Yurikoazamiuma, Okajima & Masumoto, 2025
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publication ID |
https://doi.org/10.11646/zootaxa.5726.1.1 |
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publication LSID |
lsid:zoobank.org:pub:894F9D4B-2A99-4AC1-8C9A-828006840831 |
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persistent identifier |
https://treatment.plazi.org/id/03E28781-2418-5062-64C5-F8C1AFE7FB47 |
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treatment provided by |
Plazi |
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scientific name |
Yurikoazamiuma |
| status |
gen. nov. |
Yurikoazamiuma gen. nov.
Small-sized phlaeothripine species, with body somewhat flattened, belonging to the Haplothripini . Body relatively flat. Head longer than wide, with a pair of postocular setae situated near cheeks, all other setae minute. Eyes moderately developed, relatively far apart from each other; posterior ocelli situated at a level of anterior one-fourth of eyes. Antenna eight-segmented ( Figs 249 & 250 View FIGURES 241–253 ); segment VIII narrowly fused to segment VII, constricted basally; campaniform sensillum on segment II situated near apex; segment III with (1+1), segment IV with (1+2 +1) sense cones at least in type-species. Mouth cone short and rounded; maxillary stylets retracted into head capsule, close together medially, with maxillary bridge. Prothorax rather small; four pair of prothoracic setae well-developed, am reduced; notopleural suture incomplete ( Fig. 242 View FIGURES 241–253 ). Prosternal basantra much wider than long ( Fig. 243 View FIGURES 241–253 ), far apart from ferna. Mesopresternum reduced medially. Metathoracic sternopleural sutures present, furcal arms separated from one another ( Fig. 248 View FIGURES 241–253 ), without spinula. Fore tarsus with a small sub-basal tooth in addition to anterior distinct tooth that is curved and directed forwardly ( Fig. 244 View FIGURES 241–253 ). Fore wings slightly narrowed medially ( Fig. 257 View FIGURES 254–257 ), with duplicated cilia. Abdominal tergites II–VII each with two pairs of wing-retaining setae, posterior pairs on tergites III–VI well developed. Tube shorter than head, tapering and straight-sided. Terminal setae longer than tube.
Type-species. Yurikoazamiuma bidens sp. nov.
Comments. This genus is included in the Haplothripini , and closely related to Okajimathrips , Podothrips and Praepodothrips , and it is probably most closely related to Podothrips in having similar formed maxillary stylets and bridge. However, unlike Podothrips , Yurikoazamiuma has the basantra smaller and located far from ferna on the prosternum ( Fig. 243 View FIGURES 241–253 ). These four genera share the somewhat flattened body, metathoracic sternopleural sutures well-developed (cf. Fig. 247 View FIGURES 241–253 ) and metafurcal arms separated from each other (cf. Figs 248, 251 & 252 View FIGURES 241–253 ), and can be discriminated from each other by the following key. The flattened body with relatively short legs of these genera are probably an adaptation to living under the leaf sheaths of bamboo and/or grass, where they may be predaceous on certain coccids that also live there.
The genus name is dedicated to the late Yuriko Okajima. She was the wife of the first author and was well understanding of her husband’s research on thrips during her lifetime. She always spared no effort to support him behind the scenes. The Japanese word ‘azamiuma’ means ‘thrips’. Gender: feminine.
Key to four genera related to Podothrips View in CoL
1. Prosternal basantra largely developed, longer than wide (cf. Figs 101 View FIGURES 94–107 & 112 View FIGURES 108–115 ); fore tibia usually with an inner apical tubercle (cf. Fig. 111 View FIGURES 108–115 )............................................................................................ 2
-. Prosternal basantra not largely developed, wider than long (cf. Fig. 181 View FIGURES 178–190 & 243 View FIGURES 241–253 ); fore tibia without inner apical tubercle.... 3
2. Notopleural suture incomplete ( Fig. 100 View FIGURES 94–107 ); antennal segment VIII almost as long as segment VII ( Figs 104 & 107 View FIGURES 94–107 ), or longer; mouth cone rather pointed ( Fig. 98 View FIGURES 94–107 ), but small; prothoracic basantra often fused to ferna; mesopresternum eroded medially ( Fig. 101 View FIGURES 94–107 ); fore wing parallel sided ( Fig. 254 View FIGURES 254–257 ), but slender; tube distinctly constricted at apex ( Fig. 102 View FIGURES 94–107 ); pelta semicircular; male with a pair of pore plates on abdominal sternite VIII ( Fig. 103 View FIGURES 94–107 ).......................................... Okajimathrips View in CoL
-. Notopleural suture complete; antennal segment VIII usually shorter than segment VII (cf. Fig. 115 View FIGURES 108–115 ); mouth cone rounded; prothoracic basantra distinct from ferna (cf. Fig. 112 View FIGURES 108–115 ); mesopresternum transverse (cf. Fig. 158 View FIGURES 154–161 ); fore wing slightly constricted at middle (cf. Fig. 255 View FIGURES 254–257 ); pelta usually hat- or bell-shaped; tube not constricted at apex; male with no pore plate on abdominal sternite VIII.................................................................................. Podothrips View in CoL
3. Notopleural suture complete; maxillary stylets wider apart (cf. Fig. 187 View FIGURES 178–190 ), almost V-shaped, usually not reaching postocular setae; fore tarsus with a tooth; prosternal basantra close to ferna (cf. Fig. 181 View FIGURES 178–190 ); mesopresternum transverse (cf. Fig. 194 View FIGURES 191–200 )........................................................................................... Praepodothrips View in CoL
-. Notopleural suture incomplete ( Fig. 242 View FIGURES 241–253 ); maxillary stylets long and rather close together, reaching postocular setae; fore tarsus with a small sub-basal tooth ( Fig. 244 View FIGURES 241–253 ) in addition to anterior distinct tooth that is curved and directed forwardly; prosternal basantra far apart from ferna ( Fig. 243 View FIGURES 241–253 ); mesopresternum eroded medially................... Yurikoazamiuma gen. nov.
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