Craugastor hobartsmithi ( Taylor 1936 )

Jameson, Tom J. M., Streicher, Jeffrey W., Manuelli, Luigi, Head, Jason J. & Smith, Eric N., 2022, Miniaturization in Direct-Developing Frogs from Mexico with the Description of Six New Species, Herpetological Monographs 36 (1), pp. 1-48 : 25-27

publication ID

https://doi.org/ 10.1655/0733-1347-36.1.1

publication LSID

lsid:zoobank.org:pub:52832190-3BE2-4251-ABFB-61B1280270C9

DOI

https://doi.org/10.5281/zenodo.6518537

persistent identifier

https://treatment.plazi.org/id/03F287F8-FF91-FF9E-C8DF-C051FA4ABD00

treatment provided by

Carolina

scientific name

Craugastor hobartsmithi ( Taylor 1936 )
status

 

Craugastor hobartsmithi ( Taylor 1936) View in CoL

Eleutherodactylus hobartsmithi Taylor 1936:355 View in CoL . Holotype male ( FMNH 100114 ) from ‘‘Uruapan, Michoacán, Mexico.’’ [Examined] .

Microbatrachylus hobartsmithi (Taylor) View in CoL : Taylor 1940:501.

Craugastor hobartsmithi (Taylor) View in CoL : Crawford and Smith 2005:536.

Microbatrachylus pygmaeus Duellman 1961:34 View in CoL . [Misidentification].

Craugastor pygmaeus Ahumada-Carrillo et al. 2013:1338 View in CoL . [Misidentification].

Diagnosis. —Based on six specimens. Aspecies of Craugastor distinguished by the following combination of characters: (1) small adult sizes (males 11.3–15.2 mm, females ~ 16.7 mm; Table 5 View TABLE ); (2) full ossification of most skeletal elements in adults, lacking ossification beyond Stage 4 ( Table 3 View TABLE ); (3) absence of vomerine odontophores; (4) absence of posterolateral projection of frontoparietal; (5) presence of a row of 4–6 rounded tubercles along outer edge, and 1–3 in mid upper eyelid; (6) supratympanic fold poorly developed; (7) face flank barred with or without distinctive canthal stripe; (8) one or two postrictal tubercles; (9) gular region peppered with melanocytes; (10) dorsal surfaces finely blotched, usually with dark interorbital bar and suprascapular ^-shape, some individuals with pale dorsal color and four stripes, paravertebral and lateral, originating at corners of eyes and ending above groin (lateral more prominent); (11) middorsal ridge (dark or background color); (12) mostly smooth dorsum or with just fine tubercles or folds toward back; (11) body flank darker anteriorly, around axilla, slightly tubercular; (14) inguinal glands present and axillary glands absent in adults; (15) when leg adpressed to body, heel reaches between anterior corner of eye and snout; (16) outer tarsal ridge with 4–6 rounded to slightly pointed tubercles, no raised fringe; (17) finger and toe tips round, finger tips slightly expanded, toe tips expanded; (18) similar sizes of inner and outer metatarsal tubercles.

Downloaded From: https://bioone.org/journals/Herpetological-Monographs on 04 May 2022

Comparisons. — Craugastor hobartsmithi can be differentiated from C. bitonium , C. mexicanus , C. montanus , C. omiltemanus , C. polaclavus , C. pygmaeus , and C. rubinus by an inner metatarsal tubercle that is twice the size of the outer (these are similar sizes in C. hobartsmithi ). It can be differentiated from C. candelariensis and C. saltator by the presence of vomerine odontophores (absent in C. hobartsmithi ). It can be differentiated from C. cueyatl and C. portilloensis by the presence of posterolateral projections of the frontoparietal (absent in C. hobartsmithi ).

Description. —In previous literature, C. hobartsmithi has been described as small-bodied with pigmented gonads ( Taylor 1936, 1940); presence of tubercles on the tarsus ( Duellman 1961); two palmar tubercles ( Lynch 1965); tarsus bearing a row of tubercles along its outer edge ( Lynch 1970).

Holotype (FMNH 100114) small male (13.5 mm); snout rounded and short (0.9 mm naris–snout; 6% SVL); short eye–nostril distance (1.18 mm; 8.7% SVL); tympanum 1.9 mm (14% SVL). We further examined two specimens of C. cf. hobartsmithi from coastal Michoacán (UTA A-66133–34; Fig. 25B and C View FIG ) and noted the following characteristics: supratympanic fold terminating in two postrictal tubercles; finger length formula III <IV ¼ II <I; toe length formula IV <III <V <II <I; inner metatarsal tubercle and outer metatarsaltubercle equal size.

Distribution. — Craugastor hobartsmithi occurs in the pine–oak forest of Michoacán. Craugastor cf. hobartsmithi occurs throughout western Mexico in low to intermediate habitats of Jalisco, Nayarit, Michoacán, Guerrero, and Sinaloa ( Fig. 8 View FIG ; Hardy and McDiarmid 1969). FloresCobarrubias et al. (2012) reported C. hobartsmithi from Hostotipaquillo, Jalisco. García and Ceballos (1994) reported C. hobartsmithi from coastal Jalisco. The records of C. pygmaeus reported in Duellman (1961) and AhumadaCarrillo et al. (2013) are all likely C. hobartsmithi or C. cf. hobartsmithi because our molecular results indicate that C. pygmaeus does not occur west of Guerrero. Similarly, many iNaturalist (https://www.inautralist.org, accessed June 2019) accounts of C. cf. hobartsmithi are listed under C. pygmaeus —these accounts also suggest that C. cf. hobartsmithi is much more widely distributed in western Mexico than museum collections indicate.

Downloaded From: https://bioone.org/journals/Herpetological-Monographs on 04 May 2022

Phylogenetics. — Craugastor cf. hobartsmithi was found to be the sister taxon of C. rubinus with strong support (ML ¼ 100; BAYES ¼ 1.0) in both the concatenated and separate mtDNA and nDNA analyses ( Figs. 3 View FIG , 4 View FIG , and 5). The pairwise P -distances between C. cf. hobartsmithi and C. rubinus is 3.4% ( Table 4 View TABLE ); this is the smallest genetic distance between any species of the C. mexicanus series, suggesting recent divergence.

Remarks. —The skull of C. hobartsmithi is similar to C. montanus and C. pygmaeus , with more posteriorly placed anterior suture of frontoparietal and prootic than in other species. We tentatively referred several museum collections to C. hobartsmithi ( Fig. 8 View FIG ) as C. cf. hobartsmithi , but these should be further examined. The specimens of C. pygmaeus reported by Duellman (1961) from Arteaga, Michoacán, are referred to C. cf. hobartsmithi because we examined several C. pygmaeus from Oaxaca with tubercles on the outer edge of the tarsus rendering Duellman’s (1961) apomorphic character for C. hobartsmithi unreliable. Craugastor hobartsmithi may co-occur with C. pygmaeus in southcentral Guerrero ( Figs. 6 View FIG and 8 View FIG ). The tissues of C. cf. hobartsmithi used in our phylogenetic analysis originated from Colima. Although we lack a voucher specimen for the tissue, the collector of the tissue (J. Reyes-Velasco) provided us with photographs of C. cf. hobartsmithi from Montitlan, near where the tissue was collected ( Fig. 25E and F View FIG ). One female specimen of C. hobartsmithi from near Uruapan (UMMZ 94230) had several intradermal trombiculid mites on its venter ( Fig. 15D View FIG ).

Kingdom

Animalia

Phylum

Chordata

Class

Amphibia

Order

Anura

Family

Craugastoridae

Genus

Craugastor

Loc

Craugastor hobartsmithi ( Taylor 1936 )

Jameson, Tom J. M., Streicher, Jeffrey W., Manuelli, Luigi, Head, Jason J. & Smith, Eric N. 2022
2022
Loc

Microbatrachylus hobartsmithi (Taylor)

Taylor, E. H. 1940: 501
1940
Loc

Eleutherodactylus hobartsmithi

Taylor, E. H. 1936: 355
1936
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF