표본정보
| 국가지정·등록표본번호 | |
|---|---|
| 수장기관표본번호 | SNUP 2562 |
| 기타표본번호 | SNUP 2562 |
| 일반명 | 기타 |
| 화석구분 | 체화석(b) |
| 분류일반 | 무척추동물(i) |
| 분류체계 | Animalia (동물) > Echinodermata (극피동물) > Stylophora (스타일로포라) > Cornuta (코뉴타) > Cothurnocystidae (코쑤노시스티대) |
| 학명 | Genus and species indeterminate Form B |
| 모식종 | |
| 담명모식-종류 | |
| 담명모식-표본번호 | |
| 담명모식-수장기관 | |
| 담명모식-참고문헌 | |
| 해당표본모식여부 | 모식아님 |
| 형태적 특징 | Preserved portion of thecal frame consisting of six marginals and a zygal plate. Regularly curved and almost smooth thecal outlines, with slight anterior concavity at the aulacophore insertion. Extremely reduced ornamentation on lower thecal surface, comprising a low, downward-directed ridge along the anterior edge of the theca (M’1, M1, and anterior portion of M2), and a small, triangular, blunt, spinal blade borne by M3. Numerous, small protuberances forming two, possibly three, more-orless regular longitudinal rows on lateral, external flanks of right marginals M2 (posterior portion), Mc, and M3 (anteriorly to spinal blade). M1 subrectangular, large element, with sinuous anterior and posterior edges. M’1 L-shaped, with massive anterior region comparable in morphology and extension to M1, and thinner, apparently relatively short posterior, zygal portion. Articulation facets for A’1 and A1 present on upper surface of M’1 and M1, respectively. Right side of theca consisting of three marginals between M1 and zygal plate, Z: M2, Mc, and M3. M2 regularly arched plate forming right anterior corner of thecal frame. Mc straight to slightly curved marginal forming most of right side of theca. Length of Mc comparable to that of M2. M3 small, curved element forming right posterior corner of theca and bearing reduced spinal blade. No marginal M4 above Z. Upper thecal surface covered by several dozens of small, polygonal supracentral platelets. Low, blunt protuberance on upper (external) surface of each supracentral. Presence of about four relatively large cothurnopores in right anterior corner of upper thecal surface. Each cothurnopore made of two U-shaped plates, with anterior element longer than posterior one. Cothurnopores in central position larger than lateral ones. Proximal portion of aulacophore consisting of eight imbricated rings. Each ring overlapped by its more posterior (proximal) neighbor. Upper surface of rings made of two series of small tectals, missing or possibly collapsed into proximal aulacophore cavity. Lower surface and lateral walls of each proximal ring made of two subequal, symmetrical inferolaterals. Lower surface of inferolaterals flat to slightly convex, with raised anterior edge and more depressed posterior region. Sharp, protruding facet developed on lower abaxial (lateral) corner of each inferolateral, for articulation with a small, spiny element. At least two such spines preserved along right side of proximal aulacophore, articulated to rings 3 and 4. Arm consisting at least of 12 brachials (stylocone and 11 more distal ossicles) and two series of open, partly collapsed cover plates. Brachials rapidly decreasing in size distally. Low longitudinal median crest on lower surface of brachials. Upper surface of brachials poorly preserved, showing longitudinal median furrow. Proximal notch visible on internal surface of stylocone. Stylocone funnel-shaped, long, and narrow (length approximately 0.8 mm). Two pairs of cover plates articulated to stylocone, and one pair to each ossicle. Fan-shaped cover plates, with massive, narrow lower extremity, and thinner, wider, curved upper edge. Ornamentation consisting of radiating lines on external surface of cover plates. |
| 지질시대 | 고생대(캠브리아기) |
| 분지 | 태백산분지 |
| 지층명 | 조선누층군, 태백층군, 동점층 |
| 암상 | 세립 사암 |
| 산지 | 경상북도 봉화군 석포면 석포리 산 1-189(석개재 임도) 37°04’19”N129°08’39”E [카카오맵] |
| 크기 | |
| 암석표본내 보존상황 | |
| 종의 수 | |
| 보존양상 | 외형본(Em) |
| 보존된 부분 | aulacophore and partial theca |
| 카운터파트 유무 | 있음 |
| 수장기관정보 | 지질박물관 |
| 표본취득방법 | 기증(Donated) |
| 채집자/기증자 | |
| 취득일 | None |
| 참고문헌1 | Lee, S-B., Lefebvre, B,m and Choi, D.K. (2005) Latest Cambrian cornutes (Echinodermata: Stylophora) from the Taebaeksan Basin, Korea. Journal of Paleontology, 79, 139-151 |
| 참고문헌2 | |
| 참고문헌3 | |
| 임시등급평가 | 5 |
| 최종등급평가 | 나(국가등록필요) |
| 유산 가치 | 태백산분지의 후기 캄브리아기 극피동물의 다양성의 증거이다. |
| 비고-화석표본 | |
| 비고-암석표본 | |
| 비고-행정처리 | |
| 작업자 | 이승배 |
| 작업일 | 2021년 9월 27일 |
| 검토의견 | |
| 검토자 | |
| 검토일 |
| 구분 | 화석표본 전체사진 |
|---|---|
| 제목 | SNUP 2562-01 |
| 설명 | |
| 사진 |  |
| 구분 | 화석표본 확대사진 |
| 제목 | SNUP 2562-02 |
| 설명 | SEM 사진 |
| 사진 |  |