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Figures 66–71. Stenotothorax schneppi, n in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)

Figures 66–71. Stenotothorax schneppi, n. sp. 66) Dorsal habitus. 67) Ventral habitus. 68) Lateral habitus. 69) Oblique anterior view head to elytral base. 70) Epipharynx. 71) Male genitalia, lateral view.

Figures 10–15. Stenotothorax spp. characters. 10–14 in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)

Figures 10–15. Stenotothorax spp. characters. 10–14) Stenotothorax pronotal and elytral bases. 10) S. niviviator, complete pronotal marginal bead, rounded strial margin. 11) S. odontomonteus, reduced pronotal marginal bead, rounded strial margin (inset shows cross section of rounded margin). 12) S. lahontanensis, pronotal marginal bead absent, sharply edged strial margin. 13) S. winnemucca, pronotal marginal bead absent, sharply edged strial margin. 14) S. wintoni, pronotal marginal bead absent, sharply edged strial margin, note striae also wider towards base (inset shows cross section of sharp edge). 15) S. wintoni, fused elytra removed exposing strap-like hind wings.

Figures 1–9. Stenotothorax spp. characters. 1–2 in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)

Figures 1–9. Stenotothorax spp. characters. 1–2) Extreme age-related wear on Stenotothorax spp.; note lack of clypeal teeth, smoothing and dulling of clypeal surface granulations, and reduction of protibiae. 1) S. wintoni. 2) S. schneppi. 3) Deformity on a S. woodleyi, note apparent tubercle is not centered on head. 4–9) Stenotothorax species heads. 4) S. niviviator. 5) S. odontomonteus. 6) S. nevadensis (Nevada, Washoe Co., Washoe Lake). 7) S. winnemucca. 8) S. lahontanensis, narrow head. 9) S. wintoni, broad head.

Figures 16–23 in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)

Figures 16–23. Stenotothorax protibiae dorsal (top) and ventral (bottom) surfaces. Note abrasions on ventral surfaces. 16, 20) S. ovipennis, lacking secondary dorsal row of setae. 17, 21) S. wintoni, with secondary dorsal row of setae proximal of basal tooth. 18, 22) S. comosus, with coarse setose punctures on ventral surface, female with sparse setae on medial margin. 19, 23) S. winnemucca, with coarse setose punctures on ventral surface, male with denser setae on medial margin. Arrow points to secondary row of setae.

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Linked collectors and determiners for: New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae).

Natural history specimen data linked to collectors and determiners held within, "New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/ffcbe161-01d4-43e5-9ea8-4b4b5a70551e">https://bionomia.net/dataset/ffcbe161-01d4-43e5-9ea8-4b4b5a70551e</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/ffcbe161-01d4-43e5-9ea8-4b4b5a70551e">https://gbif.org/dataset/ffcbe161-01d4-43e5-9ea8-4b4b5a70551e</a>. Formatted as a Frictionless Data package.

Figures 60–65. Stenotothorax lahontanensis, n in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)

Figures 60–65. Stenotothorax lahontanensis, n. sp. 60) Dorsal habitus. 61) Ventral habitus. 62) Lateral habitus. 63) Oblique anterior view head to elytral base. 64) Epipharynx. 65) Male genitalia, lateral view.

Figures 48–53. Stenotothorax odontomonteus, n in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)

Figures 48–53. Stenotothorax odontomonteus, n. sp. 48) Dorsal habitus. 49) Ventral habitus. 50) Lateral habitus. 51) Oblique anterior view head to elytral base. 52) Epipharynx. 53) Male genitalia, lateral view.

Figures 54–59. Stenotothorax winnemucca, n in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)

Figures 54–59. Stenotothorax winnemucca, n. sp. 54) Dorsal habitus. 55) Ventral habitus. 56) Lateral habitus. 57) Oblique anterior view head to elytral base. 58) Epipharynx. 59) Male genitalia, lateral view.

Figures 42–47. Stenotothorax wintoni, n in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)

Figures 42–47. Stenotothorax wintoni, n. sp. 42) Dorsal habitus. 43) Ventral habitus. 44) Lateral habitus. 45) Oblique anterior view head to elytral base. 46) Epipharynx. 47) Male genitalia, lateral view.

Figures 36–41. Stenotothorax smilodon, n in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)

Figures 36–41. Stenotothorax smilodon, n. sp. 36) Dorsal habitus. 37) Ventral habitus. 38) Lateral habitus. 38) Oblique anterior view head to elytral base. 40) Epipharynx. 41) Male genitalia, lateral view.

Figures 24–29 in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)

Figures 24–29. Stenotothorax species, head and pronotum. 24) S. lanei. 25) S. mcpeaki. 26) S. washtucna. 27) S. woodleyi, typical pronotum. 28) S. woodleyi, from Rufus, OR. 29) S. winnemucca, ventral protibia, female paratype from type locality.

Figures 30–35. Stenotothorax niviviator, n in New species of Stenotothorax Schmidt from the northwestern United States (Coleoptera: Scarabaeidae: Aphodiinae)

Figures 30–35. Stenotothorax niviviator, n. sp. 30) Dorsal habitus. 31) Ventral habitus. 32) Lateral habitus. 33) Oblique anterior view head to elytral base. 34) Epipharynx. 35) Male genitalia, lateral view.