Helminthophis frontalis (PETERS, 1860)
Can you confirm these amateur observations of Helminthophis frontalis?
|Higher Taxa||Anomalepididae, Typhlopoidea, Serpentes, Squamata (snakes)|
|Common Names||E: Costa Rica Blind Snake|
|Synonym||Typhlops (Helminthophis) frontalis PETERS 1860: 517|
Helminthophis frontalis — PETERS 1881
Helminthophis frontalis — BOULENGER 1893: 5
Helminthophis frontalis — MCDIARMID, CAMPBELL & TOURÉ 1999: 49
Helminthophis frontalis — SAVAGE 2002
Helminthophis frontalis — WALLACH et al. 2014: 324
|Distribution||Costa Rica, Panama|
Type locality: “Costa Rica”
|Types||Syntypes: ZMB 3823, 3925|
|Diagnosis||Diagnosis (genus): Members of the genus share the following distinctive characteristics that will distinguish them from other genera of blind worm snakes: enlarged, nonpolygonal head plates that have rounded, posterior margins; prefrontal plates meeting on the midline to separate rostral and pre-frontal; frontal enlarged, rounded, and similar in appearance to dorsal scales, but about twice as large. Scale rows around midbody 20 to 24; tail with a terminal spine. Helminthophis differs from the extralimital Typhlophis in head scutellation, since the upper head scales in the latter genus are similar in size and shape to the dorsal scutes (Savage 2002: 554).|
DIAGNOSIS: A tiny species with the head and neck pinkish in life, lacking enlarged ventral scales, and with the minute eyes hidden under scales (Savage 2002: 554).
SIMILAR SPECIES: (1) Anomalepis mexicanus has the head colored like the body. (2) Liotyphlops albirostris has a light spot on the snout and the rostral and frontal in contact. (3) Typhlops costaricensis has the undersides of the posterior venter and tail yellow. (4) Leptotyphlops ater has a yellow tail tip and only 14 scale rows around the mid body. (5) Caecilians genera lack epidermal scales (Savage 2002: 554).
|Comment||Type species: Typhlops (Helminthophis) frontalis PETERS 1860: 517 is the type species of the genus Helminthophis PETERS 1860.|