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Cucullaea (Idonearca) melhaseana
Taxonomy
Cucullaea (Idonearca) melhaseana was named by Anderson (1958). It is a 3D body fossil. Its type locality is CAS loc. 27833, Dry Creek, which is in a Turonian marine horizon in the Redding Formation of California.
Sister species lacking formal opinion data
Arca gabrielis, C. acuticarinata, C. aequata, C. amaxensis, C. andersoni, C. antroea, C. antrosa, C. arctica, C. ardassiensis, C. argentina, C. australis, C. beringensis, C. blanpiedi, C. cancellata, C. capex, C. ceres, C. clathrata, C. compressirostra, C. concamera, C. contracta, C. cornueliana, C. cornuetiana, C. crassatesta, C. deatvillensis, C. decussata, C. depressa, C. dewalquei, C. donaldi, C. egertonianus, C. farrei, C. favrei, C. fibrosa, C. fittoni, C. gabrielis, C. grahamensis, C. gresslyi, C. herculea, C. inaequivalvis, C. irritans, C. jaworskii, C. kaufmanensis, C. kingsensis, C. kipandeensis, C. kraussi, C. leopoliensis, C. macrodonta, C. mailleana, C. martini, C. matheroniana, C. mendozana, C. minchiahamplonensis, C. montensis, C. munsteri, C. murrayi, C. nana, C. neglecta, C. obliquata, C. oblonga, C. orientalis, C. ornata, C. pectunculina, C. powersi, C. praelonga, C. raea, C. recedens, C. reesideana, C. reticulata, C. rocana, C. roederi, C. rothi, C. royana, C. royei, C. saffordi, C. sheikhfadli, C. similis, C. singularia, C. texana, C. texta, C. thevestenis, C. transversa, C. volgensis, C. wadei, C. waihaoensis, C. woodsi, C. jaworskii, C. coxi, C. leopoliensis, C. royeri, C. fuegunensis, C. aalensis, C. acuticarinata, C. amaxensis, C. deatvillensis, C. delicatostriata, C. ezoensis, C. ezoensis, C. fujii, C. gratiota, C. mabuchii, C. matheroniana, C. oblonga, C. powersi, C. rothi, C. texta, C. wagadensis, C. hamptoni, C. waihaoensis, C. plana, C. austriaca, C. crassitesta, C. szaboi, Idonearca aequilateralis, Idonearca contracta, Idonearca depressa, Idonearca glabra, Idonearca haguei, Idonearca mailleana, Idonearca matheroni, Idonearca minchinhamptonensis, Idonearca rockymontana, Idonearca truncata
Synonymy list
| Year | Name and author |
|---|---|
| 1958 | Cucullaea (Idonearca) melhaseana Anderson p. 90 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Cucullaea (Idonearca) melhaseana Anderson 1958
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. M. Anderson 1958 | Test thick, outline of valves subtrigonal, umbones rounded, low, extended posteriorly, with short winglike extensions before and behind, as seen from the side ; beaks a little in ad vance of central, incurved above the ligamental area, not closely approximate; shell slightly flattened on the sides ; basal margin broadly rounded or nearly straight ; surface of shell al most smooth, marked by concentric lines of growth and by faint radial lines on anterior part of shell. Hinge line long, with numerous short vertical teeth in central third of hinge, and long lateral teeth, 2 or more at each end ; ligamental area marked by 6-8 chevronlike grooves, sloping outwardly to hinge line. This species in some respects resembles Cucullaea truncata Gabb, and appears to belong in its group, but it has broader and more rounded umbones, a longer hinge line, more numerous central, vertical teeth, and less conspicuous radial lines, which are confined to the anterior part of the shell. |
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order | |||||
| Reference: Aberhan et al. 2004 | |||||
Age range: Turonian or 93.90000 to 89.80000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Turonian | USA (California) | Cucullaea melhaseana (215288) | |
| Turonian | USA (California) | Cucullaea melhaseana (type locality: 215338 220360 220367) |