Open Access
Table 2
Caballerotrematidae head collar spines comparative measurements.
| Species | Caballerotrema brasiliense | C. brasiliense | C. brasiliense (USNM1339898 as Himasthla piscicola) | Alobophora annulata n. comb. | Alobophora sandrae n. gen., n. sp. |
|---|---|---|---|---|---|
| Host | Arapaima gigas | A. gigas | A. gigas | Electrophorus cf. varii | A. gigas |
| [44] | Present study | Present study | [11] | Present study | |
| Corner spines | |||||
| MO length | 115–121 | 91–105 (98 ± 6; 6) | 87–89 (88 ± 1; 3) | 84–98 (91 ± 5; 3) | 117–156 (132 ± 13; 9) |
| width | 21–24 | 19–26 (23 ± 2; 8) | 20–23 (22 ± 2; 4) | 16–20 (17 ± 2; 3) | 21–34 (27 ± 4; 10) |
| LO length | 88–91 | 77–92 (83 ± 6; 8) | 71–75 (73 ± 2; 4) | 86–99 (95 ± 5; 3) | 109–154 (129 ± 13; 9) |
| width | 24 | 17–25 (19 ± 3; 8) | 16–19 (17 ± 1; 4) | 17–19 (18 ± 1; 3) | 24–30 (27 ± 2; 9) |
| MA length | 97–105 | 74–84 (78 ± 5; 3) | 71–76 (74 ± 4; 2) | 89–96 (93 ± 3; 3) | 108–135 (121 ± 9; 10) |
| width | 20 | 17–22 (19 ± 2; 7) | 18–22 (20 ± 3; 2) | 17–19 (18 ± 1; 3) | 24–33 (27 ± 3; 10) |
| LA length | 70–76 | 66–81 (73 ± 6; 8) | 66–68 (67 ± 1; 3) | 94–100 (98 ± 2; 3) | 109–143 (123 ± 12; 10) |
| width | 18–21 | 15–20 (18 ± 2; 8) | 14–17 (16 ± 2; 4) | 17–19 (18 ± 1; 3) | 20–30 (26 ± 3; 10) |
| MO–LO distance | 51* | 33–43 (39 ± 4; 5) | 37–45 (43 ± 4; 4) | 0 | 0 |
| Lateral spines | |||||
| Length | 71–78 | 62–77 (70 ± 4; 18) | 59–62 (61 ± 2; 2) | 75–85 (82 ± 3; 3) | 98–130 (110 ± 8; 27) |
| Width | 20–29 | 16–21 (18 ± 1.2; 31) | 11–17 (15 ± 1.5; 20) | 13–15 (14 ± 1; 3) | 18–28 (22 ± 2; 58) |
| Dorsal spines | |||||
| Length | 62–75 | – | – | – | – |
| Width | 19–22 | 12–17 (16 ± 1.6; 11) | 12–18 (15 ± 3; 6) | – | 14–27 (21 ± 4; 13) |
*Estimated from published drawing.
Abbreviations: medio-oral (MO); latero-oral (LO); medio-aboral (MA); latero-aboral (LA).
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