# Assembly name: bStePaa1.hap1.1 # Organism name: Sterna paradisaea (arctic tern) # Taxid: 279953 # BioSample: SAMEA120960987 # BioProject: PRJEB122750 # Submitter: WELLCOME SANGER INSTITUTE # Date: 2026-09-08 # Assembly type: haploid (haplotype 1) # Release type: major # Assembly level: Chromosome # Genome representation: full # WGS project: CFWXWZ01 # Assembly method: various # Genome coverage: 82x # Sequencing technology: Oxford Nanopore,Arima2 # RefSeq category: Reference Genome # GenBank assembly accession: GCA_987197735.1 # Linked assembly: GCA_987197725.1 (haplotype 2) # ## Assembly-Unit names: ## Primary Assembly ## non-nuclear # # Ordered by chromosome/plasmid; the chromosomes/plasmids are followed by # unlocalized scaffolds. # Unplaced scaffolds are listed at the end. # RefSeq is equal or derived from GenBank object. # # Sequence-Name Sequence-Role Assigned-Molecule Assigned-Molecule-Location/Type GenBank-Accn Relationship RefSeq-Accn Assembly-Unit Sequence-Length UCSC-style-name SUPER_1_HAP1 assembled-molecule 1 Chromosome OZ500764.1 <> na Primary Assembly 221493598 na SUPER_2_HAP1 assembled-molecule 2 Chromosome OZ500765.1 <> na Primary Assembly 175084664 na SUPER_3_HAP1 assembled-molecule 3 Chromosome OZ500766.1 <> na Primary Assembly 134076933 na SUPER_4_HAP1 assembled-molecule 4 Chromosome OZ500767.1 <> na Primary Assembly 86918496 na SUPER_5_HAP1 assembled-molecule 5 Chromosome OZ500768.1 <> na Primary Assembly 85439499 na SUPER_6_HAP1 assembled-molecule 6 Chromosome OZ500769.1 <> na Primary Assembly 72899618 na SUPER_7_HAP1 assembled-molecule 7 Chromosome OZ500770.1 <> na Primary Assembly 68231934 na SUPER_8_HAP1 assembled-molecule 8 Chromosome OZ500771.1 <> na Primary Assembly 50090563 na SUPER_9_HAP1 assembled-molecule 9 Chromosome OZ500772.1 <> na Primary Assembly 49058736 na SUPER_10_HAP1 assembled-molecule 10 Chromosome OZ500773.1 <> na Primary Assembly 47545233 na SUPER_11_HAP1 assembled-molecule 11 Chromosome OZ500774.1 <> na Primary Assembly 39298995 na SUPER_12_HAP1 assembled-molecule 12 Chromosome OZ500775.1 <> na Primary Assembly 18678064 na SUPER_13_HAP1 assembled-molecule 13 Chromosome OZ500776.1 <> na Primary Assembly 15033475 na SUPER_14_HAP1 assembled-molecule 14 Chromosome OZ500777.1 <> na Primary Assembly 14600187 na SUPER_15_HAP1 assembled-molecule 15 Chromosome OZ500778.1 <> na Primary Assembly 14414558 na SUPER_16_HAP1 assembled-molecule 16 Chromosome OZ500779.1 <> na Primary Assembly 13999361 na SUPER_17_HAP1 assembled-molecule 17 Chromosome OZ500780.1 <> na Primary Assembly 13325826 na SUPER_18_HAP1 assembled-molecule 18 Chromosome OZ500781.1 <> na Primary Assembly 12396861 na SUPER_19_HAP1 assembled-molecule 19 Chromosome OZ500782.1 <> na Primary Assembly 11835532 na SUPER_20_HAP1 assembled-molecule 20 Chromosome OZ500783.1 <> na Primary Assembly 11228244 na SUPER_21_HAP1 assembled-molecule 21 Chromosome OZ500784.1 <> na Primary Assembly 10976891 na SUPER_22_HAP1 assembled-molecule 22 Chromosome OZ500785.1 <> na Primary Assembly 9053758 na SUPER_23_HAP1 assembled-molecule 23 Chromosome OZ500786.1 <> na Primary Assembly 8665926 na SUPER_24_HAP1 assembled-molecule 24 Chromosome OZ500787.1 <> na Primary Assembly 8433913 na SUPER_25_HAP1 assembled-molecule 25 Chromosome OZ500788.1 <> na Primary Assembly 8338911 na SUPER_26_HAP1 assembled-molecule 26 Chromosome OZ500789.1 <> na Primary Assembly 8029696 na SUPER_27_HAP1 assembled-molecule 27 Chromosome OZ500790.1 <> na Primary Assembly 8025443 na SUPER_28_HAP1 assembled-molecule 28 Chromosome OZ500791.1 <> na Primary Assembly 7973613 na SUPER_29_HAP1 assembled-molecule 29 Chromosome OZ500792.1 <> na Primary Assembly 7534481 na SUPER_30_HAP1 assembled-molecule 30 Chromosome OZ500793.1 <> na Primary Assembly 7466327 na SUPER_31_HAP1 assembled-molecule 31 Chromosome OZ500794.1 <> na Primary Assembly 7021218 na SUPER_32_HAP1 assembled-molecule 32 Chromosome OZ500795.1 <> na Primary Assembly 6686275 na SUPER_33_HAP1 assembled-molecule 33 Chromosome OZ500796.1 <> na Primary Assembly 5377254 na SUPER_Z_HAP1 assembled-molecule Z Chromosome OZ500797.1 <> na Primary Assembly 86783612 na HAP1_SCAFFOLD_40 unplaced-scaffold na na CFWXWZ010000001.1 <> na Primary Assembly 1442018 na HAP1_SCAFFOLD_41 unplaced-scaffold na na CFWXWZ010000002.1 <> na Primary Assembly 1362717 na HAP1_SCAFFOLD_43 unplaced-scaffold na na CFWXWZ010000003.1 <> na Primary Assembly 1326100 na HAP1_SCAFFOLD_44 unplaced-scaffold na na CFWXWZ010000004.1 <> na Primary Assembly 1282283 na HAP1_SCAFFOLD_45 unplaced-scaffold na na CFWXWZ010000005.1 <> na Primary Assembly 1281417 na HAP1_SCAFFOLD_46 unplaced-scaffold na na CFWXWZ010000006.1 <> na Primary Assembly 1266291 na HAP1_SCAFFOLD_48 unplaced-scaffold na na CFWXWZ010000007.1 <> na Primary Assembly 1147964 na HAP1_SCAFFOLD_50 unplaced-scaffold na na CFWXWZ010000008.1 <> na Primary Assembly 1075348 na HAP1_SCAFFOLD_51 unplaced-scaffold na na CFWXWZ010000009.1 <> na Primary Assembly 1009084 na HAP1_SCAFFOLD_52 unplaced-scaffold na na CFWXWZ010000010.1 <> na Primary Assembly 1004677 na HAP1_SCAFFOLD_53 unplaced-scaffold na na CFWXWZ010000011.1 <> na Primary Assembly 946321 na HAP1_SCAFFOLD_54 unplaced-scaffold na na CFWXWZ010000012.1 <> na Primary Assembly 944435 na HAP1_SCAFFOLD_55 unplaced-scaffold na na CFWXWZ010000013.1 <> na Primary Assembly 920971 na HAP1_SCAFFOLD_56 unplaced-scaffold na na CFWXWZ010000014.1 <> na Primary Assembly 917548 na HAP1_SCAFFOLD_57 unplaced-scaffold na na CFWXWZ010000015.1 <> na Primary Assembly 867825 na HAP1_SCAFFOLD_58 unplaced-scaffold na na CFWXWZ010000016.1 <> na Primary Assembly 837510 na HAP1_SCAFFOLD_59 unplaced-scaffold na na CFWXWZ010000017.1 <> na Primary Assembly 814245 na HAP1_SCAFFOLD_60 unplaced-scaffold na na CFWXWZ010000018.1 <> na Primary Assembly 772597 na HAP1_SCAFFOLD_63 unplaced-scaffold na na CFWXWZ010000019.1 <> na Primary Assembly 751996 na HAP1_SCAFFOLD_64 unplaced-scaffold na na CFWXWZ010000020.1 <> na Primary Assembly 731308 na HAP1_SCAFFOLD_65 unplaced-scaffold na na CFWXWZ010000021.1 <> na Primary Assembly 716384 na HAP1_SCAFFOLD_66 unplaced-scaffold na na CFWXWZ010000022.1 <> na Primary Assembly 701196 na HAP1_SCAFFOLD_67 unplaced-scaffold na na CFWXWZ010000023.1 <> na Primary Assembly 682945 na HAP1_SCAFFOLD_68 unplaced-scaffold na na CFWXWZ010000024.1 <> na Primary Assembly 670537 na HAP1_SCAFFOLD_69 unplaced-scaffold na na CFWXWZ010000025.1 <> na Primary Assembly 650327 na HAP1_SCAFFOLD_70 unplaced-scaffold na na CFWXWZ010000026.1 <> na Primary Assembly 642496 na HAP1_SCAFFOLD_71 unplaced-scaffold na na CFWXWZ010000027.1 <> na Primary Assembly 635107 na HAP1_SCAFFOLD_72 unplaced-scaffold na na CFWXWZ010000028.1 <> na Primary Assembly 617513 na HAP1_SCAFFOLD_74 unplaced-scaffold na na CFWXWZ010000029.1 <> na Primary Assembly 608981 na HAP1_SCAFFOLD_75 unplaced-scaffold na na CFWXWZ010000030.1 <> na Primary Assembly 599205 na HAP1_SCAFFOLD_76 unplaced-scaffold na na CFWXWZ010000031.1 <> na Primary Assembly 591064 na HAP1_SCAFFOLD_77 unplaced-scaffold na na CFWXWZ010000032.1 <> na Primary Assembly 583036 na HAP1_SCAFFOLD_78 unplaced-scaffold na na CFWXWZ010000033.1 <> na Primary Assembly 572261 na HAP1_SCAFFOLD_80 unplaced-scaffold na na CFWXWZ010000034.1 <> na Primary Assembly 540073 na HAP1_SCAFFOLD_81 unplaced-scaffold na na CFWXWZ010000035.1 <> na Primary Assembly 534927 na HAP1_SCAFFOLD_82 unplaced-scaffold na na CFWXWZ010000036.1 <> na Primary Assembly 518087 na HAP1_SCAFFOLD_83 unplaced-scaffold na na CFWXWZ010000037.1 <> na Primary Assembly 517312 na HAP1_SCAFFOLD_84 unplaced-scaffold na na CFWXWZ010000038.1 <> na Primary Assembly 502825 na HAP1_SCAFFOLD_85 unplaced-scaffold na na CFWXWZ010000039.1 <> na Primary Assembly 497989 na HAP1_SCAFFOLD_86 unplaced-scaffold na na CFWXWZ010000040.1 <> na Primary Assembly 483027 na HAP1_SCAFFOLD_87 unplaced-scaffold na na CFWXWZ010000041.1 <> na Primary Assembly 471252 na HAP1_SCAFFOLD_89 unplaced-scaffold na na CFWXWZ010000042.1 <> na Primary Assembly 451948 na HAP1_SCAFFOLD_90 unplaced-scaffold na na CFWXWZ010000043.1 <> na Primary Assembly 443176 na HAP1_SCAFFOLD_91 unplaced-scaffold na na CFWXWZ010000044.1 <> na Primary Assembly 432723 na HAP1_SCAFFOLD_92 unplaced-scaffold na na CFWXWZ010000045.1 <> na Primary Assembly 428620 na HAP1_SCAFFOLD_93 unplaced-scaffold na na CFWXWZ010000046.1 <> na Primary Assembly 428334 na HAP1_SCAFFOLD_94 unplaced-scaffold na na CFWXWZ010000047.1 <> na Primary Assembly 418604 na HAP1_SCAFFOLD_95 unplaced-scaffold na na CFWXWZ010000048.1 <> na Primary Assembly 414391 na HAP1_SCAFFOLD_96 unplaced-scaffold na na CFWXWZ010000049.1 <> na Primary Assembly 399563 na HAP1_SCAFFOLD_97 unplaced-scaffold na na CFWXWZ010000050.1 <> na Primary Assembly 397494 na HAP1_SCAFFOLD_98 unplaced-scaffold na na CFWXWZ010000051.1 <> na Primary Assembly 382355 na HAP1_SCAFFOLD_99 unplaced-scaffold na na CFWXWZ010000052.1 <> na Primary Assembly 378177 na HAP1_SCAFFOLD_100 unplaced-scaffold na na CFWXWZ010000053.1 <> na Primary Assembly 370399 na HAP1_SCAFFOLD_101 unplaced-scaffold na na CFWXWZ010000054.1 <> na Primary Assembly 357669 na HAP1_SCAFFOLD_102 unplaced-scaffold na na CFWXWZ010000055.1 <> na Primary Assembly 342646 na HAP1_SCAFFOLD_103 unplaced-scaffold na na CFWXWZ010000056.1 <> na Primary Assembly 331100 na HAP1_SCAFFOLD_104 unplaced-scaffold na na CFWXWZ010000057.1 <> na Primary Assembly 330933 na HAP1_SCAFFOLD_105 unplaced-scaffold na na CFWXWZ010000058.1 <> na Primary Assembly 327392 na HAP1_SCAFFOLD_106 unplaced-scaffold na na CFWXWZ010000059.1 <> na Primary Assembly 320964 na HAP1_SCAFFOLD_107 unplaced-scaffold na na CFWXWZ010000060.1 <> na Primary Assembly 319245 na HAP1_SCAFFOLD_108 unplaced-scaffold na na CFWXWZ010000061.1 <> na Primary Assembly 313106 na HAP1_SCAFFOLD_109 unplaced-scaffold na na CFWXWZ010000062.1 <> na Primary Assembly 307633 na HAP1_SCAFFOLD_110 unplaced-scaffold na na CFWXWZ010000063.1 <> na Primary Assembly 306643 na HAP1_SCAFFOLD_111 unplaced-scaffold na na CFWXWZ010000064.1 <> na Primary Assembly 287859 na HAP1_SCAFFOLD_112 unplaced-scaffold na na CFWXWZ010000065.1 <> na Primary Assembly 284786 na HAP1_SCAFFOLD_113 unplaced-scaffold na na CFWXWZ010000066.1 <> na Primary Assembly 279856 na HAP1_SCAFFOLD_114 unplaced-scaffold na na CFWXWZ010000067.1 <> na Primary Assembly 277071 na HAP1_SCAFFOLD_115 unplaced-scaffold na na CFWXWZ010000068.1 <> na Primary Assembly 272557 na HAP1_SCAFFOLD_116 unplaced-scaffold na na CFWXWZ010000069.1 <> na Primary Assembly 269517 na HAP1_SCAFFOLD_117 unplaced-scaffold na na CFWXWZ010000070.1 <> na Primary Assembly 266581 na HAP1_SCAFFOLD_118 unplaced-scaffold na na CFWXWZ010000071.1 <> na Primary Assembly 261258 na HAP1_SCAFFOLD_119 unplaced-scaffold na na CFWXWZ010000072.1 <> na Primary Assembly 261009 na HAP1_SCAFFOLD_120 unplaced-scaffold na na CFWXWZ010000073.1 <> na Primary Assembly 259642 na HAP1_SCAFFOLD_121 unplaced-scaffold na na CFWXWZ010000074.1 <> na Primary Assembly 258524 na HAP1_SCAFFOLD_122 unplaced-scaffold na na CFWXWZ010000075.1 <> na Primary Assembly 254958 na HAP1_SCAFFOLD_123 unplaced-scaffold na na CFWXWZ010000076.1 <> na Primary Assembly 254314 na HAP1_SCAFFOLD_124 unplaced-scaffold na na CFWXWZ010000077.1 <> na Primary Assembly 250633 na HAP1_SCAFFOLD_126 unplaced-scaffold na na CFWXWZ010000078.1 <> na Primary Assembly 249972 na HAP1_SCAFFOLD_127 unplaced-scaffold na na CFWXWZ010000079.1 <> na Primary Assembly 244038 na HAP1_SCAFFOLD_128 unplaced-scaffold na na CFWXWZ010000080.1 <> na Primary Assembly 235317 na HAP1_SCAFFOLD_129 unplaced-scaffold na na CFWXWZ010000081.1 <> na Primary Assembly 227763 na HAP1_SCAFFOLD_131 unplaced-scaffold na na CFWXWZ010000082.1 <> na Primary Assembly 201474 na HAP1_SCAFFOLD_132 unplaced-scaffold na na CFWXWZ010000083.1 <> na Primary Assembly 187753 na HAP1_SCAFFOLD_134 unplaced-scaffold na na CFWXWZ010000084.1 <> na Primary Assembly 184117 na HAP1_SCAFFOLD_135 unplaced-scaffold na na CFWXWZ010000085.1 <> na Primary Assembly 180182 na HAP1_SCAFFOLD_136 unplaced-scaffold na na CFWXWZ010000086.1 <> na Primary Assembly 178016 na HAP1_SCAFFOLD_137 unplaced-scaffold na na CFWXWZ010000087.1 <> na Primary Assembly 175540 na HAP1_SCAFFOLD_138 unplaced-scaffold na na CFWXWZ010000088.1 <> na Primary Assembly 174006 na HAP1_SCAFFOLD_139 unplaced-scaffold na na CFWXWZ010000089.1 <> na Primary Assembly 164808 na HAP1_SCAFFOLD_140 unplaced-scaffold na na CFWXWZ010000090.1 <> na Primary Assembly 161177 na HAP1_SCAFFOLD_141 unplaced-scaffold na na CFWXWZ010000091.1 <> na Primary Assembly 156448 na HAP1_SCAFFOLD_143 unplaced-scaffold na na CFWXWZ010000092.1 <> na Primary Assembly 143122 na HAP1_SCAFFOLD_144 unplaced-scaffold na na CFWXWZ010000093.1 <> na Primary Assembly 131209 na HAP1_SCAFFOLD_145 unplaced-scaffold na na CFWXWZ010000094.1 <> na Primary Assembly 126094 na HAP1_SCAFFOLD_146 unplaced-scaffold na na CFWXWZ010000095.1 <> na Primary Assembly 123157 na HAP1_SCAFFOLD_147 unplaced-scaffold na na CFWXWZ010000096.1 <> na Primary Assembly 118362 na HAP1_SCAFFOLD_148 unplaced-scaffold na na CFWXWZ010000097.1 <> na Primary Assembly 111245 na HAP1_SCAFFOLD_149 unplaced-scaffold na na CFWXWZ010000098.1 <> na Primary Assembly 107466 na HAP1_SCAFFOLD_150 unplaced-scaffold na na CFWXWZ010000099.1 <> na Primary Assembly 102313 na HAP1_SCAFFOLD_151 unplaced-scaffold na na CFWXWZ010000100.1 <> na Primary Assembly 99073 na HAP1_SCAFFOLD_152 unplaced-scaffold na na CFWXWZ010000101.1 <> na Primary Assembly 98062 na HAP1_SCAFFOLD_153 unplaced-scaffold na na CFWXWZ010000102.1 <> na Primary Assembly 95099 na HAP1_SCAFFOLD_154 unplaced-scaffold na na CFWXWZ010000103.1 <> na Primary Assembly 92153 na HAP1_SCAFFOLD_155 unplaced-scaffold na na CFWXWZ010000104.1 <> na Primary Assembly 90841 na HAP1_SCAFFOLD_156 unplaced-scaffold na na CFWXWZ010000105.1 <> na Primary Assembly 90032 na HAP1_SCAFFOLD_157 unplaced-scaffold na na CFWXWZ010000106.1 <> na Primary Assembly 86140 na HAP1_SCAFFOLD_158 unplaced-scaffold na na CFWXWZ010000107.1 <> na Primary Assembly 84239 na HAP1_SCAFFOLD_159 unplaced-scaffold na na CFWXWZ010000108.1 <> na Primary Assembly 81524 na HAP1_SCAFFOLD_160 unplaced-scaffold na na CFWXWZ010000109.1 <> na Primary Assembly 80955 na HAP1_SCAFFOLD_161 unplaced-scaffold na na CFWXWZ010000110.1 <> na Primary Assembly 79334 na HAP1_SCAFFOLD_162 unplaced-scaffold na na CFWXWZ010000111.1 <> na Primary Assembly 70585 na HAP1_SCAFFOLD_163 unplaced-scaffold na na CFWXWZ010000112.1 <> na Primary Assembly 69679 na HAP1_SCAFFOLD_164 unplaced-scaffold na na CFWXWZ010000113.1 <> na Primary Assembly 69261 na HAP1_SCAFFOLD_165 unplaced-scaffold na na CFWXWZ010000114.1 <> na Primary Assembly 59484 na HAP1_SCAFFOLD_166 unplaced-scaffold na na CFWXWZ010000115.1 <> na Primary Assembly 56685 na HAP1_SCAFFOLD_167 unplaced-scaffold na na CFWXWZ010000116.1 <> na Primary Assembly 50203 na HAP1_SCAFFOLD_168 unplaced-scaffold na na CFWXWZ010000117.1 <> na Primary Assembly 42275 na HAP1_SCAFFOLD_169 unplaced-scaffold na na CFWXWZ010000118.1 <> na Primary Assembly 39004 na HAP1_SCAFFOLD_170 unplaced-scaffold na na CFWXWZ010000119.1 <> na Primary Assembly 38779 na HAP1_SCAFFOLD_171 unplaced-scaffold na na CFWXWZ010000120.1 <> na Primary Assembly 38104 na HAP1_SCAFFOLD_172 unplaced-scaffold na na CFWXWZ010000121.1 <> na Primary Assembly 32153 na HAP1_SCAFFOLD_173 unplaced-scaffold na na CFWXWZ010000122.1 <> na Primary Assembly 27232 na HAP1_SCAFFOLD_174 unplaced-scaffold na na CFWXWZ010000123.1 <> na Primary Assembly 26338 na HAP1_SCAFFOLD_175 unplaced-scaffold na na CFWXWZ010000124.1 <> na Primary Assembly 24535 na HAP1_SCAFFOLD_176 unplaced-scaffold na na CFWXWZ010000125.1 <> na Primary Assembly 19223 na HAP1_SCAFFOLD_177 unplaced-scaffold na na CFWXWZ010000126.1 <> na Primary Assembly 17545 na HAP1_SCAFFOLD_178 unplaced-scaffold na na CFWXWZ010000127.1 <> na Primary Assembly 16002 na HAP1_SCAFFOLD_179 unplaced-scaffold na na CFWXWZ010000128.1 <> na Primary Assembly 13586 na HAP1_SCAFFOLD_180 unplaced-scaffold na na CFWXWZ010000129.1 <> na Primary Assembly 10379 na HAP1_SCAFFOLD_181 unplaced-scaffold na na CFWXWZ010000130.1 <> na Primary Assembly 8854 na HAP1_SCAFFOLD_182 unplaced-scaffold na na CFWXWZ010000131.1 <> na Primary Assembly 4635 na HAP1_SCAFFOLD_183 unplaced-scaffold na na CFWXWZ010000132.1 <> na Primary Assembly 2623 na HAP1_SCAFFOLD_184 unplaced-scaffold na na CFWXWZ010000133.1 <> na Primary Assembly 1694 na HAP1_SCAFFOLD_185 unplaced-scaffold na na CFWXWZ010000134.1 <> na Primary Assembly 1322 na scaffold_MT_1 assembled-molecule MT Mitochondrion OZ500798.1 <> na non-nuclear 19142 na