bechyně 1948

Elytra red, covered with round dark spots, irregularly arranged, often confluent and asymmetrical. Elytral puncture rows mostly irregular (partly arranged in indistinct rows), with fine barly visible punctures among dense, irregular punctures in intervals. Dorsum rufous with black spots. Length 7.5 - 8.3 mm.

Type locality: 'Bas Congo'.
Recorded from Namibia (Zambezi Region)

Original description in:
Bechyně, J. 1948. Coléoptères d'Angola. Phytophaga, Chrysomelidae et Halticidae. Revue Suisse de Zoologie 55 (4, no. 29)
https://www.biodiversitylibrary.org/page/43795686#page/580/mode/1up

Key (page 452) and figure 18 in:
Bieńkowski, A. (2021) Book preview/manuscript. Chrysolina of the World. Taxonomic Review. 5b. Review Chrysolina-Pleurosticha.
https://www.zin.ru/animalia/coleoptera/pdf/5b.Review_Chrysolina-Pleurosticha.pdf

iNat observation:
https://www.inaturalist.org/observations/191917674

Posted on February 27, 2024 08:14 AM by traianbertau traianbertau | 0 comments | Leave a comment

February 26, 2024

Chiliarchum bertolonii (Guérin-Méneville, 1844)

A distinctly costate Chiliarchum species in which, like C. freyi and C. arnoldi, the two basal impressions of the pronotum are located in the posterior angles.

Description in:
Haag-Rutenberg G. 1871. Beiträge zur Familie der Tenebrioniden (II. Stück). Coleopterologische Hefte 7
https://www.biodiversitylibrary.org/item/81206#page/367/mode/1up
Translated from Latin:
Very large, elongated; thorax cordiform, near the posterior corner impressed, punctate, margin and impression white-tomentose; elytra elongate, with three distict costae, at the margin, towards apex widened, intervalls sometimes whitish-tomentose and very fine scabrous; slightly punctate below, mesosternal process, thorax ventrally and tibiae covered with a rusty-red tomentum.
Male: Slender, thorax more cordiform, abdominal segments 1-3 with large oblong reddish-brown spot. - Length 44-50 mm, width 16-17 mm.
Female: Broader, abdominal segments immaculate. - Length. 42-52 mm, witdh 17-20 mm.

Male illustrated in:
Guérin-Méneville, F. E. 1844. Insectes Magasin de Zoologie, D’ Anatomie Comparee et de Paleontologie, Recueil

iNat observation:
https://www.inaturalist.org/observations/14373093

Posted on February 26, 2024 03:39 PM by traianbertau traianbertau | 0 comments | Leave a comment

February 24, 2024

Glipidiomorpha obsoleta Franciscolo 1955

Original description with illustration in:
Franciscolo, M. E. 1955. Mordellidae and Scraptiidae in the Collections of the Durban Museum (XXIX. Contribution to the Knowledge of Mordellidae and Scraptiidae). Part I. Durban Museum Novitates, Vol. IV. Part XII
https://journals.co.za/doi/pdf/10.10520/AJA0012723X_1851

Hind tibiae with a distinct dorso-lateral ridge, hairy eyes, elytra with file-like sculpture. The upper surface is prevailingly covered by grey pubescent markings, as shown in the figure; the pronotum bears three small areas covered by black hairs, one elongate at middle, and one at each side of it; maxillary palpi ferrugineous; front and middle tarsi a little clearer; anterior femora rusty-reddish. Pubescent markings of elytra of moderate size, leaving free large black spots (see figure); the postmedian pubescent band is normally sinuous on each elytron; pygidium covered with whitish pubescence, leaving a small subtriangular black spot at base.

Type locality: Chirinda Forest, Zimbabwe

iNat observation: https://www.inaturalist.org/observations/111636146

Posted on February 24, 2024 06:57 PM by traianbertau traianbertau | 0 comments | Leave a comment

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