Scatellini

Costa, Daniel N. R., Mathis, Wayne N., Marinoni, Luciane & Sepúlveda, Tatiana A., 2024, Phylogeny and taxonomy of the shore-fly tribe Scatellini (Diptera: Ephydridae: Ephydrinae), Zoologia (e 23100) 41, pp. 1-35 : 10

Key to genera and subgenera of Scatellini

1. Acrostichal setae of mesonotum extended to anterior margin of scutellum, setae subequal in length........... 2

1’. Acrostichal setae of mesonotum not extended to anterior margin of scutellum, usually with 1 larger, sutural acrostichal seta ( Scatella , in part) ............................... 11

2. Arista shorter than basal flagellomere. Frontal vitta as high as wide .................................................................... 3

2’. Arista longer than basal flagellomere. Frontal vitta wider than high .............................................................. 4

3. Pedicel with a long dorsal seta, subequal to length of arista. Apical scutellar seta longer than basal seta ( Figs 54, 55 , 82, 83 ) ......................... Scatella (Synhoplos) Lamb

3’. Pedicel with short dorsal seta, shorter than the length of arista. Apical scutellar seta short, same length of basal seta .................................................. Tauromima Papp

4. Costa short, extended to or slightly beyond apex of vein R 4+5 ( Figs 19, 22 ) .......................... Scatophila Becker

4’. Costa longer, extended to apex of vein M 1 .................. 5

5. Arista pectinate above ( Figs 16 , 24, 25, 47 , 74–81 )........ ............................................................. Philotelma Becker

5’. Arista bare to macropubescent .................................... 6

6. Only one lateroclinate fronto-orbital seta present. Wing infuscate, darker on anterior margin and lighter on posterior margin with distinctive pattern of numerous pale spots ( Figs 10 , 68–73 ) .. Limnellia Malloch

6’. Two or three lateroclinate fronto-orbital setae present. Wing hyaline to faintly infuscate or with pattern of a few pale spots.......................................................... 7

7. Gena with a long distinct seta, longer and stronger than genal setulae. Postsutural supra-alar seta subequal to length of postalar seta ( Figs 12, 14 ) .................. ........................................ Scatella (Parascatella) Cresson

7’. Gena without a long, strong seta, with a series of uniform fine setulae. Postsutural supra-alar seta shorter than half length of postalar seta .................................. 8

8. Posterior notopleural seta inserted much farther above ventral notopleural suture than anterior seta 9

8’. Anterior and posterior notopleural setae equidistant from ventral notopleural suture ................................ 10

9. A strong, conspicuous, dorsally curved seta toward anterodorsal corner of anepisternum; prescutellar acrostichal setae long, conspicuous ( Figs 9 , 32, 33, 40–43 ) ... ........................................................... Haloscatella Mathis

9’. Seta toward anterodorsal corner of anepisternum indistinguishable from surrounding setae; prescutellar acrostichal seta subequal to length of other acrostichal setae........................................... Amalopteryx Eaton

10. Posterior fronto-orbital seta closer to medial vertical seta than to anterior fronto-orbital seta. Frontal vitta shiny ( Fig. 36 )................................. Thinoscatella Mathis

10’. Posterior fronto-orbital seta closer to anterior fronto-orbital seta than to medial vertical seta. Frontal vitta microtomentose, appearing dull ( Figs 5 , 31, 38, 39 , 84, 85 ).......................................... Lamproscatella Hendel

11. Scutellum with three pairs of scutellar setae, these subequal in length; mesonotum covered by scattered setulae, not forming a row of acrostichal and intra-alar setae ( Fig. 3 ) ................ Scatella (Teichomyza) Macquart

11’. Scutellum with two pairs of scutellar seta, basal pair shorter than apical pair; mesonotum with acrostichal and intra-alar setae present, in small rows................ 12

12. Wing slightly infuscate with few to several distinct pale spots. Sutural acrostichal seta present, conspicuously longer than other acrostichal setae (if absent, presutural dorsocentral seta present) ( Figs 6–8 , 15 , 27–30, 46 , 58–62 ).................. Scatella (Scatella) Robineau-Desvoidy

12’. Wing hyaline, without pale spots. Sutural acrostichal seta present, weak or indistinguishable than other acrostichal setae ............... Scatella (Apulvillus) Malloch

Figures

Figures 48–62. Scatella fusca: (48) head, anterior; (49) head, lateral; (50) thorax, dorsal; (51) male mid leg, posterior; (52) epandrium and cerci posterior; (53) male internal terminalia, lateral.Scatella (Synhoplos) sturdeeanus: (54) head, lateral; (55) thorax, dorsal; (56) epandrium and cerci, posterior; (57) male terminalia, lateral. Scatella (Scatella) curtipennis: (58) head, anterior; 59, head, lateral; (60) thorax, dorsal; (61) epandrium and cerci, posterior; (62) male terminalia, lateral.

Figures 63-85. Male terminalia: (63–65) Notiocoenia acutella; (66–67) Halmopota mediterranea; (68–70)Limnellia huachuca; (71–73) Limnellia itatiaia; (74-77) Philotelma nigripenne; (78–81) Philotelma rossii; (82–83) Scatella (Synhoplos) neglectus; (84–85) Lamproscatella occidentalis.

Figures 10–23. Head, wing and legs characters: (10) Limnellia sp., head anterior; (11) Scatella (Scatella) sp., head anteri- or; (12) Scatella (Parascatella) sp., head anterior; (13) Hyadina sp., head lateral; (14) Scatella (Parascatella) pilifera, head anterior; (15) Scatella (Scatella) stagnalis, mouth parts; (16) Philotelma sp., head lateral; (17) Physemops nemorosus, head anterior; (18)Ephydra riparia, mouth parts; (19) Scatophila caviceps, wing; (20) Scatella (Scatella) stagnalis, wing; 21, Dagus rostratus, wing; (22) Scatophila mesogramma, male, mid femur posteroventral; (23) Scatella (Scatella) stagnalis, male, fore femur anteroventral.

Figures 24–47.Abdominal sternites and terminalia: (24)Philotelma sp.,female; (25)Philotelma sp.,male;(26)Ephydra (Ephydra) riparia, female; (27) Scatella (Scatella) stagnalis, female; (28) Scatella (Scatella) tenuicosta, female; 29, Scatella (Scatella) tenuicosta, male; (30) Scatella (Scatella) paludum, male; (31) Lamproscatella sibilans, epandrium and cerci, posterior; (32) Haloscatella arichaeta, epandrium andcerci,posterior;(33)Haloscatella karekare,epandrium and cerci,posterior;(34)Hyadina sp., aedeagus lateral;(35)Parydra aquila, aedeaguslateral;(36)Thinoscatella lattini, internal structures ofmaleterminalia (aedeagus[shaded], phallapodeme, gonite+hypandrium), lateral; (37) Diedrops steineri, aedeagus, lateral; (38)Lamproscatella sibilans, internal structures of maleterminalia (aedeagus [shaded],phallapodeme,gonite+hypandrium),ventral;(39)Lamproscatella sibilans, internal structuresof maleterminalia(aedeagus[shaded],phallapodeme,gonite+hypandrium), lateral;(40)Haloscatella arichaeta epandrium and cerci, lateral; (41) Haloscatella arichaeta, internal structures of male terminalia (aedeagus [shaded], phallapodeme, gonite+hypandrium),lateral;(42)Haloscatellakarekare,internal structures of maleterminalia (aedeagus[shaded],phallapodeme, gonite+hypandrium), ventral; (43) Haloscatella karekare, internal structures of male terminalia (aedeagus [shaded], phallapodeme, gonite+hypandrium), lateral; (44) Paracoenia bisetulosa, ventral receptacle lateral; (45) Notiocoenia paniculate, ventral receptacle lateral; (46)Scatella (Scatella) stagnalis, ventral receptacle lateral; (47)Philotelma defectum, ventral receptacle lateral.

Figures 3–9. (3)Scatella (Teichomyza) fusca, head anterior; (4) Scatella (Synsoplos) sturdeeanus, head lateral; (5)Lamproscatella cephalotes, head dorsal; (6–8) Scatella (Scatella) stagnalis, thorax lateral; (7) thorax dorsal; (8) female, abdomen lateral; (9) Haloscatella arichaeta, thorax dorsal. Abbreviations: anepst, anepisternum; ar, arista; d ped s, dorsal pedicel seta; dc s, dorsocentral seta; fr-orb s, fronto-orbital seta; fr vit, frontal vitta; gn s, genal seta; ial s, intra-alar seta; kepst, katepisternum; npl s, notopleural seta; p spal s, posterior supra-alar seta; pprn lb, postpronotal lobe; prepst, proepisternum; presut acr s, presutural acrostichal seta;presut spal s, presutural supra-alar seta;sctl, scutellum; spal s,supra-alar seta;sctl s,scutellar seta.