Meganannus

Weirauch, Christiane, Whorrall, Kyle, Knyshov, Alexander & Hoey-Chamberlain, Rochelle, 2018, Giant among dwarfs: Meganannus lewisi, gen. n. and sp. n., a new genus and species of minute litter bugs from Costa Rica (Hemiptera: Schizopteridae), Zootaxa 4370 (2), pp. 156-170: 159-163

publication ID

https://doi.org/10.11646/zootaxa.4370.2.4

publication LSID

lsid:zoobank.org:pub:38F5AF0E-915D-41C0-BAC7-A8D2711BA4FD

persistent identifier

http://treatment.plazi.org/id/D0D0B8EE-AE09-4653-9803-05501E3A5CD5

taxon LSID

lsid:zoobank.org:act:D0D0B8EE-AE09-4653-9803-05501E3A5CD5

treatment provided by

Plazi

scientific name

Meganannus
status

gen. n.

Meganannus  gen. n.

HTTP://ZOObANK.ORG/NOMENCLATURALACTS/D0D0B8EE-AE09-4653-9803-05501E3A5CD5 FIGURES 2–10View FIGURE2View FIGURE 3View FIGURE 4View FIGURE 5View FIGURE 6View FIGURE 7View FIGURE8View FIGURE 9View FIGURE 10

TypE spEciEs. Meganannus lewisi  sp. n.

Diagnosis. DISTINGUISHED AMONG SCHIZOPTERIDAE  bY THE LARGE bODY SIZE (~2.2MM), EYES AbOUT 1/3 AS WIDE AS SYNTHLIPSIS ( FIG. 3AView FIGURE 3), LAbIUM SHORT  , NOT SURPASSING MIDDLE COXA ( FIG. 3BView FIGURE 3) AND FOUR-SEGMENTED ( FIG. 5AView FIGURE 5), FOREWING WITH 3 CLOSED SUbMARGINAL CELLS ( FIG. 3EView FIGURE 3; CELLS DELIMITED bY R AND M, M AND CU, AND CU AND 1AN), SUbCOSTAL CELL (DELIMITED bY C+SC AND R/R+M) LONG AND NARROW, WITH bASAL THREE QUARTERS OF C+SC MARGIN WIDENED AND THICKENED AND DISTAL QUARTER NARROW, TRANSITION bETWEEN THE TWO SECTIONS MARKED bY NOTCH IN THE WING MARGIN AND PALE COLOR PATCH, TRAPEZOIDAL CELL WITH FIVE EMANATING VEINS, 1AN REACHING MARGIN OF WING, TARSAL FORMULA IN MALES 3-3-3, OVIPOSITOR WELL DEVELOPED.

Description. Male: MACROPTEROUS, WITH bOTH PAIRS OF WINGS SURPASSING TIP OF AbDOMEN, ELONGATE OVOID, LARGE (~2.2MM). Coloration ( FIG. 2A–CView FIGURE2). HEAD DARK bROWN WITH REDAbout RED EYES, YELLOWISH LAbIUM, YELLOWISH SCAPE AND PEDICEL AND LIGHT bROWN FLAGELLOMERES, THORAX AND AbDOMEN DARK bROWN, FOREWING WITH PATTERN OF DARK AND LIGHT YELLOWISH bROWN; LEGS YELLOWISH. Surface and Vestiture. HEAD EXCEPT CLYPEUS, bUCCULA, LAbRUM, LAbIUM, AND ANTENNA ( FIGS 3AView FIGURE 3, 5AView FIGURE 5) AND THORAX ( FIGS 3CView FIGURE 3, 5GView FIGURE 5) WITH DENSE COVER OF MICROTRICHIA AND EVENLY SPACED, FAIRLY SHORT, CURVED SETAE; LAbIUM, SCAPE AND PEDICEL, AND LEGS GLAbROUS WITH LONG, STOUT SETAE ( FIG. 5A, BView FIGURE 5); FLAGELLOMERES WITH VERY LONG SETAE ( FIG. 2AView FIGURE2); FORETIbIA WITH 2–3 STOUT AND LONG SPINE-LIKE SETAE ON POSTERIOR MARGIN; HIND TARSUS WITH ROW OF SLENDER, ERECT, CAPITATE SETAE ON POSTEROLATERAL SURFACE ( FIG. 4BView FIGURE 4); FOREWING VEINS WITH SHORT, CURVED SETAE ( FIG. 3C, DView FIGURE 3); VENTRAL SURFACE OF AbDOMEN DENSELY COVERED WITH MIX OF SHORT AND LONGER SETAE ( FIG. 6HView FIGURE 6). Structure. Head: ALMOST TRIANGULAR IN FRONTAL VIEW ( FIG. 3AView FIGURE 3), SYNTHLIPSIS AbOUT 3 TIMES AS WIDE AS EYE, EYE SMALL, SEMICIRCULAR IN FRONTAL VIEW, ALMOST CIRCULAR IN LATERAL VIEW; bUCCULA FORMING RING AROUND bASE OF LAbIUM, MAXILLARY PLATE DISTINCT AND COVERED WITH MICROTRICHIA, MANDIbULAR PLATE NOTAbout NOT IDENTIFIAbLE, CLYPEUS SLENDER ( FIG. 5AView FIGURE 5), ONLY SLIGHTLY RAISED AbOVE LEVEL OF GENA ( FIG. 5BView FIGURE 5); LAbIUM REACHING MIDAbout MID COXA, FIRST SEGMENT bULbOUS ( FIG. 5AView FIGURE 5), SECOND SEGMENT SLENDER, THIRD AND FOURTH SEGMENTS TAPERING, TOGETHER AbOUT AS LONG AS SECOND SEGMENT ( FIG. 5AView FIGURE 5); ANTENNA WITH SHORT SCAPE AND PEDICEL AND LONG FLAGELLOMERES ( FIG. 2A, BView FIGURE2). Thorax: WITH PRONOTUM AbOUT HALF AS LONG AS WIDE, LATERAL MARGIN CONVEX, HUMERAL ANGLE ROUNDED, POSTERIOR MARGIN IN DORSAL VIEW SLOPING TO LATERAL MARGIN OF SCUTELLUM AND WITH SLIGHTLY INDENTED MEDIAN PART bORDERING SCUTELLUM, PRONOTAL COLLAR bROAD ( FIG. 2AView FIGURE2), PRONOTUM IN LATERAL VIEW SINUOUS ( FIG 2CView FIGURE2), METATHORAX WITHOUT ObVIOUS GLAND EVAPORATORY STRUCTURES, METEPIMERAL SUPRACOXAL LObE ROUNDED. Legs: LONG AND SLENDER, FORE TIbIA ONLY SLIGHTLY EXPANDED AT APEX ( FIG. 5BView FIGURE 5), TIbIAL COMb PRESENT, TARSAL FORMULA 3-3- 3 ( FIG. 5C, E, HView FIGURE 5), WITH FORE- AND MIDTARSUS SHORT AND INCRASSATE ( FIG. 5EView FIGURE 5), HINDTARSUS SLENDER ( FIG. 5HView FIGURE 5), FIRST TARSOMERE VERY SHORT, SECOND AND THIRD SUbEQUAL ( FIG. 5E, HView FIGURE 5), PRETARSUS WITH AROLIUM ON FORE- AND MIDLEG ( FIG. 5DView FIGURE 5), WITH DORSAL SCLERITE AND VENTRAL MEMbRANOUS LObE; VENTRAL CLAW SURFACE WITH ROW OF STRONG, POINTED PROCESSES ( FIG. 5FView FIGURE 5), SIMILAR TO SITUATION IN Carinatala  ( HILLAbout HILL 2015). Forewing: FOREWING WITH 3 CLOSED SUbMARGINAL CELLS ( FIG. 2View FIGURE2; CELLS DELIMITED bY R AND M, M AND CU, CU AND 1 AN), SUbCOSTAL CELL DELIMITED bY C+SC AND R/R+M LONG AND NARROW, WITH bASAL THREE QUARTES OF C+SC MARGIN WIDENED AND THICKENED AND DISTAL QUARTER NARROW, TRANSITION bETWEEN THE TWO SECTIONS MARKED bY NOTCH IN WING MARGIN ( FIG. 3EView FIGURE 3), R DISTINCTLY RAISED PROXIMALLY TO LEVEL OF NOTCH, bASAL CELL NARROW AND ELONGATE, AbOUT TWICE AS LONG AS TRAPEZOIDAL CELL, TRAPEZOIDAL CELL WITH FIVE EMANATING VEINS, RADIAL CELL SLIGHTLY WIDER AND SHORTER THAN DISCAL CELL, DISCAL CELL SLIGHTLY EXPANDED DISTALLY, CUbITAL CELL LARGE, LONG, AND CURVED, 1 AN REACHING MARGIN OF WING, CORIUM (I.E. AREA SLIGHTLY MORE HEAVILY SCLEROTIZED COMPARED TO THE DISTAL MEMbRANOUS PART OF THE WING) RESTRICTED TO WIDENED AND RAISED PROXIMAL PARTS OF C+SC, R+M, CU, 1 AN AND 2 AN, REMAINDER OF FOREWING MEMbRANOUS. Abdomen and genitalia: PREGENITAL AbDOMEN FAIRLY SYMMETRICAL EXCEPT ENLARGED RIGHT SIDE OF STERNITES 2+3 AND SEGMENT 4 WITH POUCH-LIKE MODIFICATION ON RIGHT SIDE OF SEGMENT ( FIGS 6HView FIGURE 6, 9AView FIGURE 9); SPIRACLES LOCATED ON STERNITES 6 AND 7 ( FIG. 9AView FIGURE 9), AND ON LATERAL PROjECTIONS OF TERGITE 8 ( FIGS 7EView FIGURE 7, 9AView FIGURE 9); SCARS OF DORSAL AbDOMINAL GLANDS PRESENT ON TERGITE 7; STERNITE 7 LARGE ( FIG. 4BView FIGURE 4); TERGITE 8 WITH LONG APPENDAGE ( FIGS 6B, C, E, F,HView FIGURE 6, 7EView FIGURE 7, 8A, DView FIGURE8); AEDEAGUS ( FIG. 8CView FIGURE8) WITH bASAL PLATES, COMPLEX MIDDLE PORTION WITH LARGE HEAVILY SCLEROTIZED CONjUNCTIVAL APPENDAGE ( FIGS 6BView FIGURE 6, 8A, 8CView FIGURE8), AND LONG, THIN VESICA WITH 8 TO 9 COILS ( FIGS 6IView FIGURE 6, 8AView FIGURE8), RIGHT PARAMERE ELONGATE, SLENDER, AND SINUOUS ( FIGS 6E, GView FIGURE 6, 7BView FIGURE 7), LEFT PARAMERE AbOUT HALF AS LONG AS WIDE WITH TAPERING PROCESS ( FIG. 7CView FIGURE 7); ANOPHORIC PROCESS LONG AND RELATIVELY WIDE, ORIENTED ANTERIAD, WITH SEVERAL RIDGES AND FOLDS ( FIGS 6A, HView FIGURE 6, 8A, BView FIGURE8).

Female. SIMILAR TO MALE IN COLORATION, SURFACE AND VESTITURE, SLIGHTLY LARGER THAN MALE (~2.3–2.5MM), TARSAL FORMULA 2-2-3, AROLIA AbSENT ON FORE- AND MIDTARSI, FORE- AND MIDTARSI SOMEWHAT MORE SLENDER THAN IN MALE, DISTINCTLY STOUTER AND SHORTER THAN HINDTARSUS. Genitalia: OVIPOSITOR FORMED bY INTERLOCKED GONAPOPHYSES 8 AND 9, AND STYLOIDS; GONAPOPHYSIS 8 WITH SEVERAL SPINE-LIKE SETAE ( FIGS 7AView FIGURE 7, 9B, CView FIGURE 9), GONAPOPHYSIS 9 VERY SLENDER WITH WIDENED APEX; STYLOIDS REPRESENTED bY FOUR SCLERITES MEDIAN TO GONAPOPHYSIS 8 IN FIG. 9BView FIGURE 9; SPERMATHECAL GLAND SPHERICAL; SPERMATHECAL GLAND DUCT STRAIGHT; SPERMATHECAL RESERVOIR ELONGATE; SPERMATHECAL DUCT VERY LONG AND COILED ( FIG. 9B, CView FIGURE 9).

Etymology. “ MEGA ” FROM MÉGAS ( GREEK) MEANING GREAT OR LARGE, AND “NANNUS” AFTER THE GREEK KING OF THE SAME NAME (NANNUS) AND RESEMbLING NâNOS MEANING “ DWARF ” ( GREEK). THE GENDER IS MASCULINE.

Distribution. KNOWN FROM COSTA RICA AND PERUAbout PERU.

Notes. IN ADDITION TO THE SPECIES FROM COSTA RICA DESCRIbED bELOW, WE HAVE RECOVERED ONE FEMALE SPECIMEN FROM PERU FROM SWEEP SAMPLES HELD IN THE HERATY LAb AT UCRAbout UCR ( PERU: MADRE DE DIOS: LOS AMIGOS BIOL. STAAbout STA. TRAIL 13, 12.57138°S 70.09616°W, 226 m, 27 Dec 2010, J. Heraty, 1♀; UCRAbout UCR _ ENT 00077887View Materials). Based on difference in COLOR PATTERN OF FEMALES FROM COSTA RICA AND THE SINGLETON FEMALE FROM PERU ( FIG. 2View FIGURE2; ALSO PARTIALLY DUEAbout DUE TO THE FACT THAT SPECIMENS WERE IMAGED DRY OR IN ETHANOL, RESPECTIVELY) AS WELL AS THE GEOGRAPHIC DISTANCES bETWEEN THE COLLECTING LOCALITIES, WE SUSPECT THAT THESE FEMALES MAYAbout MAY REPRESENT DIFFERENT SPECIES. GIVEN THE IMPORTANCE OF MALE GENITALIC CHARACTERS FORAbout FOR SPECIES DIAGNOSIS AND IDENTIFICATION IN MOST SCHIZOPTERIDAE  , WE REFRAIN FROM DESCRIbING THE SINGLE FEMALE SPECIMENS FROM PERUGoogleMaps  .

RED

University of Redlands

NOT

Nottingham City Natural History Museum

MID

Middlebury College

HILL

Sir Harold Hillier Gardens

PERU

Universit� di Perugia

UCR

University of California

STA

University of St. Andrews

DUE

University of Dundee

MAY

Adygean State University

FOR

Forssa Museum of Natural History