Trionyx triunguis

African softshell turtle

Maximum lifespan

50.6 yr

AnAge record

mtDNA size

16,590 bp

RefSeq NC_012833.1

GC content

41.52%

Whole genome

Non-coding

1,149 bp

D-loop 1,078 bp

Where African softshell turtle sits among 2,335 species

Whole-genome GC content against maximum lifespan. African softshell turtle has the 132nd longest lifespan of them.

This species
Other reptiles
Other classes

Plot other mtDNA features with this species highlighted

Base composition

Whole genome16,590 bp

GC skew (G − C) / (G + C): −0.412
AT skew (A − T) / (A + T): +0.208

Life history

Maximum lifespan: 50.6 years
Adult weight: 10.8 kg

Lifespan from AnAge · AnAge record · other traits from AnAge Build 15 (HAGRID 03791)

About this record

Lifespan source: AnAge build 15
Based on: an animal in captivity
Data quality: acceptable, small sample
Licence: Free to use, subject to the Human Ageing Genomic Resources conditions of use
Status: Updated in build 2
In the database since: build 1 (2015-07-01)
Last changed: build 2 (2026-11-13)

Every change against the 2015 build is in the changelog download.

Composition by region

Reference (L) strand as deposited in RefSeq

Whole genome16,590 bp

Protein-coding11,318 bp

12S rRNA977 bp

16S rRNA1,608 bp

All tRNA1,538 bp

D-loop1,078 bp

Genes and regions

Select a column to sort; select a gene to compare it across species

Base composition of Trionyx triunguis genes

ND1NADH dehydrogenase subunit 1	972 bp	31.8%	24.7%	10.9%	32.6%	43.52%	−0.499	+0.126
ND2NADH dehydrogenase subunit 2	1,039 bp	38.0%	22.6%	8.3%	31.1%	39.37%	−0.579	+0.254
COX1Cytochrome c oxidase subunit I	1,539 bp	29.4%	27.2%	16.0%	27.4%	43.47%	−0.262	+0.039
COX2Cytochrome c oxidase subunit II	687 bp	36.1%	22.3%	12.8%	28.8%	41.63%	−0.385	+0.237
ATP8ATP synthase F0 subunit 8	165 bp	41.8%	22.4%	4.2%	31.5%	35.76%	−0.763	+0.302
ATP6ATP synthase F0 subunit 6	684 bp	35.1%	21.9%	8.3%	34.6%	42.98%	−0.612	+0.231
COX3Cytochrome c oxidase subunit III	784 bp	29.5%	23.9%	16.1%	30.6%	46.68%	−0.311	+0.105
ND3NADH dehydrogenase subunit 3	349 bp	33.5%	24.6%	10.6%	31.2%	41.83%	−0.493	+0.153
ND4LNADH dehydrogenase subunit 4L	297 bp	31.6%	24.2%	9.4%	34.7%	44.11%	−0.573	+0.133
ND4NADH dehydrogenase subunit 4	1,381 bp	35.6%	21.1%	9.8%	33.5%	43.30%	−0.548	+0.254
ND5NADH dehydrogenase subunit 5	1,779 bp	35.3%	22.8%	10.1%	31.8%	41.88%	−0.517	+0.215
ND6NADH dehydrogenase subunit 6	525 bp	49.0%	9.9%	6.1%	35.0%	41.14%	−0.704	+0.663
CYTBCytochrome b	1,140 bp	32.5%	23.3%	12.2%	32.0%	44.21%	−0.448	+0.164
12S rRNA12S ribosomal RNA	977 bp	37.4%	20.2%	16.5%	26.0%	42.48%	−0.224	+0.299
16S rRNA16S ribosomal RNA	1,608 bp	40.4%	19.5%	15.8%	24.3%	40.11%	−0.212	+0.348
D-loopControl region (D-loop)	1,078 bp	35.8%	31.3%	9.2%	23.7%	32.93%	−0.442	+0.068

Codon usage

Counts per codon, darker is more frequent

Gene

3,779 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).

Phe F5.5%

UUU60

UUC147

Leu L16.1%

UUA80

UUG24

CUU40

CUC76

CUA349

CUG39

Ile I8.0%

AUU86

AUC218

Met M6.2%

AUA200

AUG33

Val V4.2%

GUU30

GUC28

GUA82

GUG20

Ser S7.1%

UCU27

UCC65

UCA129

UCG5

AGU7

AGC37

Pro P5.8%

CCU20

CCC57

CCA133

CCG8

Thr T10.6%

ACU40

ACC164

ACA193

ACG5

Ala A6.1%

GCU29

GCC123

GCA75

GCG4

Tyr Y3.1%

UAU35

UAC83

His H2.8%

CAU22

CAC83

Gln Q2.7%

CAA97

CAG6

Asn N4.3%

AAU30

AAC132

Lys K2.3%

AAA83

AAG4

Asp D1.6%

GAU17

GAC45

Glu E2.3%

GAA78

GAG8

Cys C0.8%

UGU12

UGC18

Trp W2.8%

UGA91

UGG15

Arg R1.8%

CGU5

CGC9

CGA51

CGG3

Gly G5.6%

GGU24

GGC66

GGA82

GGG38

Stop 0.2%

UAA8

UAG0

AGA1

AGG0

Genome map

38 annotated features in NC_012833.1

Hover, tap or tab to a feature to see its position, length, strand and GC content. Genes and rRNAs open their own pages.

Protein-coding13
rRNA2
tRNA22
D-loop1

Outer ring: + strand, arrows run clockwise. Inner ring: − strand.
Middle ring: GC% of each gene against the whole genome (41.5%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).

All 38 features as a table

Annotated features of Trionyx triunguis (NC_012833.1)
Feature	Type	Start	End	Length	Strand	GC
tRNA-Phe	Transfer RNA	1	69	69 bp	+	–
12S rRNA	Ribosomal RNA	70	1,046	977 bp	+	42.5%
tRNA-Val	Transfer RNA	1,047	1,116	70 bp	+	–
16S rRNA	Ribosomal RNA	1,117	2,724	1,608 bp	+	40.1%
tRNA-Leu (UUR)	Transfer RNA	2,725	2,800	76 bp	+	–
ND1	Protein-coding gene	2,801	3,772	972 bp	+	43.5%
tRNA-Ile	Transfer RNA	3,773	3,842	70 bp	+	–
tRNA-Gln	Transfer RNA	3,842	3,912	71 bp	−	–
tRNA-Met	Transfer RNA	3,912	3,980	69 bp	+	–
ND2	Protein-coding gene	3,981	5,019	1,039 bp	+	39.4%
tRNA-Trp	Transfer RNA	5,020	5,093	74 bp	+	–
tRNA-Ala	Transfer RNA	5,105	5,173	69 bp	−	–
tRNA-Asn	Transfer RNA	5,175	5,248	74 bp	−	–
tRNA-Cys	Transfer RNA	5,280	5,345	66 bp	−	–
tRNA-Tyr	Transfer RNA	5,346	5,413	68 bp	−	–
COX1	Protein-coding gene	5,415	6,953	1,539 bp	+	43.5%
tRNA-Ser (UCN)	Transfer RNA	6,956	7,025	70 bp	−	–
tRNA-Asp	Transfer RNA	7,026	7,095	70 bp	+	–
COX2	Protein-coding gene	7,096	7,782	687 bp	+	41.6%
tRNA-Lys	Transfer RNA	7,784	7,856	73 bp	+	–
ATP8	Protein-coding gene	7,858	8,022	165 bp	+	35.8%
ATP6	Protein-coding gene	8,013	8,696	684 bp	+	43.0%
COX3	Protein-coding gene	8,696	9,479	784 bp	+	46.7%
tRNA-Gly	Transfer RNA	9,480	9,548	69 bp	+	–
ND3	Protein-coding gene	9,549	9,898	350 bp	+	41.8%
tRNA-Arg	Transfer RNA	9,900	9,968	69 bp	+	–
ND4L	Protein-coding gene	9,969	10,265	297 bp	+	44.1%
ND4	Protein-coding gene	10,259	11,639	1,381 bp	+	43.3%
tRNA-His	Transfer RNA	11,640	11,709	70 bp	+	–
tRNA-Ser (AGY)	Transfer RNA	11,710	11,771	62 bp	+	–
tRNA-Leu (CUN)	Transfer RNA	11,771	11,842	72 bp	+	–
ND5	Protein-coding gene	11,843	13,621	1,779 bp	+	41.9%
ND6	Protein-coding gene	13,617	14,141	525 bp	−	41.1%
tRNA-Glu	Transfer RNA	14,142	14,209	68 bp	−	–
CYTB	Protein-coding gene	14,213	15,352	1,140 bp	+	44.2%
tRNA-Thr	Transfer RNA	15,356	15,428	73 bp	+	–
tRNA-Pro	Transfer RNA	15,444	15,512	69 bp	−	–
D-loop	Control region	15,513	16,590	1,078 bp	–	32.9%