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Common Rough-side
Scientific classification
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Sinhala name :
  Animalia
Chordata
Reptilia
Squamata
Serpentes
Colubridae
Aspidura
A.trachyprocta
Aspidura trachyprocta (Cope, 1860)
Common Rough-side
Dalawa madilla
Endemic species
 

Distributed range & status
These types of snakes are known as early arrivals & endemic to Sri Lanka, but also once found in Maldives island. Eskdale, Harasbedda, Labukalle, Monaragala, Langton estate of Thalawakale, Diyagama estate, Nanu oya, Sita Eliya, Maha Eliya, Nuwara Eliya, Horton plains, Namunukula, Kandy, Ramboda, Radella, Diyatalwa, Pattipola, Hakgala, Gammaduwa, Medamaha Nuwara, Pundaluoya, Ambewela, Diyatalawa, at elevations of 750-2100m. 

Scales

rostral

 

frontal

Pre frontal is smaller than lateral scales

supraoculars

 

parietals

 

prefrontals

 

nasals

divided

internasals

1

loreals

absent

preoculars

1 scale & pre frontal connects to eye anterior.

postoculars

2 contact with parietal. Lower scale is longer than the upper scale. Both scales connect with the lateral scale

temporals

1+2

Supralabials

6 (4 connect to eye)

mental

 

infralabials

 

sublinguals

 

coastals

Region of anal scale sometimes these bare keels. Larger in males.

ventrals

128-151

anal

undivided

subcaudals

11-26 undivided

15 mid body scale rows moderately over lapped scale.

Characteristics
They’re commonly encountered snakes. These snakes have a small head indistinct from neck, pointed snout, cylindrical body with a short & pointed tail.

Colour
Variable coloration is present. Dorsal colour range is black -brown to light reddish-brown colorations. Lateral stripes & 2-3 dark dorsal spots are present. Ventral body varies from heavily blotched with black to light yellow with red tint & just blotched on midline.

Venom
These snakes are non poisonous.

Dentition
Data not found.

Behavior
They are diurnal & loose soil burrowing snakes, found under rock piles, dry leaves, piles of humus & rotten logs within agricultural land. Some times they can be found in groups. Do not bite most of the time but if bitten it may cause mild local reaction, slight burning sensation & swelling. 

Breeding
They are oviparous snakes. They lay 2-12 eggs.

Growth
Female has a relatively larger body with a shorter tail.

Food
Diet consists of earth worms.

Identification
Aspidura trachyprocta can be differentiated from other Aspidura spp by differences of scales. 15 mid body scale are present.

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Synonyms

  • Aspidura trachyprocta COPE 1860: 75
  • Aspidura trachyprocta — BOULENGER 1893: 313
  • Aspidura trachyprocta — WALL 1921: 209
  • Aspidura trachyprocta — SMITH 1943: 337
  • Aspidura trachyprocta — DAS 1996: 54
  • Aspidura trachyprocta — JANZEN et al. 2007
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