Revision of the Shore-fly Genera Parahyadina Tonnoir and Malloch and New Zealand Hyadina Haliday (Diptera: Ephydridae) Mathis, Wayne N. Zatwarnicki, Tadeusz Zootaxa 2019 2019-06-26 4623 3 401 440 Mathis & Zatwarnicki, 2019 Mathis & Zatwarnicki 2019 [151,434,153,180] Insecta Ephydridae Parahyadina Animalia Diptera 22 423 Arthropoda species edmistoni sp. nov.  ( Figs. 28, 33–36, Map 7)   Diagnosis.This species is distinguished from congeners by the following combination of characters: Adults. Small to moderately small shore flies, body length 1.40–2.20 mm.  Head( Fig. 28): Lateroclinate fronto-orbital seta evident but variable, weakly or well developed, if well developed then basal diameter comparable or only slightly reduced in comparison to basal diameters of lateral vertical setae.   Thorax( Fig. 28): 2 pairs of posterior dorsocentral setae, anterior seta shorter than posterior seta. Wing hyaline; costal section II about equal in length to costal section III; costal vein ratio 0.95–1.05; M vein ratio 0.24–0.39   MAP 6.  Parahyadina debilis.  Abdomen:Tergites 3–5 with anterior margin extended ventroposteriorly as a pointed, well-sclerotized process; male tergite 5 tucked obliquely ventrad from plane of tergite 4. Male terminalia( Figs. 33–36): Epandrium in posterior view ( Fig. 33) a relatively narrow, inverted, U-shaped band, arms slightly flared laterally and with medial extension for from cup-like receptacle for ventral portion of cercus; surstyli in posterior view ( Fig. 33) curved medially, tapered from base to apex, apical 2/3 almost parallel sided, apex truncate, ventral half bearing setulae laterally, lacking a prominent apical seta, in lateral view ( Fig. 34) epandrium straight, narrow, swollen at fusion with surstylus, surstylus swollen basally, thereafter abruptly narrowed, apical extension parallel sided, angularly truncate apically, bearing numerous setulae on ventral portion; cerci in posterior view ( Fig. 33) obovate, tapered to rounded point dorsally, base broadly rounded, in lateral view ( Fig. 34) semihemispherical; aedeagus in lateral view ( Fig. 36) slipper-shaped with narrow, slightly sinuous tongue, apex bluntly rounded, in ventral view ( Fig. 35) pear-shaped, wider basally, apical half narrowed, truncate at apex; phallapodeme in lateral view ( Fig. 36) with thumb-like, narrow extension toward aedeagal base, and much shorter extension toward hypandrium, keel robustly developed, elongate, rectangular, in ventral view ( Fig. 35) symmetric but unequal hour-glass shaped apical dagger-shaped, projection, base wide, rounded posteriorly, thereafter apically abruptly narrowed then with moderately wide cross piece, each lateral extension triangular, length of narrow, apical extension slightly greater than width of cross piece, tapered to narrow point; gonite/hypandrium broadly fused, in lateral view ( Fig. 36) generally forming L-shaped structure with apical arm broader and shorter than basal arm, external angle of L with a digitiform process, base with shallow bifurcation, in ventral view ( Fig. 35) almost as wide as long, anterior margin broadly truncate, with subanterior lateral knob-like projections, then lateral margins shallowly concave, thereafter posteriorly with a subapical, short protrusion, posterior margin as 2 medially curved, parallel-sided digitiform processes, one process from each side that nearly touch posteromedially   Type Specimen.The holotypemale is labeled “ New Zealand. N[orth] I[sland], ND, Hailes Road, quarry 37°[]sic, should be 35°] 31.1’S, 174°25.8’E[,] 19 February 1998, V. Hollmann-Schirmacher/ USNMENT 00250355 [plastic bar code label]/ HOLOTYPE ♂  Parahyadina edmistoniMathis & Zatwarnicki NZAC[red].” The holotypeis double mounted (minuten in a plastic block), is in excellent condition, and is deposited in the NZAC. Ten paratypes( 6♂, 4♀; USNM) bear the same label data as the holotypeexcept for some ( 4♂, 3♀), W. N. Mathis was the collector.   .     Typelocality. New Zealand.  North Island.ND, Hailes Road (quarry 35°31.1’S, 174°25.8’E).  Other specimens examined.   NORTH ISLAND. AK: Huia Dam( 36°59.7’S, 174°33.9’E),  5–18 Feb 1998, W. N. Mathis( 1♂; USNM);  Karekareswamp ( 37°0.8’S, 174°28.8’E),  5 Feb 1989, V. Hollmann( 1♂; NZAC);  Mangere( 36°58.7’S, 174°45.8’E),  6 Feb 1998, V. Hollmann, W. N. Mathis( 3♂; NZAC, USNM);  Waiheke Island, Palm Beach( 36°46.7’S, 175°02.5’E),  27 Aug 1977, L. L. Deitz( 1♂; NZAC);  Whatipo( 37°02.2’S, 174°30’E),  5 Feb 1998, V. Hollmann( 1♂; NZAC).  BP: Paradise Valley( 38°07.9’S, 176°09.9’E),  7 Feb 1998, W. N. Mathis( 1♀; USNM);  Paradise Valley, Rotoroa( 38°07.7’S, 176°45.8’E),  6 Feb 1998, V. Hollmann( 1♂, 1♀; NZAC).  TO: Lake Otamangakau( 39°0.4’S, 175°37.1’E;  610 m),  5 Jan 2004, W. N. Mathis( 3♀; USNM).    SOUTH ISLAND. MC:  Christchurch( Styx Mill Reserve; 43°27.8’S, 172°36.8’E;  9 m),  2 Feb 2004, W. N. Mathis( 1♂, 3♀; USNM); Christchurch ( Styx Mill Reserve; 43°28.1’S, 172°36.4’E),  17 Oct 2002, D. and W. N. Mathis( 1♂, 1♀; USNM);  Lake Pearson( 43°05.6’S, 171°46.8’E;  612 m);  3 Feb 2004, W. N. Mathis( 1♀; USNM).    MK: Ahuiri Valley(near Ben Avon Stream; 44°24.5’S, 169°37.5’E),  2 Mar 1976, L. L. Deitz( 1♀; NZAC).   NN: Graham Stream( 41°11.9’S, 172°48.6’E),  12 Feb 1998, W. N. Mathis( 1♂; USNM); Maitai Dam( 41°17.6’S, 173°22.1’E),  11 Feb 1998, W. N. Mathis( 1♂; USNM); Nelson(airport; 41°18.2’S, 173°13.6’E),  11 Feb 1998, V. Hollmann, W. N. Mathis( 5♂, 9♀; NZAC, USNM).   Distribution( Map 7). Australasian/Oceanian: New Zealand. North Island (AK, BP, ND, TO), South Island (MC, MK, NN, OL).   Etymology.The species epithet,  edmistoni,is a genitive Latin patronym to honor Father James F. Edmiston, O. F. M., Ph.D., a former colleague in the study of shore flies and a personal friend. Jim passed away on Sunday, May 18, 2008(born 18 July 1954), and is still greatly missed. Before his untimely death, Jim had intended to participate in this study, primarily in adding a molecular analysis of the included species.   Remarks.Like specimens of  H. breva,the lateroclinate fronto-orbital seta is weakly developed, in some specimens almost setula-like.Also like  H. breva,the structures of the male terminalia are unique ( Figs. 33–36) and unlike the pattern for most congeners. The surstyli, for example, are robustly developed, elongated, mostly parallel sided, and are shallowly curved medially. The surstylar apex is also obliquely truncated and not acute. The keel of the phallapodeme ( Fig. 36) is also elongated and in lateral view appears rectangular in shape. 2270822895 [199,1240,1291,1318] North Island. ND New Zealand -35.518333 North Island. 119 174.43 24 425 1 holotype 2270822908 1998-02-05 1998-02-18 1998-02-05 NORTH, USNM W. N. Mathis Iceland -36.995 Huia Dam 117 174.565 24 425 1 1 2270822957 [490,1432,1363,1390] 1989-02-05 NZAC V. Hollmann Iceland -37.013332 Karekare 117 174.48 24 425 1 1 2270822943 [151,1245,1399,1426] 1998-02-06 NZAC, USNM V. Hollmann & W. N. Mathis Iceland -36.978333 Mangere 117 174.76334 24 425 3 3 2270822939 1977-08-27 NZAC L. L. Deitz Iceland -36.77833 Waiheke Island 118 175.04167 Palm Beach 24 425 1 1 2270822940 1998-02-05 NZAC V. Hollmann Iceland -37.036667 Whatipo 744 174.5 24 425 1 1 2270822950 1998-02-07 USNM W. N. Mathis Iceland -38.131668 Paradise Valley 117 176.165 24 425 1 1 2270822917 [256,1314,1507,1534] 1998-02-06 NZAC V. Hollmann Iceland -38.128334 Paradise Valley 117 176.76334 Rotoroa 24 425 2 1 1 2270822933 2004-01-05 USNM W. N. Mathis Iceland 610 -39.006668 Lake Otamangakau 116 175.61833 24 425 3 3 2270822937 [199,414,1579,1606] SOUTH Iceland ISLAND 24 425 1 2413159291 2004-02-02 USNM Iceland -43.463333 172.61333 24 425 2413159297 2002-10-17 USNM Iceland -43.468334 172.60667 24 425 2413159283 [449,1433,1651,1678] 2004-02-03 USNM Iceland -43.093334 171.78 24 425 2413159300 [151,1375,1687,1714] 2002-10-17 2004-02-03 2002-10-17 MK W. N. Mathis & D. and W. N. Mathis Iceland Lake Pearson 9 true -43.093334 Christchurch 114 171.78 Styx Mill Reserve 24 425 1 1 2413159301 1976-03-02 1998-02-12 1998-02-11 NN L. L. Deitz Iceland Nelson true -44.408333 Ahuiri Valley 113 169.625 Ben Avon Stream 24 425 1 9 7