Marcenendius fortunatus ( NavÁs, 1917 ) Lienhard & Baz & Ch-, 2011

Lienhard, Charles & Baz, Arturo, 2011, Redescription of the genus Marcenendius Navás (Psocodea: ‘ Psocoptera’: Amphientomidae) with a key to western Palaearctic amphientomids, Revue suisse de Zoologie 118 (3), pp. 451-466 : 459-461

publication ID

https://doi.org/ 10.5281/zenodo.5822830

persistent identifier

https://treatment.plazi.org/id/D669AE0A-FFD1-4F2E-8B89-BF3F8633FEEB

treatment provided by

Carolina

scientific name

Marcenendius fortunatus ( NavÁs, 1917 )
status

comb. nov.

Marcenendius fortunatus ( NavÁs, 1917) View in CoL comb. nov. Figs 6 View FIG a-d; 5c, d

Perientomum fortunatum NavÁs, 1917: 20 .

Nephax fortunatus ( NavÁs, 1913) View in CoL : Meinander, 1973: 143 (redescription based on holotype, male, figs); Lienhard, 1988: 369 (further description, male and female, figs); Lienhard, 1998: 141 (diagnosis, figs).

DISTRIBUTION: M. fortunatus is a Macaronesian endemic known from the following islands. Canary Islands: Tenerife ( NavÁs, 1917; Meinander, 1973; Lienhard, 1988; Baz & Zurita, 2001, 2004); La Palma (Domingo-Quero et al., 2003); unpublished records from Tenerife, La Palma, La Gomera, El Hierro, Gran Canaria, Fuerteventura, Lanzarote (leg. C. Lienhard, material in the MHNG). – Cape Verde Islands: island of Santiago ( Lienhard, 1988; Lienhard & Garcia, 2005).

DISCUSSION: Based on general morphology of adults and nymphs, this brachypterous species is closely related to M. nostras (see key, below). Macropterous specimens of M. fortunatus have never been observed, but the most significant morphological difference between this species and M. nostras is the strong reduction, in the latter, of the T-shaped sclerite of the female subgenital plate.

M. fortunatus lives usually under stones at places incompletely covered by xerophytic shrub vegetation, often also in stone walls built by humans ( Fig. 5d View FIG ). Adults are rather well camouflaged by their mottled wing pattern due to scales ( Fig. 5c View FIG ) and Marcenendius fortunatus (NavÁs) , female (a-d): (a) Mandibles. (b) Three pronotal "corkscrew" hairs. (c) Maxillary palp. (d) Hindmargin of subgenital plate with T-shaped sclerite, pilosity not shown. – Nephax sofadanus Pearman , female (e-h): (e) Hindmargin of subgenital plate with T-shaped sclerite, pilosity not shown. (f) Labrum, pilosity not shown. (g) Maxillary palp, with spur sensillum and macrochaetae shown in black. (h) Mandibles.

nymphs usually carry some loosely arranged dust particles on dorsal side of thorax (including wing pads) and of abdomen (personal observation by C. Lienhard). This nymphal camouflage is probably due to the presence of corkscrew hairs on these parts of the body (see genus discussion). Environmental dust particles probably adhere much more easily to such curled hairs than to straight hairs. However, the effectiveness of these hairs seems to be less than in the case of glandular hairs, where covering with dust particles is more complete and nymphal camouflage much more impressive (e. g. nymphs with glandular hairs of Protroctopsocidae or Psocidae ; see Lienhard, 1998).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Psocodea

Family

Amphientomidae

Genus

Marcenendius

Loc

Marcenendius fortunatus ( NavÁs, 1917 )

Lienhard, Charles & Baz, Arturo 2011
2011
Loc

Nephax fortunatus ( NavÁs, 1913 )

LIENHARD, C. 1998: 141
LIENHARD, C. 1988: 369
MEINANDER, M. 1973: 143
1973
Loc

Perientomum fortunatum NavÁs, 1917: 20

NAVAS, L. 1917: 20
1917
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