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1(0). Antennae with 5 segments (fig.1b)............................. 2
Antennae with 6 segments (fig.1a)............................. 6
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Fig.1. |
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2(1). Scales hyaline and fusiform (fig.2a); scales absent from
antennae and furca............................... Mastigoceras
Scales strongly and apically rounded or truncate (fig.2b);
scales present on antennae and furca........................ 3
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Fig.2. |
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3(2). Antennal segment 5 and 4 clearly annulate (fig.3). Verhoeffiella
Antennal segment 5 annulate only.............................. 4
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Fig.3. |
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4(3). First abdominal segment with at least 1 + 1 macrochaetae
(fig.4)..................................................... 5
First abdominal segment without macrochaetae........ Heteromurus
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Fig.4. |
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5(4). Dental spines absent............................ Heteromurtrella
Dental spines present (fig.5)........................ Alloscopus
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Fig.5. |
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6(1). Fully developed scales fusiform (fig.2a)....... Dicranorchesella
Fully developed scales rounded or truncate (fig.2b)........... 7
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7(6). Prelabral setae bifurcate (fig.6).......... Pseudodicranocentrus
Prelabral setae not bifurcate.................... Dicranocentrus
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Fig.6. |
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