Griffiniella heterogamia

Griffiniella heterogamia is a species of cockroach described by Heinrich Hugo Karny in 1908. Its known distribution is limited to the neighboring countries of Namibia and Botswana.[1][2]

Griffiniella heterogamia
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Insecta
Order:
Blattodea
Family:
Blaberidae
Genus:
Griffiniella
Species:
G. heterogamia
Binomial name
Griffiniella heterogamia
Karny, 1908
Synonyms

Karny's description

Karny's specimens were collected by German zoologist Leonhard Schultze in 1904 from Sekgoma and Khakhea, in the Kalahari Desert in the Bechuanaland Protectorate[3] (now Botswana). Karny described the ocelli (eye spots) and dorsal abdomen of the species as brown.[3]

Karny's 1908 description include the following measurements:

Male[3] Female[3]
Body length 15 mm (0.59 in) 10.5 mm (0.41 in)
Pronotum length 4 mm (0.16 in) 3 mm (0.12 in)
Pronotum width 5.5 mm (0.22 in) 3.5 mm (0.14 in)
Tegmina length 16 mm (0.63 in) 5 mm (0.20 in)

Rehn's description

James A. G. Rehn described specimens of G. heterogamia, collected 121 km (75 mi) southwest of Windhoek in what is now Namibia, as a proposed new species of symbiotic cockroach, Griffiniella kohlsi.[2] The description was published in 1965, after Rehn's death.[2] His proposed name, now considered a synonym of G. heterogamia, was named after Dr. Glen Kohls, who collected individuals of the species living in a large communal nest of the Sociable Weaver (Philetairus socius) bird.[2] The birds first construct a straw roof in isolated, large trees, including kokerboom and camel-thorn, then build many tunnels in the straw, which culminate in nest-chambers for breeding pairs, with scores of pairs living in the same colony.[2]

Rehn's description of Namibian specimens noted the "lappet-like" tegmina (outer forewings), measuring no more than 4.4 mm, and absence of hindwings in both sexes.[2] Karny's description of Botswanan specimens noted winged males with tegmina measuring 16 mm, and flightless females with tegmina measuring 5 mm.[3] Rehn considered Karny's description of the genus Griffiniella, but found "Karny emphasized little in his description which is of value except the dimorphism in alar development, the male of Griffiniella having fully developed tegmina and wings, the female having the former fully formed but reduced in length, the wings apparently lacking."[2]

Rehn's 1965 description, based on 2 female specimens and 9 male specimens, include the following measurements:

Male[2] Female[2]
Body length 13.1–18.7 mm (0.52–0.74 in) 11.8–12.0 mm (0.46–0.47 in)
Pronotum length 3.1–3.7 mm (0.12–0.15 in) 2.68 mm (0.11 in)
Pronotum width 4.7–5.6 mm (0.19–0.22 in) 3.7–3.9 mm (0.15–0.15 in)
Tegmina length 2.52–4.4 mm (0.099–0.17 in) 1.89–2.05 mm (0.074–0.081 in)
Tegmina width 1.89–2.37 mm (0.074–0.093 in) 1.10–1.58 mm (0.043–0.062 in)
Caudal femur length 3.1–3.9 mm (0.12–0.15 in) 2.68–2.84 mm (0.11–0.11 in)
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References
  1. Bisby, F.A.; et al., eds. (2011). "Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist". Reading, UK: Species 2000. Retrieved 2014-03-28.
  2. Rehn, James A. G. (1965-02-18). "New Genus of Symbiotic Cockroach from Southwest Africa (Orthoptera; Blattaria; Oxyhaloinae)". Notulae Naturae of The Academy of Natural Sciences of Philadelphia. Academy of Natural Sciences (374): 1–8. ISBN 978-1-60483-374-4. Illustrations of the dorsal view of a male, the head of a male, and a ventral view of the tip of a female's abdomen appear on page 8.
  3. Karny, H. (1908). "Blattaeformia oothecaria". In Schultze, Leonhard (ed.). Zoologische und anthropologische Ergebnisse einer Forschungsreise im westlichen und zentralen Südafrika: ausgeführt in den Jahren 1903-1905 mit Unterstützung der Kgl. Preussischen Akademie der Wissenschaften zu Berlin (in German). Jena, Germany: Verlag von Gustav Fischer. pp. 382–383. Bei dieser Species zeigt sich deutlich, das geflügelte ♂ ein viel mächtigeres, nach rückwärts verbreitertes Pronotum besitzt als das flugunfähige ♀. Illustrations of dorsal views of male and female genders, labeled 34 and 35, appear on page 551.
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