| Edwardzetes edwardsii (Nicolet, 1855) [Seniczak et al. 2016a] | LA: 297 × 165 PN: 357 × 215 DN: 468 × 294 TN: 598 × 350 AD: 801 × 494 | Both prodorsum and gastronotum porose, micropunctate | ro, le medium long, in long, all barbed | Short, clavate, head barbed | Short to medium long, barbed in larva, but smooth in nymphs | Large, elongate oval in both larva and nymphs, bears seta c 1 | Not developed | Not flattened, without ventral carina | ω2 inserted posterior to ω1; ω1 longer than ω2 |
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| Fuscozetes coulsoni Seniczak & Seniczak, 2020 [Seniczak & Seniczak 2020] | LA: 231 × 139 PN: 304 × 178 DN: 358 × 198 TN: 475 × 270 AD: 508 × 319 | Both prodorsum and gastronotum porose, micropunctate | ro and in long, le medium long, all barbed | Short, clavate, head barbed | In larva all setae medium long, barbed; in nymphs most setae smooth except barbed c 3 and h -series | Not developed in larva; large, oval in nymphs, bears seta c 1 | Three pairs, small, oval to elongate oval | Not flattened, without ventral carina | ω2 inserted posterior to ω1; ω1 longer than ω2 |
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| F. fuscipes (Koch, 1844) [Shaldybina 1978; Seniczak 1989b] | LA: 319 × 218 PN: 418 × 281 DN: 500 × 344 TN: 718 × 412 AD: 748 × 528 | Both prodorsum and gastronotum porose, micropunctate | ro, le short, in long, all barbed | Long, fusiform, head barbed | Short, thin, smooth | Large, irregular oval in both larva and nymphs; setae of c -series inserted on their own microsclerites | Three pairs; irregular oval in both larva and nymphs | Flattened, with ventral carina | ω2 inserted posterolateral to ω1; ω1 longer than ω2 |
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| F. kamchaticus Seniczak, Kaczmarek & Seniczak, 2016 [Seniczak et al. 2016b) | LA: 231 × 112 PN: 290 × 128 DN: 392 × 198 TN: 475 × 231 AD: 559 × 330 | Both prodorsum and gastronotum porose, micropunctate | ro, le short to medium long, in long, all barbed | Short, clavate, head barbed | In larva all setae medium long, barbed; in nymphs d -series short, thin, smooth, other setae long, barbed | Not developed in larva; large, oval in nymphs, bears seta c 1 | One pair, large, round to oval in both larva and nymphs | Not flattened, without ventral carina | ω2 inserted posterior to ω1; ω1 longer than ω2 |
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| F. pseudosetosus Shaldybina, 1975 [Shaldybina 1977] | LA: 284 × 172 PN:? DN:? TN:? AD: 688 × 473 | Both prodorsum and gastronotum porose, micropunctate | ro, le short, in long, all barbed | Long, fusiform, head barbed | Short, thin, smooth | Large, oval in both larva and nymphs; setae of c -series inserted on their own microsclerites | Four pairs; irregular oval in both larva and nymphs, and numerous microscletites on gastronotum | Flattened, with ventral carina | ω2 inserted posterior to ω1; similar in length |
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| M. crossleyi Behan-Pelletier, 2000 [Behan-Pelletier 2000] | LA: unknown PN: unknown DN: 472 ×? TN: 563 ×? AD: 597 × 383 | Both prodorsum and gastronotum microtuberculate, porose | ro, le medium long, in long, all barbed | Short, clavate, head strongly barbed | Short, c 3 thick, but smooth, c 2 barbed, other setae smooth | Large, oval in nymphs, bears seta c 1 | One pair; narrowly elongate in nymphs | Flattened, with ventral carina | Not studied |
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| M. interruptus Willmann, 1953 [Seniczak et al. 1993a] | LA: 303 × 206 PN: 349 × 235 DN: 395 × 252 TN: 623 × 398 AD: 755 × 470 | Prodorsum microporose, laterally microtuberculate, gastronotum nearly smooth | ro, le medium long, in long, all barbed | Medium long, fusiform, head barbed | Medium long, thin, smooth | Large, oval in both larva and nymphs, bears seta c 1 | Three pairs; narrowly elongate in nymphs | Not studied | Not studied |
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| M. meridianus Sellnick, 1928 [Seniczak 1989a; Seniczak et al. 1990] | LA: 277 × 186 PN: 375 × 233 DN: 450 × 257 TN: 575 × 375 AD: 630 × 400 | Both prodorsum and gastronotum micropunctate | ro, le medium long, in long, all barbed | Medium long, fusiform, head barbed | Medium long, c 3, dp and lp thick, barbed, other setae thin | Large elongate oval in both larva and nymphs, bears seta c 1 | Not studied | Not studied | Not studied |
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| M. mollicomus (Koch, 1839) [Shaldybina 1967; Seniczak 1989a] | LA: 243 × 169 PN: 312 × 216 DN: 356 × 260 TN: 469 × 319 AD: 525 × 340 | Both prodorsum and gastronotum micropunctate | ro, le medium long, in long, all barbed | Medium long, fusiform, head barbed | Short, thin, d - series, lm, lp, h 1, h 3 finely barbed, other setae smooth | Large, elongate oval in both larva and nymphs, bears seta c 1 | Not studied | Flattened, with ventral carina | Not studied |
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| M. paramollicomus sp. nov. [present study] | LA: 356 × 265 PN: 447 × 323 DN: 564 × 398 TN: 688 × 464 AD: 871 × 605 | Prodorsum tuberculate, porose, gastronotum foveolate | ro, le medium long, in long, all barbed | Short, clavate, head barbed | Long, thin, barbed | Large, elongate oval in both larva and nymphs, bears seta c 1 | Two pairs, narrow in both larva and nymphs | Flattened, with ventral carina | ω2 inserted anterior to ω1; similar in length |
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| M. sellnicki (Hammer, 1952) [Behan-Pelletier 1985] | LA: 260 ×? PN: 287 ×? DN: 359 ×? TN: 433 ×? AD: 437 × 276 | Both prodorsum and gastronotum porose, micropunctate | ro, le medium long, in long, all barbed, but ro thin, le and in thick | Short, clavate, head barbed | Short, thick in larva, but thin, smooth in nymphs except thick and barbed c 3 | Large, irregular oval in both larva and nymphs, bears seta c 1 | Not developed | Flattened, with ventral carina | ω2 inserted posterior to ω1; ω1 longer than ω2 |
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| M. stagnatilis (Hull, 1914) [Seniczak & Seniczak 2018] | LA: 297 × 198 PN: 377 × 274 DN: 481 × 332 TN: 605 × 429 AD: 708 × 488 | Prodorsum nearly smooth; gastronotum micropunctate | ro, le medium long, in long, all barbed | Short, clavate, head barbed | Short, thin, smooth | Large, elongate oval in both larva and nymphs, bears seta c 1 | Not developed | Flattened, with ventral carina | ω2 inserted anterolateral to ω1; ω2 longer than ω1 |
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| Sphaerozetes firthensis Behan- Pelletier, 1986 [Behan-Pelletier 1986] | TN: 456 ×? AD: 495 × 368 | Both prodorsum and gastronotum micropunctate | ro, le medium long, in long, all thick, barbed | Short, clavate, head barbed | Short, thin, smooth except long, thick, barbed c 3 | Large, irregular oval in tritonymph, bears seta c 1 | Not studied | Not studied | Not studied |
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| S. olympicus Seniczak, Seniczak & Sgardelis, 2016 [Seniczak et al. 2016c] | LA: 304 × 175 PN: 368 × 214 DN: 436 × 264 TN: 630 × 345 AD: 643 × 363 | Both prodorsum and gastronotum micropunctate | ro short, thin, le medium long, thick, in very long, all barbed | Short, clavate, head barbed | Short, thin, smooth except long h 1 | Not developed in larva; small, round in nymphs; setae of c -series inserted on their own microsclerites | Not developed | Not flattened | ω2 inserted posterior to ω1; ω2 longer than ω1 |
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| S. orbicularis (Koch, 1835) [Shaldybina 1968; Seniczak et al. 2016a] | LA: 238 × 131 PN: 337 × 182 DN: 390 × 248 TN: 552 × 314 AD: 664 × 403 | Both prodorsum and gastronotum porose, micropunctate | ro, le medium long, in long, all barbed | Medium long, clavate, head barbed | Short, thin, smooth | Large, elongate oval in both larva and nymphs, bears seta c 1 | Five pairs, small, oval to elongate oval | Not flattened | ω2 inserted posterior to ω1; ω2 longer than ω1 |
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