Teinomordeus Gustafsson & Bush

Bush, Sarah E., 2017, Morphological revision of the hyperdiverse Brueelia - complex (Insecta: Phthiraptera: Ischnocera: Philopteridae) with new taxa, checklists and generic key, Zootaxa 4313 (1), pp. 1-443: 55-56

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Teinomordeus Gustafsson & Bush

new genus

Teinomordeus Gustafsson & Bush  , new genus

Type species. Teinomordeus entelosetus  new species

Diagnosis. Teinomordeus  n. gen. ( Figs 75–76View FIGURES 75 – 76) is morphologically similar to Brueelia  s. str. ( Figs 42–43View FIGURES 42 – 43), sharing the same preantennal head structure and chaetotaxy, except that s3 is present in Teinomordeus  ( Fig. 77View FIGURES 77 – 82) but absent in most Brueelia  s. str. ( Fig. 44View FIGURES 44 – 48). The two genera are separated by the following characters: antennae monomorphic in Brueelia  s. str. ( Fig. 44View FIGURES 44 – 48; except species on Turdoides  spp.) but sexually dimorphic in Teinomordeus  ( Figs 77–78View FIGURES 77 – 82); ps absent on segment II in female Brueelia  s. str. ( Fig. 43View FIGURES 42 – 43) but present in female Teinomordeus  ( Fig. 76View FIGURES 75 – 76); female subgenital plate with cross-piece in Brueelia  s. str. ( Fig. 48View FIGURES 44 – 48), but without cross-piece in Teinomordeus  ( Fig. 82View FIGURES 77 – 82); ss absent in male Brueelia  s. str. on tergopleurites III –IV [except in Br. nebulosa ( Burmeister, 1838)  where ss are present on tergopleurite IV; Table 3], but these are present in Teinomordeus  ( Fig. 75View FIGURES 75 – 76). In male Br. brachythorax tps  are absent, but these are present in male Teinomordeus  ( Fig. 75View FIGURES 75 – 76) and in some groups of Brueelia  s. str. (see Table 3); however, only in Br. brevipennis  and Br. nebulosa  and near relatives of these are tps  present on tergopleurite V.

Male genitalia of Teinomordeus  ( Figs 79–81View FIGURES 77 – 82) similar to those of Anarchonirmus  n. gen. ( Figs 118–120View FIGURES 116 – 121), but differs in the shape of the basal apodeme and mesosomal lobes. In both genera, antennae are sexually dimorphic, but this is more pronounced in Anarchonirmus  ( Figs 116–117View FIGURES 116 – 121) than in Teinomordeus  ( Figs 77–78View FIGURES 77 – 82). Clypeo-labral suture does not reach anterior margin of head in Anarchonirmus  ( Fig. 116View FIGURES 116 – 121), but does so in Teinomordeus  ( Fig. 77View FIGURES 77 – 82). Tergopleurites reach lateral margins of abdomen in Teinomordeus  ( Figs 75–76View FIGURES 75 – 76) but not in Anarchonirmus  ( Figs 114–115View FIGURES 114 – 115). There are also differences in abdominal chaetotaxy of both genera (see Table 2), and while the female subgenital plate flares into a medianly displaced cross-piece in Anarchonirmus  ( Fig. 121View FIGURES 116 – 121), no cross-piece is present in Teinomordeus  ( Fig. 81View FIGURES 77 – 82).

Description. Both sexes. Head convex-dome shaped ( Fig. 77View FIGURES 77 – 82), preantennal area shorter than postantennal area in male, but not in female. Marginal carina narrow, not interrupted, but deeply displaced posteriorly and dorsally at clypeo-labral suture. Frons hyaline. Ventral carinae diffuse anterior to pulvinus, not clearly continuous with marginal carina. Head setae as in Fig. 77View FIGURES 77 – 82; as3 and pns absent; ads very long; pos on eye. Ventral anterior plate absent. Antennae sexually dimorphic: male scape ( Fig. 77View FIGURES 77 – 82) longer and broader than female scape ( Fig. 78View FIGURES 77 – 82). Coni small. Marginal and occipital carinae not visible. Marginal temporal carina narrow; mts  3 only macroseta. Gular plate diffuse, broadly triangular.

Prothorax ( Figs 75–76View FIGURES 75 – 76) rectangular; ppss on postero-lateral corner. Proepimera with hook-shaped median ends. Pterothorax trapezoidal: lateral margins divergent, posterior margin gently rounded. Meso- and metasterna not fused; one seta on postero-lateral corner of each on each side. Median ends of metepisterna blunt; mms moderately separated medianly. Leg chaetotaxy as in Fig. 25View FIGURES 25, except fI-p2, fI-v4, fII-v2, fIII-v2 absent.

Abdomen ( Figs 75–76View FIGURES 75 – 76) oval, more oblong in female. Tergopleurites rectangular; tergopleurites II –IX+X in male and tergopleurites II –VIII in female narrowly divided medianly. Female tergopleurite XI diffuse. Sternal plates medianly continuous, rectangular, in male approaching pleurites. Pleurites completely fused to tergopleurites; re-entrant heads absent. Abdominal chaetotaxy as in Table 2. Male subgenital plate broadly trapezoidal, reaching posterior margin of abdomen. Female subgenital plate broadly trapezoidal, reaching or approaching vulval margin, but not flaring into cross-piece. Vulval margin ( Fig. 82View FIGURES 77 – 82) with slender vms, thorn-like vss. vos follows lateral margins of subgenital plate; distal vos median to vss.

Basal apodeme ( Fig. 79View FIGURES 77 – 82) slenderly rectangular, lateral sections extending distally. Proximal mesosome small, rounded. Gonopore ( Fig. 80View FIGURES 77 – 82) large, open distally, antero-laterally with pronounced extensions. Mesosomal lobes large, elongated, rugose distally. Two pmes visible on each lobe. Parameral heads ( Fig. 81View FIGURES 77 – 82) bluntly bifid. Parameral blades elongated distally, with distinct median heel just distal to mesosome; pst1–2 near distal end.

Host distribution. Limited to a single species of Laniidae  , Eurocephalus rueppelli  .

Geographical range. Afrotropical.

Etymology. Teinomordeus  is formed by Greek “ teino ” for “extended”, referring to the distally elongated parameres, and Latin “ mordeo ” for “biting”, referring to the fact that this is a chewing louse. Gender: masculine.

Remarks. No representative of Teinomordeus  was included on the phylogeny of Bush et al. (2016), and its relationships with other members of the Brueelia  -complex are unknown. Similarities in head structure and structure of male genitalia places the genus close to Brueelia  s. str.

Included species

* Teinomordeus entelosetus  new species