Tropidoclonion

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Tropidoclonion
Tropidoclonion lineatum texanum.jpg
Tropidoclonion lineatum , lined snake
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Colubridae
Subfamily: Natricinae
Genus: Tropidoclonion
Cope, 1860
Species:
T. lineatum
Binomial name
Tropidoclonion lineatum
(Hallowell, 1856)
Synonyms
  • Microps lineatus
    Hallowell, 1856
  • Storeria lineata
    Cope, 1860 [1]
  • Ischnognathus lineatus
    Boulenger, 1893 [2]
  • Tropidoclonium lineatum
    — Cope, 1900
  • Tropidoclonion lineatum
    Stejneger & Barbour, 1917 [1]

Tropidoclonion is a genus of snake in the subfamily Natricinae of the family Colubridae. The genus is monotypic, containing the sole species Tropidoclonion lineatum, commonly known as the lined snake. The species is endemic to North America.

Contents

Common names

Additional common names for T. lineatum include common snake, dwarf garter snake, grass snake, line snake, ribbon snake, streaked snake, striped snake, and swamp snake. [3]

Subspecies

Four subspecies are recognized as being valid, including the nominotypical subspecies. [4] [5]

Nota bene : A trinomial authority in parentheses indicates that the subspecies was originally described in a genus other than Tropidoclonion.

Etymology

The subspecific name, mertensi, is in honor of German herpetologist Robert Mertens. [6]

Geographic range

The lined snake is found throughout the central United States from Illinois to Texas.

Habitat

The preferred habitat of T. lineatum is grassland areas with soft, moist soils.

Description

The lined snake is olive green to brown with a distinctive tan or yellow stripe running down the middle of the back from head to tail. It has similar stripes, one down each side on scale rows 2 and 3. [7] On the belly, it has a double row of clean-cut black half-moon spots running down the middle. [8] It has a narrow head and small eyes.

Adult size is typically less than 35 cm (14 inches) in total length (including tail). However, maximum recorded total length is 53 cm (21 in). [9]

The keeled dorsal scales are arranged in 19 rows at midbody. There are only 5 or 6 upper labials. [9]

Behavior

The lined snake is semifossorial, spending most of its time hiding under rocks, leaf litter, logs, or buried in the soil.

Diet

The majority of the diet of T. lineatum consists of earthworms.

Reproduction

The lined snake is ovoviviparous, the young being born in August. The average brood is seven or eight. [10] The newborn juveniles are 10–12 cm (4-4¾ in.) long at birth. [8]

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References

  1. 1 2 Stejneger L, Barbour T (1917). A Check List of North American Amphibians and Reptiles. Cambridge, Massachusetts: Harvard University Press. 125 pp. (Tropidoclonion lineatum, pp. 99-100).
  2. Boulenger GA (1893). Catalogue of the Snakes in the British Museum (Natural History). Volume I., Containing the Families ... Colubridæ Aglyphæ, part. London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xiii + 448 pp. + Plates I-XXVIII. (Ischnognathus lineatus, pp. 289-290).
  3. Wright AH, Wright AA (1957).
  4. "Tropidoclonion lineatum ". ITIS (Integrated Taxonomic Information System). www.itis.gov.
  5. "Tropidoclonion lineatum ". The Reptile Database. www.reptile-database.org.
  6. Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN   978-1-4214-0135-5. (Tropidoclonion lineatum mertensi, p. 176).
  7. Schmidt KP, Davis DD (1941). Field Book of Snakes of the United States and Canada. New York: G.P. Putnam's Son's. 365 pp. (Tropidoclonion lineatum, pp. 257-259, Figure 83 + Plate 29, Top, on p. 349).
  8. 1 2 Conant R (1975). A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition. Boston: Houghton Mifflin. xviii + 429 pp. + Plates 1-48. ISBN   0-395-19979-4 (hardcover), ISBN   0-395-19977-8 (paperback). (Tropidoclonion lineatum, pp. 166-167 + Plate 24 + Map 123).
  9. 1 2 Smith HM, Brodie ED Jr (1982). Reptiles of North America: A Guide to Field Identification. New York: Golden Press. 240 pp. ISBN   0-307-13666-3 (paperback). (Tropidoclonion lineatum, pp. 152-153).
  10. Force ER (1931). "Habits and Birth of the Lined Snake, Tropidoclonion lineatum (Hallowell)". Copeia1931: 51-53.

Further reading