Bahiamezira cerroensis, Heiss, 2014

Heiss, E., 2014, Two new apterous Mezirinae from Brazil (Hemiptera: Heteroptera: Aradidae), Linzer biologische Beiträge 46 (2), pp. 1329-1336 : 1333-1334

Bahiamezira cerroensis nov.sp. ( Photo 3-4 )

H o l o t y p e male labeled: Brasilia / Bahia Uruçuca nr. / Cerro Grande / 3 II 1992 L. Chapman //; Holotype / Bahiamezira cerroensis n.gen. n.sp. / des. E. Heiss 2014 // (red label, CEHI).

D e s c r i p t i o n: Holotype male; apterous, body surface shiny with small but deep punctures; lateral margins of head, body and its elevated structures, legs and antennae beset with yellowish pilosity; clouration reddish brown.

H e a d: About 1.4x as wide as long (50/36); clypeus long and produced anteriorly, genae thin adhering to clypeus; antenniferous lobes wide and inclined leaving a deep incision to clypeus, apices rounded; antennae 1.36x as long as width of head, segment I longest and thickest, curved at base, II and III of equal length and thinner, IV slightly longer than III with truncate pilose apex; length of antennal segments I/II/III/IV = 22/15/15/16; eyes small consisting of 8 ommatidia, placed at the end of a cylindrical anterolaterally and upward directed projection; postocular lobes sinuately converging posteriorly; vertex ridge-like laterally delimited by deep grooves; rostrum arising from a slit like atrium, rostral groove wide and open posteriorly, rostrum reaching ½ of prosternum.

P r o n o t u m 2.9x as wide as long (52/18); consisting of 2 (1+1) lateral sclerites, surface with oval callosities deeply depressed inbetween; anteriorly converging lateral margins carinate and expanded on anterior 2/3; anterior margin concave, posterior margin convex.

M e s o n o t u m More than 4x as wide as long (78/18) with large lateral elevated sclerites separated at middle by a flat ridge which continues to tergal plate; anterolateral angles with a flap-like expansion directed posterolaterally; anterior margin concave, posterior margin convex, fused to metanotum.

M e t a n o t u m: Completely fused to mtg I+II forming a continuous plate consisting of the median ridge and larger transverse sclerites of metanotum and smaller ones of mtg I+II laterally; the median ridge is narrowing posteriorly and meets a transverse carinate smaller ridge delimiting mtg II from tergal plate.

A b d o m e n:TergalplatewithmedianelevationsonmtgIII-V, slightly sloping laterally; lateral margin of deltg II-VII dorsally reflexed, pe-angles of deltg II+III with larger vertical tubercles, IV-V with smaller lateral tubercles, VI with a larger lateral and VII with a long upward directed lobe; deltg II and III not fused; tergite VII strongly raised medially for the reception of the large pygophore, ptg VIII long and posteriorly produced.

V e n t e r: Pro-, meso- and metasternum fused to each other and sternites I+II, transverse impressions mark the fusion lines; meso- and metasternum with a shallow round median impression; sternites III-VI depressed and deeply punctate anteriorly, smooth and elevated posteriorly; sternite VII large and rounded with smooth surface; metathoracic scent gland canal slit-like embedded in a larger oval elevated structure which extends to lateral margin of mesonotum but is not visible from above; spiracles II-VI ventral, VII palced on a larger tubercle but not visible from above, VIII terminal on ptg VIII.

L e g s: Umarmed, trochanters fused to moderately incrassate femora, tibiae straight, tarsi two-segmented, pulvillli not ascertained because of damaged legs.

M e a s u r e m e n t s: Length 4.2mm; ratio length / width 2.05; width of abdomen across tergite III 2.05mm; length of antennae 1.7mm.

E t y m o l o g y: Named after Cerro Grande where this interesting new taxon was found.

Figures

Photo 1-4: (1) Urucuca laticephala nov.gen., nov.sp. dorsal view; (2) ventral view; (3) Bahiamezira cerroensis nov.gen., nov.sp. dorsal view; (4) ventral view.