Hapalemur griseus (Lemuridae)
Hapalemur griseus ist eine Primatenart innerhalb der Familie Lemuridae, die ab dem Holozän lebte, das vor rund vor 12.000 Jahren begann und bis vor heute andauerte.
Fundorte
Die Funddaten, die Systematik sowie die unten folgende Literatursammlung stammen aus der Paleobiology Database, Lizenz
Daten zu den einzelnen Funden von Hapalemur griseus
| Sammlung | Kommentar zum Fundort | Epoche, Alter | Kommentar zur Sammlung | |
|---|---|---|---|---|
| Anjohingidrobe Cave | AGB has a single opening, facing northeast, about 5 m wide and varying from 1 to 3 m high, at 17°54.35′S, 44°29.40′E (WGS 84) and 218 m above sea level. Directly above the opening on the outside, there is a large rock ledge, 9.4 m above the top of the cave opening and greater than 1 m2 in area. Immediately inside the cave opening (Fig. 2), the floor drops 3.8 m; large boulders form pockets inside at succeeding depths toward the back of the main chamber, where the ceiling is generally 6 to 9 m high and stalactites extend ca. 1 m from the ceiling. Rock shelves and scree slopes typify the east wall, and two small chambers end in soft clay sediment deposits. On the west wall, the boulder slope continues into the deepest point of the cave, 7 m below the entrance. A narrow passage at the rear (south) end of the cave continues upward to end at a small hole in the floor lacking sediment. On the outside, 3 m east of the entrance, a small indentation in the rock forms a dead-end passage containing clay sediments, and similar material continues back along the cave wall westward to the cave entrance. | Holocene zwischen 0 und 0.01 Millionen Jahren |
Giant Lemur Cave, AGB | |
| Kommentar z. Stratigraphie | ||||
| Because the cave is predominantly vertical, with no large areas of horizontal or near-horizontal floor, it was necessary to distinguish bone accumulations in and near the cave by separate sublocation numbers, rather than a grid reference. These are noted in Figure 2, and Table 1 summarizes the characteristics of each sublocation. ABG-1 is the sediment layer immediately east of the cave entrance. Where this rock wall enfolds to produce a small alcove, surface material and sediments were sublocated as AGB-1A. Proceeding into the main cave, a small ledge on the east wall inside is covered with a slope of fine debris (ABG-2). Directly below on the cave floor, a dead-end chamber descends farther under the east wall and is partially filled with soft clay sediment (AGB-3). Returning to the entrance, small pockets of bone-rich debris and sediment have accumulated at the base of the 3.8 m entrance drop, in a series of steps downward (AGB-4, AGB-5, and AGB-6). Immediately below AGB-5 and AGB-6 on the southward slope going back into the cave is a larger area of uneven topography, composed of large stones interspersed with bone-rich debris and sediment. This is the very productive sublocation AGB-7. Beneath the uneven floor of the cave near the entrance, there is a small chamber containing sediments with bones (AGB-8). On the opposite (west) wall of the cave, the cave floor descends to its lowest depth below the entrance at −7 m. There is a lag concentrate of darkly stained bones and fine limestone chips in this deepest pocket, in places lightly cemented into a breccia (AGB-9). Note: The authors do not distinguish the various specimens per sublocation, so they are all included in the same collection PBDB entry | ||||
| U.a. am Fundort ausgegraben: | Archaeolemur edwardsi | |||
| Sammlung | Kommentar zum Fundort | Epoche, Alter | Kommentar zur Sammlung | |
|---|---|---|---|---|
| Anjohimaletsy Cave | In subsequent years, AGB and a smaller fissure cave nearby (AMT) were inspected by several collaborating scientists, and plans were made, including procurement of the necessary permits, to mount an expedition primarily for the purpose of making surface bone collections, excavating test pits, and mapping the cave deposits. AMT, at 17°54.35′S, 44°29.41′E, is a small fissure cave, or slot cave, about 80 m east of AGB, at approximately the same elevation. The entire floor comprises only about 1 m2 of sediment. At the back of the small cave is a narrow solution pit that descends another ca. 5 m. | Holocene zwischen 0 und 0.01 Millionen Jahren |
Narrow Cave, AMT | |
| Lithographie | ||||
| At AMT, surface bones were collected and loose breccia was excavated to 50 cm depth from the narrow floor (with some careful use of metal tools to dislodge crusts). This material was disaggregated and sifted. | ||||
| U.a. am Fundort ausgegraben: | Archaeolemur edwardsi | |||