Morphological revision of the hyperdiverse Brueelia - complex (Insecta: Phthiraptera: Ischnocera: Philopteridae) with new taxa, checklists and generic key Author Bush, Sarah E. text Zootaxa 2017 2017-08-31 4313 1 1 443 journal article 32249 10.11646/zootaxa.4313.1.1 d8cc2cd8-8410-49aa-a75d-7a41d9f52b26 1175-5326 883161 A5Fdfba5-F992-44A8-84C2-1756C943C19B Ceratocista Gustafsson & Bush , new genus Brueelia Kéler, 1936a : 257 ( in partim ). Type species. Brueelia antennatus Ansari, 1956a : 139 Diagnosis. Ceratocista n. gen. ( Figs 153–160 ) is most similar to Resartor n. gen. ( Figs 161–167 ), and these two genera share the following characteristics: pos and pns absent; tps absent in both sexes; marginal carina interrupted only submedianly and displaced section at osculum forms nail-like thickening of dorsal anterior plate; female subgenital plate flares into medianly displaced cross-piece; proximal mesosome slender; parameral blades slenderly triangular, somewhat extended distally; female tergopleurite IX+X fused with tergopleurite XI; sternal plate VI of both sexes with 2 sts . However, antennae are sexually dimorphic in Ceratocista ( Figs 155–156 ) but not in Resartor ( Fig. 163 ), and while ss are present on male tergopleurites II–VIII in Resartor ( Fig. 161 ), these are present only on tergopleurites VII–VIII in Ceratocista ( Fig. 153 ). In both genera the mesosomal lobes are extended laterally to overlap dorsally with the parameres, but Resartor ( Fig. 165 ) does not have the large postero-lateral brush-like extensions of these lobes found in Ceratocista ( Figs 157–158 ), nor are the antero-lateral triangular sections of the lobes found in Ceratocista present in the male genitalia of Resartor . The frons is clearly hyaline in Resartor ( Fig. 163 ), whereas in Ceratocista it is pale but apparently sceloritzed but translucent ( Fig. 155 ). Ventral anterior plate absent in Resartor ( Fig. 163 ) but present in Ceratocista ( Fig. 155 ). The lateral extensions of the mesosomal lobes in Ceratocista are similar to those found in Psammonirmus n. gen. ( Fig. 150 ), but the differences between these two genera are substantial, and have been listed under Psammonirmus . Description. Both sexes . Head narrow, concave-dome shaped ( Fig. 155 ). Marginal carina broad, interrupted submedianly. Displaced section forms nail-like marginal carinal plate at osculum, delimited posteriorly by sinuous ridge. Dorsal preantennal suture arises from interruptions of marginal carina, not medianly continuous and not reaching ads or dsms . Ventral carinae with finger-like median protrusion; carinae diffuse anterior to pulvinus. Ventral anterior plate present. Head setae Fig. 155 ; avs2 much shorter than avs3 ; pos and pns absent. Antennae sexually dimorphic, with male scape ( Fig. 155 ) much elongated and thicker than female scape ( Fig. 156 ). Temporal carinae not visible; mts 3 only macrosetae. Gular plate roughly triangular. Prothorax rectangular ( Figs 153–154 ); ppss on postero-lateral corner. Proepimera hammer-shaped medianly. Pterothorax pentagonal; lateral margins divergent and posterior margin convergent to median point ( Figs 153–154 ). Meso- and metasterna not fused, one seta on postero-lateral corner on each side of each plate. Metepisterna hammer-shaped medianly. mms moderately interrupted medianly. Leg chaetotaxy as in Fig. 25 , except fI-p2, fI-v4 absent. Abdomen ( Figs 153–154 ) broadly oval, much stockier in male than in female. Terminal end of abdomen rounded in male, deeply divided in female. Abdominal chaetotaxy as in Table 2 . Tergopleurites II–IX+X in male and tergopleurites II–VIII in females narrowly divided medianly, rectangular, but more posterior tergopleurites in males triangular. Female tergopleurite IX+X fused to tergopleurite XI. Sternal plates medianly continuous, rectangular, approaching but not reaching pleurites. Pleural incrassations with dorsal and ventral median margins. Re-entrant heads moderate to large. Male subgenital plate triangular with lateral indentation on segment IX+X. Female subgenital plate trapezoidal ( Fig. 160 ), reaching vulval margin where it flares into a medianly displaced cross-piece. Male genitalia as in Figs 157–159 . Proximal mesosome slender, elongated. Gonopore open only distally. Mesosomal lobes large, overlapping with parameres dorsally, fringed on distal margin. 3 ames anterior to gonopore. Parameral heads blunt, with accessory sclerite. Parameral blades slenderly triangular; pst1–2 both sensilla, submarginal. Host distribution. Ceratocista is presently known only from a single host species of the genus Grammatoptila Reichenbach, 1872 , in the family Timaliidae . Geographical distribution. Presently known only from South Asia. Etymology. Ceratocista is formed by Greek “ kérato ” for “horn” and Latin “ cista ” for “chest”, referring both to the box-shaped head and the prominent male antennae ( Fig. 155 ) of the only known species of this genus. Gender: feminine. Included species * Ceratocista antennata ( Ansari, 1956a: 139 ) n. comb. [in Brueelia ]