Leptocardii |
Not assigned |
Branchiostomatidae
ສະພາບແວດລ້ອມ: ສະພາບແວດລ້ອມ / ເຂດດິນຟ້າອາກາດ / ລະດັບຄວາມເລິກ / ຂອບເຂດການແຈກຢາຍ
ນິເວດວິທະຍາ
Benthic; ລະດັບຄວາມເລິກ 229 - ? m (ເອກະສານອ້າງອີງ 766). Deep-water
Northwest Pacific: Japan.
ຄວາມຍາວໃນການເຕີບໂຕເຕັມຄັ້ງທໍາອິດ / ຂະໜາດ / ນ້ຳໜັກ / ອາຍຸ
ການຈະເລີນເຕັມໄວ: Lm ? range ? - ? cm
Body, 14.7 mm long and up to 1.5 mm high, elongated longitudinally and much flattened laterally, tapering gradually towards both ends; preatrioporal region 10.9 mm, atriopore to anus 1 .0 mm, postanal 1.8mm, and urostyloid process 1.0 mm. Rostral fin extensive and semi-circular, clearly separable from other part by dorsal
and ventral notches. Dorsal fin very low in anterior two-thirds of body, while becoming much higher posterially. Left metapleuron terminated abruptly and markedly just behind atriopore, while the right confluent with well-developed ventral fin, followed by thin and high caudal fin, somewhat higher than dorsal fin. Urostyloid process separable from dorsal and caudal fins by its own lower dorsal and ventral fins. Dorsal fin-chambers 270, relative length to width for posterior tall ones up to 3.3; preanal fin-chambers indiscernible, but instead, an elongated vacuole detected along ventral side of rectum between atriopore and anus. Myotomes 83 in total, consisting of 58 in preatrioporal region, 9 in region from atriopore to anus, and 16 in postanal, thus giving the myotome formula of 58+9+16=83. A black pigment spot detectable in neural tube just anterior to first myotome. Tentacular ring composed of Ca. 30 tentacles (including a few dorsal-most minute ones), its anterior margin situated at level of axial (=proximal) part of 5th myotome; intertentacular membrane extremely higher in span of 6 tentacles next to much shorter midventral tentacle than elsewhere. Mid-gut coecum elongated, ranging at level from 20th to 48th myotomes. No gonad.
ວົງຈອນຊີວິດ ແລະພຶດຕິກໍາການຫາຄູ່
ການຈະເລີນເຕັມໄວ | ການສືບພັນ | ການວາງໄຂ່ | ໄຂ່ | ຄວາມດົກຂອງໄຂ່ປາ | ຕົວອ່ອນ
Members of the class Cephalochordata are gonochoric. Life cycle: Eggs develop into planktotrophic larva and later on to benthic adults.
Nishikawa, T. 2004 A new deep-water lancelet (Cephalochordata) from off Cape Nomamisaki, South West Japan, with a proposal of the revised system recovering the genus Asymmetron. Zoological Science 21:1131-1136. (ເອກະສານອ້າງອີງ 766)
ສະຖານະພາບບັນຊີແດງຂອງ IUCN
(ເອກະສານອ້າງອີງ 130435: Version 2025-2 (Global))
ສະຖານະ CITES (ເອກະສານອ້າງອີງ 108899)
Not Evaluated
CMS (ເອກະສານອ້າງອີງ 116361)
Not Evaluated
ໄພຂົ່ມຂູ່ຕໍ່ມະນຸດ
Harmless
ການນໍາໃຊ້ຂອງມະນຸດ
FAO - Publication: search | FishSource |
ເຄື່ອງມື
ຂໍ້ມູນຕື່ມອີກ
ນິເວດວິທະຍາເຂດຮ້ອນລາຍການອາຫານ (ຜູ້ຖືກລ້າ)
ອົງປະກອບຂອງອາຫານ
ການບໍລິໂພກອາຫານ
ຜູ້ລ້າ
ນະໂຍບາຍດ້ານປະຊາກອນການເຕີບໃຫຍ່
ສູງສຸດ. ອາຍຸ / ຂະຫນາດ
ຄວາມຍາວ-ນ້ໍາຫນັກ rel.
ຄວາມຍາວ - ຄວາມຍາວ rel.
ຄວາມຖີ່ຄວາມຍາວ
ການແປງມະຫາຊົນ
ຄວາມອຸດົມສົມບູນ
ວົງຈອນຊີວິດການສືບພັນການຈະເລີນເຕັມໄວຄວາມດົກຂອງໄຂ່ປາການວາງໄຂ່ໄຂ່ການພັດທະນາໄຂ່ຕົວອ່ອນ ຟີຊິກສາດການບໍລິໂພກອົກຊີເຈນ
ມະນຸດທີ່ກ່ຽວຂ້ອງສະແຕມ, ຫຼຽນ, ອື່ນໆ.
ແຫຼ່ງອີນເຕີເນັດ
ການຄາດຄະເນໂດຍອີງໃສ່ແບບຈໍາລອງ
ຄວາມສ່ຽງຕໍ່ການຫາປາ
(ເອກະສານອ້າງອີງ 71543) |
(0 of 100). |
ປະເພດລາຄາ
(ເອກະສານອ້າງອີງ 80766): |
Unknown. |
