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Jan’s Blind Snake
Scientific classification
Kingdom :
Phylum :
Class :
Order :
Suborder :
Family :
Genus :
Species :
Binomial name :
English name :
Sinhala name :
  Animalia
Chordata
Reptilia
Squamata
Serpentes
Typhlopidae
Typhlops
T. mirus
Typhlops mirus (Jan, 1860)
Jan’s Blind Snake
Heen Kanaulla
Endemic species
 

Distributed range & status
This is an endemic species to Sri Lanka. They are found in Peradeniya, Colombo, Namunukula, GAmpola, KAndy Giritale, & Gannoruwa.

Scales

rostral

The scale is in same width through out. It spread towards the eye

frontal

 

supraoculars

 

parietals

 

prefrontals

Connects to the rostral

nasals

Enlarged & divided completely. They do not touch each other at the back of the rostral.

internasals

 

loreals

 

preoculars

Small in size but Distinct.

postoculars

 

temporals

2

Supralabials

4 (1st is smaller than the 2nd)

mental

 

infralabials

Slightly smaller than the Chin scales.

sublinguals

 

coastals

 

ventrals

 

anal

 

subcaudals

 

There are 18 mid body scale rows present. There are 298-360 scales on the body longitudinally.

Characteristics
The body is very small, elongated, thin & shiny. The snout is rounded & laterally not sharpened. It lacks a distinct neck. Small head is present same as the size of the body. The eyes are very clearly shown. The nostrils are at the lower lateral positions. They cannot be seen from the dorsal view. The blunt tail lacks a terminal spine.

Colour
Dorsal body is dark brown or black. Ventral body is pale cream coloured. The snout & the anal is yellowish-cream colour. The terminal spine of the tail is grey.

Venom
These snakes are non venomous. Do not try to attack.

Dentition
Data not found.

Behavior
They are mainly found in loose soil, litter, stones & decaying trunks of trees. They also have the ability to climb trees. When excited, they tend to move fast & an unpleasant odor is released from the cloaca.

Breeding
Data not found.

Growth
They grow up to 120-140mm.

Food
The diet of this snake consists of small arthropods, & worms.

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Type: Holotype: RMNH 3721
Type Locality : “Peradeniya, Ceylon” (JAN 1860)

Synonyms

  • Typhlops (Diaphorotyphlops) mirus JAN, in JAN & SORDELLI 1860
  • Typhlops mirus — GÜNTHER 1864: 176
  • Typhlops mirus — BOULENGER 1893: 52
  • Typhlops mirus — WALL 1921: 7
  • Typhlops mirus — SMITH 1943: 55
  • Typhlops ceylonicus SMITH 1943
  • Typhlops ceylonicus — DAS 1996
  • Typhlops mirus — DAS 1996
  • Typhlops mirus — MCDIARMID, CAMPBELL & TOURÉ 1999: 111
  • Typhlops ceylonicus — JANZEN et al. 2007
  • Typhlops mirus — JANZEN et al. 2007
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